SIST EN ISO 3613:2011
(Main)Metallic and other inorganic coatings - Chromate conversion coatings on zinc, cadmium, aluminium-zinc alloys and zinc-aluminium alloys - Test methods (ISO 3613:2010)
Metallic and other inorganic coatings - Chromate conversion coatings on zinc, cadmium, aluminium-zinc alloys and zinc-aluminium alloys - Test methods (ISO 3613:2010)
This International Standard specifies methods for the determination of
⎯ the presence of colourless chromate conversion coatings,
⎯ the presence of hexavalent chromium in colourless and coloured coatings on zinc or cadmium or
aluminium-zinc (mass fraction of aluminium: 55 %, within a range of 54 % to 56 % mass fraction) and zinc-aluminium (mass fraction of aluminium: 5 %) alloys,
⎯ the total chromium content per unit area on zinc and cadmium,
⎯ the mass per unit area of both colourless and coloured coatings,
⎯ the satisfactory adhesion of chromate conversion coatings, and
⎯ the quality of chromate coatings.
These methods are applicable
⎯ to colourless and coloured chromate conversion coatings containing trivalent and hexavalent chromium in varying proportions and produced by either chemical or electrochemical processes, and
⎯ only to chromate coatings that are free from any supplementary coatings, such as oil, water or solventbased polymers or wax.
Metallische und andere anorganische Überzüge - Chromatierüberzüge auf Zink, Cadmium, Aluminium-Zink- und Zink-Aluminium-Legierungen - Prüfverfahren (ISO 3613:2010)
Diese Internationale Norm legt Verfahren fest zur Bestimmung:
⎯ der Anwesenheit farbloser Chromatierüberzüge,
⎯ der Anwesenheit von sechswertigem Chrom in farblosen und farbigen Überzügen auf Zink oder Cadmium
oder Legierungen aus Aluminium-Zink (mit einem Massenanteil von 55 % Aluminium in einem Bereich
von 54 % bis 56 % Massenanteil) und aus Zink-Aluminium (mit einem Massenanteil von 5 % Aluminium);
⎯ des Gesamtchromgehalts je Flächeneinheit auf Zink und Cadmium,
⎯ der flächenbezogenen Masse farbloser und farbiger Überzüge,
⎯ der zufriedenstellenden Haftfestigkeit von Chromatierüberzügen, und
⎯ der Qualität eines Chromatierüberzuges.
Diese Verfahren sind anwendbar:
⎯ auf farblose und farbige Chromatierüberzüge, die dreiwertiges und sechswertiges Chrom in veränderlichen
Anteilen enthalten und durch chemische oder elektrochemische Verfahren erzeugt wurden, und
⎯ nur auf Chromatierüberzüge, die frei von weiteren Schichten sind, wie Öl, in Wasser oder Lösungsmittel
gelösten Polymeren oder Wachs.
Revêtements métalliques et autres revêtements inorganiques - Couches de conversion au chromate sur zinc, cadmium et alliages d'aluminium-zinc et de zinc-aluminium - Méthodes d'essai (ISO 3613:2010)
L'ISO 3613:2010 spécifie des méthodes permettant de déterminer
la présence de couches de conversion au chromate incolores,
la présence de chrome hexavalent dans les couches colorées et incolores sur zinc, cadmium ou alliages d'aluminium-zinc (fraction massique d'aluminium de 55 %, dans une plage de 54 % à 56 %) et de zinc-aluminium (fraction massique d'aluminium de 5 %),
la teneur totale en chrome par unité de surface sur zinc et cadmium,
la masse par unité de surface des couches incolores et colorées,
le degré d'adhérence des couches de conversion au chromate, et
la qualité des couches de conversion au chromate.
Protikorozijska zaščita kovin in zlitin - S kromanjem nanesene plasti na cinku, kadmiju, zlitinah aluminij-cink in cink-aluminij - Metode preskušanja (ISO 3613:2010)
Ta mednarodni standard določa metode za določevanje:
⎯ prisotnosti heksavalentnega kroma v brezbarvnih in obarvanih plasteh na cinku ali kadmiju ali
zlitinah aluminij-cink (masni delež aluminija: 55 %, v razponu 54 % do 56 % masnega deleža) in zlitinah cink-aluminij (masni delež aluminija: 5 %);
⎯ skupne vsebnosti kroma na enoto površine cinka in kadmija;
⎯ mase na enoto površine brezbarvnih in obarvanih plasti;
⎯ zadovoljive adhezije s kromanjem nanesenih plasti in
⎯ kakovosti kromovih plasti.
Te metode veljajo za
⎯ brezbarvne in obarvane s kromanjem nanesene plasti, ki vsebujejo trivalentni in heksavalentni krom v različnih deležih in nastanejo s kemičnimi ali elektrokemičnimi procesi, in
⎯ samo za kromove plasti, ki ne vsebujejo dodatnih plasti, kot so polimeri na osnovi olj, vode ali topil ali voska.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 3613:2011
01-maj-2011
1DGRPHãþD
SIST EN ISO 3613:2002
3URWLNRUR]LMVND]DãþLWDNRYLQLQ]OLWLQ6NURPDQMHPQDQHVHQHSODVWLQDFLQNX
NDGPLMX]OLWLQDKDOXPLQLMFLQNLQFLQNDOXPLQLM0HWRGHSUHVNXãDQMD ,62
Metallic and other inorganic coatings - Chromate conversion coatings on zinc, cadmium,
aluminium-zinc alloys and zinc-aluminium alloys - Test methods (ISO 3613:2010)
Metallische und andere anorganische Überzüge - Chromatierüberzüge auf Zink,
Cadmium, Aluminium-Zink- und Zink-Aluminium-Legierungen - Prüfverfahren (ISO
3613:2010)
Revêtements métalliques et autres revêtements inorganiques - Couches de conversion
au chromate sur zinc, cadmium et alliages d'aluminium-zinc et de zinc-aluminium -
Méthodes d'essai (ISO 3613:2010)
Ta slovenski standard je istoveten z: EN ISO 3613:2010
ICS:
25.220.20 Površinska obdelava Surface treatment
SIST EN ISO 3613:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 3613:2011
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SIST EN ISO 3613:2011
EUROPEAN STANDARD
EN ISO 3613
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2010
ICS 25.220.20 Supersedes EN ISO 3613:2001
English Version
Metallic and other inorganic coatings - Chromate conversion
coatings on zinc, cadmium, aluminium-zinc alloys and zinc-
aluminium alloys - Test methods (ISO 3613:2010)
Revêtements métalliques et autres revêtements Metallische und andere anorganische Überzüge -
inorganiques - Couches de conversion au chromate sur Chromatierüberzüge auf Zink, Cadmium, Aluminium-Zink-
zinc, cadmium et alliages d'aluminium-zinc et de zinc- und Zink-Aluminium-Legierungen - Prüfverfahren (ISO
aluminium - Méthodes d'essai (ISO 3613:2010) 3613:2010)
This European Standard was approved by CEN on 3 December 2010.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3613:2010: E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 3613:2011
EN ISO 3613:2010 (E)
Contents Page
Foreword .3
2
---------------------- Page: 4 ----------------------
SIST EN ISO 3613:2011
EN ISO 3613:2010 (E)
Foreword
This document (EN ISO 3613:2010) has been prepared by Technical Committee ISO/TC 107 “Metallic and
other inorganic coatings” in collaboration with Technical Committee CEN/TC 262 “Metallic and other inorganic
coatings” the secretariat of which is held by BSI.
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 June 2011, and conflicting national standards shall be withdrawn at
the latest by June 2011.
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 3613:2001.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 3613:2010 has been approved by CEN as a EN ISO 3613:2010 without any modification.
3
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SIST EN ISO 3613:2011
---------------------- Page: 6 ----------------------
SIST EN ISO 3613:2011
INTERNATIONAL ISO
STANDARD 3613
Third edition
2010-12-15
Metallic and other inorganic coatings —
Chromate conversion coatings on zinc,
cadmium, aluminium-zinc alloys and zinc-
aluminium alloys — Test methods
Revêtements métalliques et autres revêtements inorganiques —
Couches de conversion au chromate sur zinc, cadmium et alliages
d'aluminium-zinc et de zinc-aluminium — Méthodes d'essai
Reference number
ISO 3613:2010(E)
©
ISO 2010
---------------------- Page: 7 ----------------------
SIST EN ISO 3613:2011
ISO 3613:2010(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
COPYRIGHT PROTECTED DOCUMENT
© ISO 2010
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
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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 2010 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 3613:2011
ISO 3613:2010(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.
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 3613 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings.
This third edition cancels and replaces the second edition (ISO 3613:2000), which has been technically
revised.
© ISO 2010 – All rights reserved iii
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SIST EN ISO 3613:2011
ISO 3613:2010(E)
Introduction
This International Standard specifies methods for the qualitative determination of the presence of chromate
conversion coatings as well as the total chromium content of chromate conversion coatings.
The application of very thin, colourless, practically invisible chromate conversion coatings is frequently called
“passivation”, while the application of thicker, coloured chromate conversion coatings is called “chromating”.
The term “passivation” is not correct, does not comply with the ISO 2080 designation and is therefore
deprecated.
iv © ISO 2010 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 3613:2011
INTERNATIONAL STANDARD ISO 3613:2010(E)
Metallic and other inorganic coatings — Chromate conversion
coatings on zinc, cadmium, aluminium-zinc alloys and zinc-
aluminium alloys — Test methods
WARNING — This International Standard calls for the use of substances and/or procedures that may
be injurious to health if adequate safety measures are not taken. This International Standard does not
address any health hazards, safety or environmental matters associated with its use. It is the
responsibility of the user of this International Standard to establish appropriate health, safety and
environmentally acceptable practices and take suitable actions for any national and international
regulations. Compliance with this International Standard does not in itself confer immunity from legal
obligations.
1 Scope
This International Standard specifies methods for the determination of
⎯ the presence of colourless chromate conversion coatings,
⎯ the presence of hexavalent chromium in colourless and coloured coatings on zinc or cadmium or
aluminium-zinc (mass fraction of aluminium: 55 %, within a range of 54 % to 56 % mass fraction) and
zinc-aluminium (mass fraction of aluminium: 5 %) alloys,
⎯ the total chromium content per unit area on zinc and cadmium,
⎯ the mass per unit area of both colourless and coloured coatings,
⎯ the satisfactory adhesion of chromate conversion coatings, and
⎯ the quality of chromate coatings.
These methods are applicable
⎯ to colourless and coloured chromate conversion coatings containing trivalent and hexavalent chromium in
varying proportions and produced by either chemical or electrochemical processes, and
⎯ only to chromate coatings that are free from any supplementary coatings, such as oil, water or solvent-
based polymers or wax.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 3892, Conversion coatings on metallic materials — Determination of coating mass per unit area —
Gravimetric methods
ISO 4520, Chromate conversion coatings on electroplated zinc and cadmium coatings
IEC 60068-2-30, Environmental testing — Part 2-30: Tests — Test Db: Damp heat, cyclic (12 h + 12 h cycle)
© ISO 2010 – All rights reserved 1
---------------------- Page: 11 ----------------------
SIST EN ISO 3613:2011
ISO 3613:2010(E)
3 Reagents
Use only reagents of recognized analytical grade and distilled water or water of equivalent purity, unless
otherwise specified, for analysis.
3.1 Test solution A (see 5.2).
Dissolve 1 g of diphenylcarbazide in a mixture of 20 ml of acetone, 60 ml of glacial acetic acid and 40 ml of
3
distilled water contained in a beaker. Add 15 ml of concentrated hydrochloric acid (ρ = 1,18 g/cm ), stir and
add slowly 30 ml of sodium hypochlorite solution (10 % to 15 % available chlorine). Add 5 ml of hydrogen
peroxide (30 % volume fraction) slowly with continuous stirring. Leave the solution in the open beaker for 24 h
in a fume cupboard, to allow excess chlorine to escape, before use.
The solution does not deteriorate with age and can be kept in a bottle with a loosely fitted stopper. However,
there may be losses due to evaporation and the concentration may alter so it is discarded after 6 months.
3.2 Test solution B (see 5.3).
Dissolve 50 g of lead acetate trihydrate [(CH COO) Pb⋅3H O] in 1 l of distilled water or water of equivalent
3 2 2
purity. Ensure that the pH of the solution is between 5,5 and 6,8 as prepared. If the pH of the solution is
outside this range, discard the solution and obtain a new supply of lead acetate.
Any white precipitate formed during the initial preparation of the solution may be dissolved by small additions
of glacial acetic acid, provided that the pH is not reduced to a value below 5,5. Discard the stock solution if the
white precipitate does not disappear.
3.3 Test solution C (see 5.5)
3.3.1 Test solution C 1
Dissolve 0,4 g of diphenylcarbazide in a mixture of 20 ml of acetone and 20 ml of ethanol (96 %). After
dissolution, add 20 ml of 75 % orthophosphoric acid solution and 20 ml of distilled water. Prepare this solution
not more than 8 h prior to use.
3.3.2 Test solution C 2
Add 700 ml of orthophosphoric acid, of specific gravity 1,7, to 250 ml of distilled water or water of equivalent
purity and make up to 1 000 ml.
Dissolve 1,0 g of 1,5-diphenylcarbazide in 100 ml of acetone, adding one drop of glacial acetic acid to help
dissolution. Keep the solution in a dark glass bottle in the refrigerator. The solution shall be discarded after
4 weeks.
For the Cr(VI) standard solution, dissolve 0,113 g of K Cr O in distilled water or water of equivalent purity
2 2 7
and make up to the mark in a 1 000 ml volumetric flask. Measure 2,5 ml of this solution into a second 1 000 ml
volumetric flask and make up to the mark. 1 ml of this standard solution contains 0,1 µg of Cr(VI). The solution
shall be discarded after 9 months.
For the preparation of comparison solution, add 1 ml of phosphoric acid and 1 ml of diphenylcarbazide
solution to 50 ml of standard Cr(VI) solution, and mix thoroughly. Allow the solution to stand for 10 min for the
colour reaction to be completed.
3.4 Test solution D (see 5.6 and 5.7).
Dissolve 0,50 g of diphenylcarbazide in 50 ml of acetone. Dilute slowly, while stirring, with 50 ml of water
(rapid mixing can result in precipitation of diphenylcarbazide).
For maximum stability, store the solution under refrigeration in an amber-coloured glass bottle.
2 © ISO 2010 – All rights reserved
---------------------- Page: 12 ----------------------
SIST EN ISO 3613:2011
ISO 3613:2010(E)
3.5 Sulfuric acid, diluted 1 + 3.
3
Slowly add 1 volume of concentrated sulfuric acid (ρ = 1,84 g/cm ) to 3 volumes of water.
3.6 Ammonium persulfate [(NH ) S O ].
4 2 2 8
3.7 Sodium hydroxide (NaOH), 240 g/l solution.
3.8 Silver nitrate (AgNO ), 17 g/l solution.
3
3.9 Potassium dichromate (K Cr O ), standard solution.
2 2 7
Dilute 2 ml of standard volumetric potassium dichromate solution (4,9 g/l) to 1 000 ml.
3.10 Phosphate buffer solution.
Dissolve 55 g of sodium dihydrogen orthophosphate monohydrate (NaH PO⋅H O) in 100 ml of water.
2 4 2
4 Apparatus
Use normal laboratory apparatus and the following.
Clean all glassware thoroughly. It is recommended that cleaning be done by boiling the glassware with nitric
acid (HNO ) of 30 % mass fraction and then rinsing thoroughly with distilled water or water of equivalent
3
purity.
4.1 Photoelectric absorptiometer
...
SLOVENSKI STANDARD
oSIST prEN ISO 3613:2009
01-september-2009
3URWLNRUR]LMVND]DãþLWDNRYLQLQ]OLWLQ6NURPDWHQMHPQDQHVHQHSODVWLQDFLQNX
NDGPLMX]OLWLQDKDOXPLQLMFLQNLQFLQNDOXPLQLM0HWRGHSUHVNXãDQMD ,62',6
Metallic and other inorganic coatings - Chromate conversion coatings on zinc, cadmium,
aluminium-zinc alloys and zincaluminium alloys - Test methods (ISO/DIS 3613:2009)
Metallische und andere anorganische Überzüge - Chromatierüberzüge auf Zink,
Cadmium, Aluminium-Zinkund Zink-Aluminium-Legierungen - Prüfverfahren (ISO/DIS
3613:2009)
Revêtements métalliques et autres revêtements inorganiques - Couches de conversion
au chromate sur zinc, cadmium et alliages d'aluminium-zinc et de zincaluminium -
Méthodes d'essai (ISO/DIS 3613:2009)
Ta slovenski standard je istoveten z: prEN ISO 3613
ICS:
25.220.20 Površinska obdelava Surface treatment
oSIST prEN ISO 3613:2009 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 3613:2009
---------------------- Page: 2 ----------------------
oSIST prEN ISO 3613:2009
EUROPEAN STANDARD
DRAFT
prEN ISO 3613
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2009
ICS 25.220.20 Will supersede EN ISO 3613:2001
English Version
Metallic and other inorganic coatings - Chromate conversion
coatings on zinc, cadmium, aluminium-zinc alloys and zinc-
aluminium alloys - Test methods (ISO/DIS 3613:2009)
Revêtements métalliques et autres revêtements Metallische und andere anorganische Überzüge -
inorganiques - Couches de conversion au chromate sur Chromatierüberzüge auf Zink, Cadmium, Aluminium-Zink-
zinc, cadmium et alliages d'aluminium-zinc et de zinc- und Zink-Aluminium-Legierungen - Prüfverfahren (ISO/DIS
aluminium - Méthodes d'essai (ISO/DIS 3613:2009) 3613:2009)
This draft European Standard is submitted to CEN members for parallel enquiry. It has been drawn up by the Technical Committee
CEN/TC 262.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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 Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 3613:2009: E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN ISO 3613:2009
prEN ISO 3613:2009 (E)
Contents Page
Foreword .3
2
---------------------- Page: 4 ----------------------
oSIST prEN ISO 3613:2009
prEN ISO 3613:2009 (E)
Foreword
This document (prEN ISO 3613:2009) has been prepared by Technical Committee ISO/TC 107 "Metallic and
other inorganic coatings" in collaboration with Technical Committee CEN/TC 262 “Metallic and other inorganic
coatings” the secretariat of which is held by BSI.
This document is currently submitted to the parallel Enquiry.
This document will supersede EN ISO 3613:2001.
Endorsement notice
The text of ISO/DIS 3613:2009 has been approved by CEN as a prEN ISO 3613:2009 without any
modification.
3
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oSIST prEN ISO 3613:2009
---------------------- Page: 6 ----------------------
oSIST prEN ISO 3613:2009
DRAFT INTERNATIONAL STANDARD ISO/DIS 3613
ISO/TC 107 Secretariat: KATS
Voting begins on: Voting terminates on:
2009-07-02 2009-12-02
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Metallic and other inorganic coatings — Chromate conversion
coatings on zinc, cadmium, aluminium-zinc alloys and zinc-
aluminium alloys — Test methods
Revêtements métalliques et autres revêtements inorganiques — Couches de conversion au chromate sur zinc,
cadmium et alliages d'aluminium-zinc et de zinc-aluminium — Méthodes d'essai
[Revision of second edition (ISO 3613:2000)]
ICS 25.220.20
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for Standardization (ISO), and
processed under the ISO-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, 2009
---------------------- Page: 7 ----------------------
oSIST prEN ISO 3613:2009
ISO/DIS 3613
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall
not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the
unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user's country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying,
recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO's
member body in the country of the requester.
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ii ISO 2009 – All rights reserved
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oSIST prEN ISO 3613:2009
ISO/DIS 3613
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.
International Standard ISO 3613 was prepared by Technical Committee ISO/TC 107, Metallic and other
inorganic coating.
This third edition cancels and replaces the second edition (ISO 3613), which has been technically revised.
© ISO 2009 – All rights reserved iii
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oSIST prEN ISO 3613:2009
ISO/DIS 3613
Introduction
This International Standard specifies methods for the determination of the presence, qualitatively, as well as
the total chromium content of chromate conversion coatings.
The application of very thin, colourless, practically invisible chromate conversion coatings is frequently called
“passivation”, while the application of thicker, coloured chromate conversion coatings is called “chromating”.
The term “passivation” is not correct, does not comply with ISO 2080 designation and is, therefore,
deprecated.
iv © ISO 2009 – All rights reserved
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oSIST prEN ISO 3613:2009
DRAFT INTERNATIONAL STANDARD ISO/DIS 3613
Metallic and other inorganic coatings — Chromate conversion
coatings on zinc, cadmium, aluminium-zinc alloys and zinc-
aluminium alloys — Test methods
WARNING - This International Standard calls for the use of substances and/or procedures that may
be injurious to health if adequate safety measures are not taken. This International Standard does not
address any health hazards, safety or environmental matters associated with its use. It is the
responsibility of the user of this International Standard to establish appropriate health, safety and
environmentally acceptable practices and take suitable actions for any national and International
regulations. Compliance with this International Standard does not of itself confer immunity from legal
obligations.
1 Scope
This International Standard specifies methods for the determination of the
presence of colourless chromate conversion coatings;
total and quantity of hexavalent chromium in colourless and coloured coatings on zinc, cadmium, aluminium
(55 % mass fraction within a range of 54 % to 56 % mass fraction)) – zinc and zinc-aluminium (5 % mass
fraction) alloys;
total chromium content per unit area on zinc and cadmium;
mass per unit area of both colourless and coloured coatings;
satisfactory adhesion of chromate conversion coatings;
quality of chromate coatings.
These methods are applicable
to colourless and coloured chromate conversion coatings containing tri- and hexa- valent chromium in varying
proportions and produced by either chemical or electrochemical processes;
only to chromate coatings that are free from any supplementary coatings such as oil, water or solvent-based
polymers or wax
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 3892, Conversion coatings on metallic materials — Determination of coating mass per unit area —
Gravimetric methods.
ISO 4520, Chromate conversion coatings on electroplated zinc and cadmium coatings.
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oSIST prEN ISO 3613:2009
ISODIS 3613
ASTM B 117, Standard Practice for Operating Salt Spray (Fog) Apparatus
IEC 60068-2-30 Environmental testing — Part 2: Tests. Test Db and guidance: Damp heat, cyclic (12 + 12
hour cycle).
3 Reagents
During the analysis, unless otherwise stated, use only reagents of recognized analytical grade and only
distilled water or water of equivalent purity.
3.1 Test solution A (see 5.2).
Dissolve 1g of diphenylcarbazide in a mixture of 60 ml glacial acetic acid and 40 ml distilled water contained in
3
a beaker. Add 15 ml of concentrated hydrochloric acid (ρ = 1,18 g/cm ), stir and add slowly 30 ml of sodium
hypochlorite solution (10 % to 15 % available chlorine). Add 5 ml of hydrogen peroxide (30 % vol fraction)
slowly with continuous stirring. Leave the solution in the open beaker for 24 h in a fume cupboard, to allow
excess chlorine to escape, before use.
NOTE The solution does not deteriorate with age and therefore can be kept in a bottle with a loosely fitting glass
stopper for around six months.
3.2 Test solution B (see 5.3).
Dissolve 50 g of lead acetate trihydrate [(CH COO) Pb . 3H O] in 1 l of distilled water or water of equivalent
3 2 2
purity. Ensure that the pH of the solution is between 5,5 and 6,8 as prepared. If the pH of the solution is
outside this range, discard the solution and obtain a new supply of lead acetate.
Any white precipitate formed during the initial preparation of the solution may be dissolved by small additions
of glacial acetic acid, provided that the pH is not reduced to a value below 5,5. Discard the stock solution if the
white precipitate does not disappear.
3.3 Test solution C (see 5.5)
3.3.1 Test solution C 1
Dissolve 0,4 g of diphenylcarbazide in a mixture of 20 ml acetone and 20 ml ethanol (96 % ). After dissolution,
add 20 ml of 75 % orthophosphoric acid solution and 20 ml of distilled water. Prepare this solution not more
than 8 h prior to use.
3.3.2 Test solution C 2
Add 700 ml of orthophosphoric acid of specific gravity 1.7 to 250 ml distilled water or water of equivalent purity
and make up to 1000 ml
Dissolve 1,0 g of 1,5-Diphenylcarbazide in 100 ml acetone adding one drop of glacial acetic acid to help
dissolution. Keep the solution in a dark glass bottle in the refrigerator. The solution shall be discarded after 4
weeks.
For Cr(VI) Standard solution, dissolve 0 ,113 g of K Cr O in distilled water or water of equivalent purity and
2 2 7
make up to the mark of 1 000 ml in a volumetric flask. Measure 2,5 ml of this solution into a second 1 000 ml
volumetric flask and make up to the mark. 1 ml of this standard solution contains 0,1 µg Cr(VI). The solution
shall be discarded after 9 months.
For the preparation of comparison solution, add 1 ml phosphoric acid and 1 ml diphenylcarbazide solution to
50 ml of standard Cr(VI) solution and mix thoroughly. Allow the solution to stand for 10 min for the colour
reaction to be completed.
3.4 Test solution D (see 5.6 and 5.7).
Dissolve 0,50 g of diphenylcarbazide in 50 ml of acetone. Dilute slowly, while stirring, with 50 ml of water
2 © ISO 2009 – A
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