SIST EN ISO 9934-2:2015
(Main)Non-destructive testing - Magnetic particle testing - Part 2: Detection media (ISO 9934-2:2015)
Non-destructive testing - Magnetic particle testing - Part 2: Detection media (ISO 9934-2:2015)
This document specifies the significant properties of magnetic particle testing products (including magnetic ink, powder, carrier liquid, contrast aid paints) and the methods for checking their properties.
Zerstörungsfreie Prüfung - Magnetpulverprüfung - Teil 2: Prüfmittel (ISO 9934-2:2015)
Essais non destructifs - Magnétoscopie - Partie 2: Produits magnétoscopiques (ISO 9934-2:2015)
ISO 9934-2:2015 spécifie les principales propriétés des produits magnétoscopiques (incluant liqueur magnétique, poudre magnétique, liquide porteur, peintures de contraste) et les méthodes permettant de vérifier leurs propriétés.
Neporušitveno preskušanje - Preskušanje z magnetnimi delci - 2. del: Sredstva za preiskave (ISO 9934-2:2015)
Ta dokument določa pomembne lastnosti izdelkov, ki se preskušajo z magnetnimi delci (vključno z magnetnim črnilom, prahom, nosilno tekočino, kontrastnimi barvili), in metode za preverjanje njihovih lastnosti.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 9934-2:2015
01-december-2015
1DGRPHãþD
SIST EN ISO 9934-2:2004
Neporušitveno preskušanje - Preskušanje z magnetnimi delci - 2. del: Sredstva za
preiskave (ISO 9934-2:2015)
Non-destructive testing - Magnetic particle testing - Part 2: Detection media (ISO 9934-
2:2015)
Zerstörungsfreie Prüfung - Magnetpulverprüfung - Teil 2: Prüfmittel (ISO 9934-2:2015)
Essais non destructifs - Magnétoscopie - Partie 2: Produits magnétoscopiques (ISO
9934-2:2015)
Ta slovenski standard je istoveten z: EN ISO 9934-2:2015
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
SIST EN ISO 9934-2:2015 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 9934-2:2015
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SIST EN ISO 9934-2:2015
EN ISO 9934-2
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2015
EUROPÄISCHE NORM
ICS 19.100 Supersedes EN ISO 9934-2:2002
English Version
Non-destructive testing - Magnetic particle testing - Part 2:
Detection media (ISO 9934-2:2015)
Essais non destructifs - Magnétoscopie - Partie 2: Zerstörungsfreie Prüfung - Magnetpulverprüfung - Teil
Produits indicateurs (ISO 9934-2:2015) 2: Prüfmittel (ISO 9934-2:2015)
This European Standard was approved by CEN on 10 July 2015.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9934-2:2015 E
worldwide for CEN national Members.
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SIST EN ISO 9934-2:2015
EN ISO 9934-2:2015 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 9934-2:2015
EN ISO 9934-2:2015 (E)
European foreword
This document (EN ISO 9934-2:2015) has been prepared by Technical Committee
CEN/TC 138 “Non-destructive testing”, the secretariat of which is held by AFNOR, in collaboration with
Technical Committee ISO/TC 135 “Non-destructive testing”.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2016, and conflicting national standards shall
be withdrawn at the latest by March 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN ISO 9934-2:2002.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 9934-2:2015 has been approved by CEN as EN ISO 9934-2:2015 without any
modification.
3
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SIST EN ISO 9934-2:2015
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SIST EN ISO 9934-2:2015
INTERNATIONAL ISO
STANDARD 9934-2
Second edition
2015-09-01
Non-destructive testing — Magnetic
particle testing —
Part 2:
Detection media
Essais non destructifs — Magnétoscopie —
Partie 2: Produits indicateurs
Reference number
ISO 9934-2:2015(E)
©
ISO 2015
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SIST EN ISO 9934-2:2015
ISO 9934-2:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
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SIST EN ISO 9934-2:2015
ISO 9934-2:2015(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Safety precautions . 2
5 Classification . 2
5.1 General . 2
5.2 Magnetic inks. 2
5.3 Powders. 2
6 Testing and test certificate . 2
6.1 Type testing and batch testing . 2
6.2 In-service testing . 2
7 Requirements and test methods . 2
7.1 Performance . 2
7.1.1 Type testing and batch testing . 2
7.1.2 In-service testing . 3
7.1.3 Contrast aid paints . 3
7.2 Colour . 3
7.3 Particle size . 3
7.3.1 Method . 3
7.3.2 Definition of the particle size . 3
7.4 Temperature resistance. 3
7.5 Fluorescent coefficient and fluorescent stability . 3
7.5.1 Type testing . 4
7.5.2 Batch testing . 5
7.6 Fluorescence of carrier liquid . 5
7.7 Flash point . 5
7.8 Corrosion induced by detection media . 5
7.8.1 Corrosion testing on steel . 5
7.8.2 Corrosion testing of copper . 5
7.9 Viscosity of the carrier liquid . 5
7.10 Mechanical stability . 5
7.10.1 Long term test (endurance test) . 5
7.10.2 Short-term test . 6
7.11 Foaming . 8
7.12 pH . 8
7.13 Storage stability . 8
7.14 Solids content . 8
7.15 Sulfur and halogen content . 8
8 Testing requirements . 8
9 Test report . 9
10 Packaging and labelling . 9
Annex A (normative) Procedure for type, batch, and in-service testing .10
Annex B (normative) Reference blocks .12
Annex C (normative) Corrosion testing of steel .17
Bibliography .21
© ISO 2015 – All rights reserved iii
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SIST EN ISO 9934-2:2015
ISO 9934-2:2015(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.
ISO 9934-2 was prepared by the European Committee for Standardization (CEN) Technical Committee
CEN/TC 138, Non-destructive testing, in collaboration with ISO/TC 135, Non-destructive testing,
Subcommittee SC 2, Surface methods, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 9934-2:2002), which has been
technically revised.
ISO 9934 consists of the following parts under the general title Non-destructive testing — Magnetic
particle testing:
— Part 1: General principle
— Part 2: Detection media
— Part 3: Equipment
iv © ISO 2015 – All rights reserved
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SIST EN ISO 9934-2:2015
INTERNATIONAL STANDARD ISO 9934-2:2015(E)
Non-destructive testing — Magnetic particle testing —
Part 2:
Detection media
1 Scope
This part of ISO 9934 specifies the significant properties of magnetic particle testing products (including
magnetic ink, powder, carrier liquid, contrast aid paints) and the methods for checking their properties.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 2160, Petroleum products — Corrosiveness to copper — Copper strip test
ISO 2591-1, Test sieving — Part 1: Methods using test sieves of woven wire cloth and perforated metal plate
ISO 3059, Non-destructive testing — Penetrant testing and magnetic particle testing — Viewing conditions
ISO 3104, Petroleum products — Transparent and opaque liquids — Determination of kinematic viscosity
and calculation of dynamic viscosity
ISO 4316, Surface active agents — Determination of pH of aqueous solutions — Potentiometric method
ISO 9934-1, Non-destructive testing — Magnetic particle testing — Part 1: General principle
ISO 9934-3, Non-destructive testing — Magnetic particle testing — Part 3: Equipment
ISO 12707, Non-destructive testing — Terminology — Terms used in magnetic particle testing
EN 1330-1, Non-destructive testing — Terminology — Part 1: List of general terms
EN 1330-2, Non-destructive testing — Terminology — Part 2: Terms common to the non-destructive
testing methods
EN 1330-7, Non-destructive testing — Terminology — Part 7: Terms used in magnetic particle testing
EN 10083-2, Quenched and tempered steels — Part 2: Technical delivery conditions for non-alloy steels
EN 10204, Metallic products — Types of inspection documents
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1330-1, EN 1330-2, EN 1330-7,
ISO 12707, and the following apply.
3.1
batch
quantity of material produced during one manufacturing operation having uniform properties
throughout and with a unique identifying number or mark
© ISO 2015 – All rights reserved 1
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SIST EN ISO 9934-2:2015
ISO 9934-2:2015(E)
4 Safety precautions
The materials used in magnetic particle inspection and those used in their testing include chemicals
that can be harmful, flammable, and/or volatile. All necessary precautions should be observed. All
relevant regulations, including national and local regulations pertaining to health and safety, anti-
pollution requirements, etc., shall be observed.
5 Classification
5.1 General
The magnetic particle materials covered by this specification shall be classified as follows.
5.2 Magnetic inks
Magnetic inks shall consist of finely divided coloured or fluorescent magnetic particles in a suitable
carrier liquid. They shall form a uniform suspension when agitated.
Magnetic inks can be produced from products supplied as concentrates, including paste and powders,
or ready for use.
5.3 Powders
Powders for the dry technique shall consist of finely divided coloured or fluorescent magnetic particles.
6 Testing and test certificate
6.1 Type testing and batch testing
Type testing and batch testing of magnetic particle materials shall be carried out in accordance with
the requirements of ISO 9934-1, ISO 9934-2, and ISO 9934-3.
Type testing is carried out in order to demonstrate suitability of a product for the intended use. Batch
testing is carried out in order to demonstrate conformity of the characteristics of a batch to the product
type specified.
The supplier shall provide a test certificate showing compliance with this International Standard having
used the methods detailed. This certificate shall include results obtained and tolerances allowed.
If any changes are made to the detection media, then a new type test shall be performed.
6.2 In-service testing
In–service testing is carried out to demonstrate the continued performance of the detection media.
7 Requirements and test methods
7.1 Performance
7.1.1 Type testing and batch testing
Type testing and batch testing shall be carried out according to Annex A using the reference blocks
type 1 or type 2 as described in Annex B.
2 © ISO 2015 – All rights reserved
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SIST EN ISO 9934-2:2015
ISO 9934-2:2015(E)
7.1.2 In-service testing
In-service testing shall be carried out according to Annex A using one of the reference blocks type 1 or
type 2 as described in Annex B or a test block which exhibit similar discontinuities to those normally
found in components typically processed in the equipment.
7.1.3 Contrast aid paints
Type testing and batch testing shall be carried out according to 7.1.1 after having applied the paint in
accordance with the manufacturer instructions and using a type test approved, compatible magnetic ink.
7.2 Colour
The colour of magnetic particles detection media under working conditions shall be stated by the supplier.
The colour of the batch test sample shall not differ from the colour of the type test sample when
visually compared.
7.3 Particle size
7.3.1 Method
The method for determination of particle size is dependent on the range of the particle size distribution.
[2]
For magnetic inks, the particle size distribution can be determined by the Coulter Method or an
equivalent method.
7.3.2 Definition of the particle size
The range of particle size shall be as follows:
— lower diameter, d : no more than 10 % of the particles shall be smaller than d ;
l l
— average diameter, d : 50 % of the particles shall be larger and 50 % by volume smaller than d ;
a a
— upper diameter, d : no more than 10 % by volume of the particles shall be larger than d .
u u
d , d , and d shall be reported.
l a u
For dry powders, d is generally ≥40 µm.
l
7.4 Temperature resistance
There shall be no degradation of the product after 5 min heating at the maximum temperature specified
by the supplier. This shall be verified by repeating the performance test as specified in 7.1.1.
7.5 Fluorescent coefficient and fluorescent stability
To carry out these tests, it is necessary to use a dry sample of the particles.
© ISO 2015 – All rights reserved 3
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SIST EN ISO 9934-2:2015
ISO 9934-2:2015(E)
7.5.1 Type testing
7.5.1.1 Method
The fluorescent coefficient β in cd/W is defined as given in Formula (1):
β=LE (1)
e
where
2
L is the luminance in cd/m of a plane powder surface;
2
E is the level of UV-irradiance in W/m at the surface of the powder.
e
The arrangement of the apparatus used is shown in Figure 1.
The powder surface shall be evenly irradiated with UV-A at an angle of 45° ± 5°. Luminance shall be
measured with a suitable meter with an accuracy of ±10 % or better. It shall measure the luminance
from the powder surface and be unaffected by areas outside of the target area. The level of irradiance
shall be measured with a meter conforming to ISO 3059 with its UV sensor replacing the powder surface.
2
The recommended arrangement is using a luminance meter with a 200 cd/m range and a viewing
angle (α) of 20° placed 80 mm above the plane powder surface, diameter 40 mm. UV-A lamps are placed
2 2
so as to give an even irradiance at the powder surface, with E between 10 W/m and 15 W/m .
e
Key
1 measurement of luminance
2 lamp
3 UV-A radiation
4 measurement point of the irradiance
5 powder surface
Figure 1 — Determination of the fluorescent coefficient, β, for magnetic particles
4 © ISO 2015 – All rights reserved
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SIST EN ISO 9934-2:2015
ISO 9934-2:2015(E)
7.5.1.2 Requirements
The fluorescent coefficient (β) shall be greater than 1,5 cd/W.
7.5.1.3 Fluorescence stability
The sample shall first be tested according to the method described in 7.5.1.1.
The sample shall then be exposed and re-tested as described in 7.5.1.1 after 30 min of exposure to UV-A
2
irradiance of 20 W/m (minimum). The fluorescent coefficient shall not decrease more than 5 %.
7.5.2 Batch testing
Batch testing shall be carried out according to 7.5.1.1. The fluorescent coefficient shall be within 10 %
of the type test value.
7.6 Fluorescence of carrier liquid
The fluorescence of the carrier liquid shall be checked by visually comparing with quinine sulfate
2
solution when irradiated with UV-A of at least 10 W/m .
−9
The concentration of the quinine sulfate solution shall be 7 × 10 M in 0,1 N H SO .
2 4
The carrier liquid under test shall exhibit no more fluorescence than the quinine sulfate solution.
7.7 Flash point
For magnetic inks, other than water-based, the flash point (open cup method) of the carrier fluid
shall be reported.
7.8 Corrosion induced by detection media
7.8.1 Corrosion testing on steel
The corrosive effect on steel shall be tested and reported according to Annex C.
7.8.2 Corrosion testing of copper
The corrosive effect on copper shall be tested. ISO 2160 can be used for petroleum-based products.
7.9 Viscosity of the carrier liquid
The viscosity shall be tested according to ISO 3104.
The dynamic viscosity shall not be higher than 5 mPa⋅s at 20 °C ± 2 °C.
7.10 Mechanical stability
7.10.1 Long term test (endurance test)
The manufacturer shall show that the detection media is unaffected by use in a typical magnetic
particle testing bench over a period of 120 h.
This can be proven in a magnetic particle testing bench or by using an arrangement to simulate this; a
recommended arrangement is as follows.
A 40 l sample of the detection media, contained in a corrosion resistant reservoir fitted with a
centrifugal pump is recirculated and the flow interrupted by a valve.
© ISO 2015 – All rights reserved 5
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SIST EN ISO 9934-2:2015
ISO 9934-2:2015(E)
Technical data:
Type of the sump pump EN 12157 T 160-270-1
Diameter of the return flow nominally 25 mm or 1” bore
Cycle time
— valve opened 5 s
— valve closed 5 s
The detection media is checked with a reference block (see 7.1.1) before use and after 120 h.
Any discernible change in the quality of indications is cause for rejection.
7.10.2 Short-term test
7.10.2.1 Equipment
A stirring arrangement similar to Figure 2 shall be used.
1) Speed of stirring blade: 3 000 +0/-300 r/min.
2) Stirring cup: Capacity 2 l.
3) Reference blocks type 1 and type 2 as detailed in Annex B.
2
4) UV-A source to give irradiance of 10 W/m , to the requirement of ISO 3059.
7.10.2.2 Procedure
Stir a sample for 2 h. Compare the indications on reference block Type 1 and Type 2 as is defined in
Annex B, produced by the stirred probe and the reference probe.
7.10.2.3 Requirements
Any discernible change in the quality of indications shall be cause for rejection.
6 © ISO 2015 – All rights reserved
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SIST EN ISO 9934-2:2015
ISO 9934-2:2015(E)
Dimensions in millimetres
Key
1 motor shaft 8 4 stator plates, 2 mm thick – Height of support ~
170 mm
2 clutch 9 axle
3 support plate for stator plates 10 support (adjustable)
4 support ring distance setting 10 mm from the bottom11 pilot ring
5 fixing angle for stator plates 12 non-slip pad
6 spraying plate 13 base plate
7 cup ISO 3819 – HF 2000 14 blade
Gap dimensions:
S = 2 ± 0,5
h
s , …, s = 2 ± 0,5
1 4
(s + s )/2 = 2 ± 0,2
1 3
(s + s )/2 = 2 ± 0,2
2 4
NOTE 1 Tolerances are to be ensured in the 4 blade positions.
NOTE 2 Made from corrosion resistant non-ferromagnetic material.
Figure 2 — Construction of the stirring arrangement to 7.10.2.1
© ISO 2015 – All rights reserved 7
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SIST EN ISO 9934-2:2015
ISO 9934-2:2015(E)
7.11 Foaming
Foaming shall be checked during mechanical stability test to 7.10.1 or 7.10.2. Significant foaming shall
be cause for rejection.
7.12 pH
The pH of aqueous carrier liquids shall be determined according to ISO 4316.
...
SLOVENSKI STANDARD
oSIST prEN ISO 9934-2:2013
01-oktober-2013
Neporušitveno preskušanje - Preskušanje z magnetnimi delci - 2. del: Sredstva za
preiskave (ISO/DIS 9934-2:2013)
Non-destructive testing - Magnetic particle testing - Part 2: Detection media (ISO/DIS
9934-2:2013)
Zerstörungsfreie Prüfung - Magnetpulverprüfung - Teil 2: Prüfmittel (ISO/DIS 9934-
2:2013)
Essais non destructifs - Magnétoscopie - Partie 2: Produits magnétoscopiques (ISO/DIS
9934-2:2013)
Ta slovenski standard je istoveten z: prEN ISO 9934-2
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
oSIST prEN ISO 9934-2:2013 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 9934-2:2013
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oSIST prEN ISO 9934-2:2013
DRAFT INTERNATIONAL STANDARD ISO/DIS 9934-2
ISO/TC 135/SC 2 Secretariat: SABS
Voting begins on Voting terminates on
2013-05-23 2013-10-23
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Non-destructive testing — Magnetic particle testing —
Part 2:
Detection media
Essais non destructifs — Magnétoscopie —
Partie 2: Produits magnétoscopiques
[Revision of first edition (ISO 9934-2:2002)]
ICS 19.100
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the European Committee for Standardization (CEN), and
processed under the CEN-lead mode of collaboration as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel
five-month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments received, will be
submitted to a parallel two-month approval vote in ISO and formal vote in CEN.
To expedite distribution, this document is circulated as received from the committee
secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at
publication stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
© International Organization for Standardization, 2013
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oSIST prEN ISO 9934-2:2013
ISO/DIS 9934-2
COPYRIGHT PROTECTED DOCUMENT
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any
means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission.
Permission can be requested from either ISO at the address below or ISO’s member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
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oSIST prEN ISO 9934-2:2013
ISO/DIS 9934-2
Contents Page
Foreword .v
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Safety precautions .2
5 Classification .2
5.1 General.2
5.2 Magnetic inks.2
5.3 Powders .2
6 Testing and test certificate .2
6.1 Type testing and batch testing .2
6.2 In service testing .2
7 Requirements and test methods .2
7.1 Performance .2
7.1.1 Type testing and batch testing .2
7.1.2 In service testing .3
7.1.3 Contrast aid paints .3
7.2 Colour .3
7.3 Particle size .3
7.3.1 Method .3
7.3.2 Definition of the particle size .3
7.4 Temperature resistance .3
7.5 Fluorescent coefficient and fluorescent stability.3
7.5.1 Type testing .4
7.5.2 Batch testing .5
7.6 Fluorescence of carrier liquid .6
7.7 Flash point .6
7.8 Corrosion induced by detection media .6
7.8.1 Corrosion testing on steel .6
7.8.2 Corrosion testing of copper .6
7.9 Viscosity of the carrier liquid .6
7.10 Mechanical stability .6
7.10.1 Long term test (endurance test) .6
7.10.2 Short term test .7
7.11 Foaming .7
7.12 pH .7
7.13 Storage stability .7
7.14 Solids content.7
7.15 Sulphur and halogen content .7
8 Testing requirements .8
9 Test report .8
10 Packaging and labelling .8
Annex A (normative) Procedure for type, batch and in service testing .1
A.1 Preparation of the detection media .1
A.2 Cleaning of the reference blocks .1
A.3 Application of the detection media .1
A.4 Inspection and interpretation .1
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A.4.1 Inspection . 1
A.4.2 Interpretation . 1
A.5 Contrast aid paint . 2
Annex B (normative) Reference blocks . 3
B.1 Reference block type 1 . 3
B.1.1 Description . 3
B.1.2 Manufacturing . 3
B.1.3 Verification . 3
B.2 Reference block type 2 . 4
B.2.1 Description . 4
B.2.2 Manufacturing . 5
B.2.3 Verification . 7
Annex C (normative) Corrosion testing of steel . 8
C.1 Principle. 8
C.2 Apparatus . 8
C.2.1 Petri-dish made of glass, of 100 mm outside diameter. . 8
C.2.2 Pipette with ml scale. . 8
C.2.3 Round filter paper, ø 90 mm, with a 40 mm diameter circle inscribed on it with indelible
ink. . 8
C.2.4 Stainless steel spatula. . 8
C.2.5 Mesh 5 sieve in accordance with ISO 2591-1. . 8
C.2.6 Balance accurate to 0,1 g. 8
C.3 Reagents and materials . 8
C.3.1 Acetone; . 8
C.3.2 Xylene; . 8
C.3.3 Steel granules grade 2C40 (according to EN 10083-1), generally 2,5 2,5 mm; . 8
C.3.4 Lamellar graphite general purpose cast iron granules; . 8
C.3.5 Hard water. . 8
C.3.6 Different stock solutions shall be prepared: . 8
C.3.7 From these stock solutions prepare three diluted solutions as follows: . 9
C.4 Test procedure . 9
C.4.1 Preparation of the solutions (100 ml) . 9
C.4.2 Preparation of the granules and filters. 9
C.4.3 Corrosion testing . 9
C.5 Interpretation of the results . 10
C.6 Expression of results . 10
C.7 Uncertainties . 10
Bibliography . 12
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Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 9934-2 was prepared by Technical Committee ISO/TC 135, Non-destructive testing, Subcommittee SC ,
and by Technical Committee CEN/TC 138, Non-destructive testing in collaboration.
This second edition cancels and replaces the first edition (ISO 9934-2:2002), which has been technically
revised.
ISO 9934 consists of the following parts, under the general title Non-destructive testing — Magnetic particle
testing:
Part 1: General principle
Part 2: Detection media
Part 3: Equipment
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Non-destructive testing — Magnetic particle testing — Part 2:
Detection media
1 Scope
This European Standard specifies the significant properties of magnetic particle testing products (including
magnetic ink, powder, carrier liquid, contrast aid paints) and the methods for checking their properties.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for
its application. For dated references, only the edition cited applies. For undated references, the latest edition of the
referenced document (including any amendments) applies.
EN 1330-1, Non destructive testing - Terminology - Part 1: List of general terms
EN 1330-2, Non destructive testing - Terminology - Part 2: Terms common to the non-destructive testing methods
EN 10083-1, Quenched and tempered steels - Part 1: Technical delivery conditions for special steels
EN 10204, Metallic products - Types of inspection documents
EN 12157, Rotodynamic pumps - Coolant pumps units for machine tools - Nominal flow rate, dimensions
ISO 2160, Petroleum products - Corrosiveness to copper - Copper strip test
ISO 3059, Non-destructive testing - Penetrant testing and magnetic particle testing - Viewing conditions
ISO 3104, Petroleum products - Transparent and opaque liquids - Determination of kinematic viscosity and
calculation of dynamic viscosity
ISO/DIS 9934-1, Non-destructive testing - Magnetic particle testing - Part 1: General principle
ISO/DIS 9934-3, Non-destructive testing - Magnetic particle testing - Part 3: Equipment
ISO/DIS 12707, Non-destructive testing - Terminology - Terms used in magnetic particle testing
ISO 2591-1, Test sieving - Part 1: Methods using test sieves of woven wire cloth and perforated metal plate
ISO 4316, Surface active agents - Determination of pH of aqueous solutions - Potentiometric method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1330-1, EN 1330-2 and ISO/DIS 12707
and the following apply.
3.1
batch
quantity of material produced during one manufacturing operation having uniform properties throughout and with a
unique identifying number or mark
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4 Safety precautions
The materials used in magnetic particle inspection and those used in their testing include chemicals that can be
harmful, flammable and/or volatile. All necessary precautions should be observed. All relevant regulations,
including national and local regulations pertaining to health and safety, anti-pollution requirements etc., shall be
observed.
5 Classification
5.1 General
The magnetic particle materials covered by this specification shall be classified as follows.
5.2 Magnetic inks
Magnetic inks shall consist of finely divided coloured or fluorescent magnetic particles in a suitable carrier liquid.
They shall form a uniform suspension when agitated.
Magnetic inks may be produced from products supplied as concentrates, including paste and powders, or ready for
use.
5.3 Powders
Powders for the dry technique shall consist of finely divided coloured and/or fluorescent magnetic particles.
6 Testing and test certificate
6.1 Type testing and batch testing
Type testing and batch testing of magnetic particle materials shall be carried out in accordance with the
requirements of ISO/DIS 9934-1, ISO/DIS 9934-2, and ISO/DIS 9934-3.
Type testing is carried out in order to demonstrate suitability of a product for the intended use. Batch testing is
carried out in order to demonstrate conformity of the characteristics of a batch to the product type specified.
The supplier shall provide a test certificate showing compliance with this standard having used the methods
detailed. This certificate shall include results obtained and tolerances allowed.
If any changes are made to the detection media, then a new type test shall be performed.
6.2 In service testing
In service testing is carried out to demonstrate the continued performance of the detection media.
7 Requirements and test methods
7.1 Performance
7.1.1 Type testing and batch testing
Type testing and batch testing shall be carried out according to Annex A using the reference blocks types 1 or 2 as
described in Annex B.
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7.1.2 In service testing
In service testing shall be carried out according to Annex A using one of the reference blocks types 1 or 2 as
described in Annex B or a test block which exhibit similar discontinuities to those normally found in components
typically processed in the equipment.
7.1.3 Contrast aid paints
Type testing and batch testing shall be carried out according to 7.1.1 after having applied the paint in accordance
with the manufacturer instructions and using a type test approved, compatible magnetic ink.
7.2 Colour
The colour of magnetic particles detection media under working conditions shall be stated by the supplier.
The colour of the batch test sample shall not differ from the colour of the type test sample when visually compared.
7.3 Particle size
7.3.1 Method
The method for determination of particle size is dependent on the range of the particle size distribution.
NOTE For magnetic inks the particle-size-distribution can be determined by the Coulter Method or an equivalent method
(see Bibliography).
7.3.2 Definition of the particle size
The range of particle size shall be as follows:
lower diameter d : no more than 10 % of the particles shall be smaller than d ;
l l
average diameter d : 50% of the particles shall be larger and 50 % smaller than d ;
a a
upper diameter d : no more than 10 % of the particles shall be larger than d .
u u
d d and d shall be reported.
l, a u
NOTE 1 Percentage values by volume.
NOTE 2 For powders d is generally > 40 µm.
l
7.4 Temperature resistance
There shall be no degradation of the product after 5 minutes heating at the maximum temperature specified by the
supplier. This shall be verified by repeating the performance test as specified in 7.1.1.
7.5 Fluorescent coefficient and fluorescent stability
To carry out these tests it is necessary to use dry powder. For magnetic inks the magnetic particle solid content
shall be used.
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7.5.1 Type testing
7.5.1.1 Method
The fluorescent coefficient in cd/W is defined as follows:
L E (1)
e
where
L luminance in cd/m² of a plane powder surface;
E level of UV-irradiance in W/m² at the surface of the powder.
e
The arrangement of the apparatus used is shown in Figure 1.
The powder surface shall be evenly irradiated with UV(A) at an angle of (45 5) °. Luminance shall be measured
with a suitable meter with an accuracy of 10 %. It shall measure the luminance from the powder surface and be
unaffected by areas outside of the target area. The level of irradiance shall be measured with a meter conforming
to ISO 3059 with its UV sensor replacing the powder surface.
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Key
1 Measurement of luminance
2 Lamp
3 UV radiation
4 Measurement point of the irradiance
5 Powder surface
Figure 1 - Determination of the fluorescent coefficient for magnetic particles
NOTE A recommended arrangement is using a luminance meter with a 200 cd/m² range and a viewing angle ( ) of 20 º
placed 80 mm above the plane powder surface, diameter 40 mm. UV (A) lamps are placed so as to give an even irradiance at
the powder surface, with E between 10 W/m² and 15 W/m².
e
7.5.1.2 Requirements
The fluorescent coefficient ( shall be greater than 1,5 cd/W.
7.5.1.3 Fluorescence stability
The sample shall first be tested according to the method described in 7.5.1.1.
The sample shall then be exposed and re-tested as described in 7.5.1.1 after 30 minutes of exposure to UV-A
irradiance of 20 W/m² (minimum). The fluorescent coefficient shall not decrease more than 5 %.
7.5.2 Batch testing
Batch testing shall be carried out according to 7.5.1.1. The fluorescent coefficient shall be within 10 % of the type
test value.
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7.6 Fluorescence of carrier liquid
The fluorescence of the carrier liquid shall be checked by visually comparing with quinine sulphate solution when
irradiated with UV-A of at least 10 W/m².
-9
The concentration of the quinine sulphate solution shall be 7 10 M (5,5 ppm) in 0,1 N H SO .
2 4
The carrier liquid under test shall exhibit no more fluorescence than the quinine sulphate solution.
7.7 Flash point
For magnetic inks, other than water based, the flash point (open cup method) of the carrier fluid shall be reported.
7.8 Corrosion induced by detection media
7.8.1 Corrosion testing on steel
The corrosive effect on steel shall be tested and reported according to Annex C.
7.8.2 Corrosion testing of copper
The corrosive effect on copper shall be tested according to ISO 2160.
7.9 Viscosity of the carrier liquid
The viscosity shall be tested according to ISO 3104.
The dynamic viscosity shall not be higher than 5 mPa s at 20 °C ( 2 °C)
7.10 Mechanical stability
7.10.1 Long term test (endurance test)
The manufacturer shall show that the detection media is unaffected by use in a typical magnetic particle testing
bench over a period of 120 h.
This may be proven in a magnetic particle testing bench or by using an arrangement to simulate this; a
recommended arrangement is as follows:
A 40 l sample of the detection media shall be contained in a corrosion resistant reservoir fitted with a centrifugal
pump. The detection media shall be recirculated and the flow interrupted by a valve.
Technical data:
Type of the sump pump EN 12157 - T 160-270-1
Diameter of the return flow RI 1" NB pipe
Cycle time
valve opened 5 s
valve closed 5 s
The detection media shall be checked with a reference block (see 7.1.1) before use and after 120 h.
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Any discernible change in the quality of indications shall be cause for rejection.
7.10.2 Short term test
7.10.2.1 Equipment
A stirring arrangement similar to Figure 2 shall be used.
0
1) Speed of stirring blade: (3000 ) rpm.
300
2) Stirring cup: Capacity 2 l.
3) Reference blocks type 1 and type 2 as detailed in Annex B.
4) UV-A source to give irradiance of 10 W/m², to the requirement of ISO 3059.
7.10.2.2 Procedure
Stir a 1 l sample for 2 h. Compare the indications on reference block N° 1 and N° 2 produced by the stirred probe
and the reference probe.
7.10.2.3 Requirements
Any discernible change in the quality of indications shall be cause for rejection.
7.11 Foaming
Foaming shall be checked during mechanical
...
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