EN 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)

ISO 3513:2010 specifies methods for the determination of the presence of colourless chromate conversion coatings, 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, 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, and quality of chromate coatings.

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

• Status: Withdrawn
• Publication Date: 14-Dec-2010
• Withdrawal Date: 13-Apr-2025
• ICS: 25.220.20 - Surface treatment
• ICS: 25.220.40 - Metallic coatings
• Technical Committee: CEN/TC 262 - Metallic and other inorganic coatings
• Drafting Committee: CEN/TC 262/WG 1 - Test methods
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 26-May-2021
• Completion Date: 14-Apr-2025
• Ref Project: SIST EN ISO 3613:2011 - Metallic and other inorganic coatings - Chromate conversion coatings on zinc, cadmium, aluminium-zinc alloys and zinc-aluminium alloys - Test methods (ISO 3613:2010)

Relations

• Replaces: EN ISO 3613:2001 - Chromate conversion coatings on zinc, cadmium, aluminium-zinc alloys and zinc-aluminium alloys - Test methods (ISO 3613:2000)
• Effective Date: 08-Jun-2022
• Replaces: EN 15205:2006 - Determination of hexavalent chromium in corrosion protection layers - Qualitative analysis
• Effective Date: 06-Dec-2017
• Replaced By: EN ISO 3613:2021 - Metallic and other inorganic coatings - Chromate conversion coatings on zinc, cadmium, aluminium-zinc alloys and zinc-aluminium alloys - Test methods (ISO 3613:2021)
• Effective Date: 17-Apr-2019

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2011
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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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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.

Contents Page
Foreword .3

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.

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
ISO 3613:2010(E)
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ii © ISO 2010 – All rights reserved

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 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

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 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
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

ISO 3613:2010(E)
3.5 Sulfuric acid, diluted 1 + 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.
3.9 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
purity.
4.1 Photoelectric absorptiometer
...