BSI Standards Publication Paints and varnishes — Electro-deposition coatings Part 3: Compatibility of electro-deposition coating materials with a reference oil BS ISO 22553-3:2019National foreword This British Standard is the UK implementation of ISO 22553-3:2019. The UK participation in its preparation was entrusted to Technical Committee STI/10, Test methods for paints. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. © The British Standards Institution 2019 Published by BSI Standards Limited 2019 ISBN 978 0 539 00125 9 ICS 87.040 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2019. Amendments/corrigenda issued since publication Date Text affected BRITISH STANDARD BS ISO 22553-3:2019© ISO 2019 Paints and varnishes — Electro- deposition coatings — Part 3: Compatibility of electro-deposition coating materials with a reference oil Peintures et vernis — Peintures d électrodéposition — Partie 3: Compatibilité des peintures d électrodéposition avec d une huile référence INTERNATIONAL STANDARD ISO 22553-3 First edition 2019-10-29 Reference number ISO 22553-3:2019(E) BS ISO 22553-3:2019 ISO 22553-3:2019(E)ii © ISO 2019 – All rights reserved COPYRIGHT PROTECTED DOCUMENT © ISO 2019, 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
[email protected] www.iso.org BS ISO 22553-3:2019 ISO 22553-3:2019Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Principle 2 5 Apparatus and materials 2 6 Reagents 3 7 Test panels 3 8 Number of determinations 3 9 Procedure. 3 9.1 Blank test . 3 9.2 Testing with reference oil as surface active agent 3 10 Evaluation 4 11 Precision . 4 12 Test report . 4 Bibliography 5 © ISO 2019 – All rights reserved iii Contents Page BS ISO 22553-3:2019 ISO 22553-3:2019 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 of the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISO s adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www.iso. org/iso/foreword.html. This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes. A list of all parts in the ISO 22553 series can be found on the ISO website. Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.iv © ISO 2019 – All rights reserved BS ISO 22553-3:2019 ISO 22553-3:2019 Introduction In practice, surface-reactive substances often contaminate the electro-deposition coating material inside the tank. These contaminants could be materials that are used in downstream production processes, e.g. forming additives, corrosion protection oils and chain lubricants. These surface-active substances can lead to surface defects in the e-coat and/or subsequent coats. Test methods for the determination of the compatibility of electro-deposition coating materials with liquid, paste-like and solid foreign substances, which influence the properties of the electro-deposition coating, are described in ISO 22553-4.© ISO 2019 – All rights reserved v BS ISO 22553-3:2019This page deliberately left blank Paints and varnishes — Electro-deposition coatings — Part 3: Compatibility of electro-deposition coating materials with a reference oil 1 Scope The document specifies a method for the determination of the compatibility of electro-deposition coating materials with a reference oil. It is applicable to electro-deposition coatings for automotive industries and other general industrial applications, e.g. chiller units, consumer products, radiators, aerospace, agriculture. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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 1514, Paints and varnishes — Standard panels for testing ISO 2808, Paints and varnishes — Determination of film thickness ISO 4618, Paints and varnishes — Terms and definitions ISO 13076, Paints and varnishes — Lighting and procedure for visual assessments of coatings ISO 22553-1, Paints and varnishes — Electro-deposition coatings — Part 1: Vocabulary ISO 23321, Solvents for paints and varnishes — Demineralized water for industrial applications — Specification and test methods 3 T erms a nd definiti ons For the purposes of this document, the terms and definitions given in ISO 4618, ISO 22553-1 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https:/ /www.iso.org/obp — IEC Electropedia: available at http:/ /www.electropedia.org/ 3.1 surface active agent surfactant substance that affects the interfacial or surface tension markedly, when present in very low concentrations [SOURCE: ISO 2080:2008, 3.187] INTERNATIONAL ST ANDARD ISO 22553-3:2019 © ISO 2019 – All rights reserved 1 BS ISO 22553-3:2019 ISO 22553-3:2019 4 Principle The test panel is coated with an electro-deposition coating material. Subsequently, this electro- deposition coating is contaminated with a reference oil and further test panels are coated. Then, the stoved coating of each test panel is visually evaluated. 5 Apparatus and materials Ordinary laboratory apparatus, together with the following. 5.1 Laboratory deposition system, consisting of a deposition tank with tank recirculation and DC voltage equipment, see Figure 1. Key 1 anode 5 anode (counter electrode for cathodic e-coat) 2 cathode 6 cathode (test panel for cathodic e-coat) 3 electro-deposition coating material 7 acid 4 deposition tank 8 electro-deposition coating material Figure 1 — Schematic diagram of a laboratory deposition system with cathodic e-coat material as example The container of the deposition system is filled with the electro-deposition coating material and the tank circulation (stirrer or pump) is initiated. Subsequently, the test panels are immersed in the container. The deposition conditions are adjusted according to the specification and the deposition process is initiated. Upon completion of the deposition process, remove the test panels from the container and thoroughly rinse using demineralized water as specified in ISO 23321, so that any excess of the electro- deposition coating material (cream coat) is removed. 5.2 5-l container. 5.3 Film thickness measuring device, with a maximum permissible error of 0,1 µm. 5.4 Thermometer, with a reading accuracy of 0,1 °C. 5.5 Timer, with a reading accuracy of 1 s.2 © ISO 2019 – All rights reserved BS ISO 22553-3:2019 ISO 22553-3:2019 5.6 Pipette, with a reading accuracy of 1 µl. 5.7 Oven, in which the test can be carried out reliably and where the specified or agreed test temperature can be held to within ±2 °C (for temperatures up to 150 °C) or ±3,5 °C (for temperatures between 150 °C and 200 °C). 6 Reagents 6.1 Butyl glycol, CAS-No 111-76-2, technically pure. 6.2 Reference oil 1) . 7 Test panels Use electrically conductive test panels with pretreatment as specified in ISO 1514 and with dimensions of approximately 190 mm × 105 mm × 0,75 mm. 8 Number of determinations Carry out the determination in triplicate. 9 Procedure 9.1 Blank test Fill the tank with the electro-deposition coating material up to about 1 cm below the edge and homogenize the coating material, e.g. using a stirring machine with a paddle stirrer (diameter min. 50 mm) at 500 min −1 , so that sufficient tank circulation is visually detectable. Put the test panel in the laboratory deposition system (5.1) and connect the anode and cathode to the current source. Maintain stirring the electro-deposition coating material with a stirring machine or a magnet stirrer. Set the bath temperature to the temperature specifically required for the product, to ±0,5 °C. NOTE Usually the temperature is in the range of 25 °C to 35 °C. Select the deposition voltage and deposition time so that the dry-film thickness to be expected of the electro-deposition coating on the test panel corresponds to the nominal dry-film thickness. Increase the voltage to the selected coating voltage (if necessary, without a series resistor). Maintain that voltage over the selected time. Remove the test panel after coating, rinse with demineralized water and dry/stove the test panel in accordance with the specification for the electro-deposition coating material. 9.2 Testing with reference oil as surface active agent Mix 10 ml of the reference oil (6.2) and 90 ml butyl glycol (6.1). Add 2,5 ml of this mixture to 5 l of the electro-deposition coating material. Homogenize the sample for 24 h, e.g. using a stirring machine with a paddle stirrer (diameter min. 50 mm) at 500 min −1 , so that sufficient tank circulation is visually detectable. 1) Information about sources of supply: DIN Standards Committee Coating materials and coatings, Burggrafenstr . 6, D-10787 Berlin.© ISO 2019 – All rights reserved 3 BS ISO 22553-3:2019 ISO 22553-3:2019 Position the test panel and the electro-deposition coating material in the laboratory deposition system (5.1) and connect the anode and cathode to the current source. Maintain stirring the electro-deposition coating material with a stirring machine or a magnet stirrer. Set the bath temperature to the temperature specifically required for the product, to ±0,5 °C. NOTE Usually the temperature is in the range of 25 °C to 35 °C. Select the deposition voltage and deposition time so that the dry-film thickness to be expected of the electro-deposition coating on the test panels corresponds to the nominal dry-film thickness. Increase the voltage to the selected coating voltage (if necessary, without a series resistor). Maintain that voltage over the selected time. Remove the test panel after coating, rinse with demineralized water and dry/stove the three test panels in accordance with the specification for the electro-deposition coating material. If the procedure is carried out with additional two test panels, it should be noted that with every subsequent test panel the reference oil is carried out. 10 Evaluation Visually examine the test panel from the blank test and those of the contaminated test specimens regarding surface defects, e.g. craters, streaks, as specified in ISO 13076. Record the number of craters on a surface area of 10 cm × 10 cm. Measure the dry-film thickness in accordance with one of the test methods described in ISO 2808. 11 Precision No precision data are currently available. 12 Test report The test report shall contain at least the following information: a) all the details necessary for the identification of the tested product (manufacturer, product labelling, batch number, etc.); b) a reference to this document, i.e. ISO 22553-3:2019; c) information on the reference oil: manufacturer, product labelling, batch number, etc.; d) the tank voltage (deposition voltage); e) the bath temperature; f) the coating time: adjustment time and holding time, in seconds; g) the stoving temperature and time; h) the dry-film thickness, including measuring method; i) the result of the blank test and of the contaminated test specimen in accordance with Clause 9; j) any agreed or other deviation from the specified test method; k) any unusual observations (anomalies) observed during the test; l) the date of the test.4 © ISO 2019 – All rights reserved BS ISO 22553-3:2019 ISO 22553-3:2019 Bibliography [1] ISO 2080:2008, Metallic and other inorganic coatings — Surface treatment, metallic and other inorganic coatings — Vocabulary [2] ISO 22553-4, Paints and varnishes — Electro-deposition coatings — Part 4: Compatibility of electro-deposition coating materials with liquid, paste-like and solid foreign materials© ISO 2019 – All rights reserved 5 BS ISO 22553-3:2019 BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services. 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