EN ISO 4623-2:2004

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Beschichtungsstoffe - Bestimmung der Beständigkeit gegen Filiformkorrosion - Teil 2: Aluminium als Substrat (ISO 4623-2:2003)Peintures et vernis - Détermination de la résistance a la corrosion filiforme - Partie 2: Subjectiles en aluminium (ISO 4623-2:2003)Paints and varnishes - Determination of resistance to filiform corrosion - Part 2: Aluminium substrates (ISO 4623-2:2003)87.040Barve in lakiPaints and varnishesICS:Ta slovenski standard je istoveten z:EN ISO 4623-2:2004SIST EN ISO 4623-2:2004en01-julij-2004SIST EN ISO 4623-2:2004SLOVENSKI
STANDARD
Reference numberISO 4623-2:2003(E)© ISO 2003
INTERNATIONAL STANDARD ISO4623-2First edition2003-03-01Paints and varnishes — Determination of resistance to filiform corrosion —
Part 2: Aluminium substrates Peintures et vernis — Détermination de la résistance à la corrosion filiforme —
Partie 2: Subjectiles en aluminium
ISO 4623-2:2003(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.
©
ISO 2003 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 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 4623-2:2003(E) © ISO 2003 — All rights reserved
iii Contents Page Foreword.iv Introduction.v 1 Scope.1 2 Normative references.1 3 Terms and definitions.2 4 Principle.2 5 Required supplementary information.2 6 Sampling.2 7 Apparatus.2 8 Reagents.3 9 Test panels.3 10 Procedure.3 11 Evaluation of the degree of filiform corrosion.5 12 Precision.5 13 Test report.5 Annex A (normative)
Required supplementary information.6
ISO 4623-2:2003(E) iv
ISO 4623-2:2003(E) © ISO 2003 — All rights reserved
v Introduction A scribe mark cut through a coating of paints or varnishes on metal can give rise to various types of corrosion, such as blistering of the coating, corrosion of the metal under the coating as well as filiform corrosion. Filiform corrosion tends to develop under specific conditions of temperature and relative humidity and when traces of acids, bases or salts are present either under the paint coating or at breaks in the coating. These conditions are often found in marine and/or industrial environments. A certain amount of under-corrosion of the substrate, starting from the scribe mark, will always occur. Filiform corrosion, however, is considered to be present only if the typical pattern in the form of threads is obvious. SIST EN ISO 4623-2:2004

INTERNATIONAL STANDARD ISO 4623-2:2003(E) © ISO 2003 — All rights reserved
1 Paints and varnishes — Determination of resistance to filiform corrosion — Part 2: Aluminium substrates 1 Scope This part of ISO 4623 describes a test procedure for assessing the protective action of coatings of paints or varnishes on aluminium against filiform corrosion arising from a scribe mark cut through the coating. It is only suitable for assessing the performance of the coating/substrate combination tested. It is not suitable for predicting the performance of the coating on different substrates. 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 1513, Paints and varnishes — Examination and preparation of samples for testing ISO 1514, Paints and varnishes — Standard panels for testing ISO 2808, Paints and varnishes — Determination of film thickness ISO 3270, Paints and varnishes and their raw materials — Temperatures and humidities for conditioning and testing ISO 4628-8, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, and of intensity of uniform changes in appearance — Part 8: Evaluation of corrosion around a scribe ISO 4628-10, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, and of intensity of uniform changes in appearance — Part 10: Assessment of filiform corrosion ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling SIST EN ISO 4623-2:2004

ISO 4623-2:2003(E) 2
...