ISO INTERNATIONAL STANDARD 4623-2 Second edition 2016-08-15 Paints and varnishes Determination of resistance to filiform corrosion - Part 2: Aluminium substrates Peintures etvernis-Déterminationde la resistance a la corrosion filiforme Partie2:Subjectilesenaluminium Reference number ISO 4623-2:2016(E) ISO @ IS0 2016 IS04623-2:2016(E) Contents Page Foreword .iv Introduction. 1 Scope. 2 Normative references. 3 Terms and definitions. 4 Principle. 5 Sampling.. 2 6 Apparatus. 2 7 Reagents 8 Test panels 2 8.1 Material and dimensions. 2 8.2 Preparation and coating: 3 8.3 Drying and conditioning 8.4 Thickness of coating.... 3 9 Procedure 3 9.1 Determination 9.2 Scribing the test panels. 9.3 Testing 5 9.4 Inspection of test panels 5 10 Evaluation of the degree of filiform corrosion 5 11 Precision 5 12 Test report Bibliography @IS0 2016-All rights reserved ili IS0 4623-2:2016(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 wwwiso.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 ofisO 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 the following URL: wwwiso.org/iso/foreword.html. The committee responsible for this document is IsO/TC 35, Paints and varnishes, Subcommittee Sc 9, General test methods for paints and varnishes. This second edition cancels and replaces the first edition (IS0 4623-2:2003), which has been technically revised. It also incorporates the Technical Corrigendum IS0 4623-2:2003/Cor 1:2005. The following mainchangeshavebeenmade: a) duplicate determination has been changed to triplicate determination; b)information on the shape ofthe scribe marks has been added; c)the width of the scribe marks has been changed to be in line with EN 3665; d) a note on using the CAsS test for initiating filiform corrosion was added; e)the supplementary test conditions previously in Annex A have been integrated in the test report. Iso 4623 consists of the following parts, under the general title Paints and varnishes - Determination of resistancetofiliformcorrosion: Part 1: Steel substrates Part2:Aluminium substrates iv @ IS0 2016 -All rights reserved