SIST 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



SIST EN ISO 4623-2:2004



SIST EN ISO 4623-2:2004



SIST EN ISO 4623-2:2004



SIST EN ISO 4623-2:2004



SIST EN ISO 4623-2:2004



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
SIST EN ISO 4623-2:2004



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© ISO 2003 — All rights reserved
SIST EN ISO 4623-2:2004



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
SIST EN ISO 4623-2:2004



ISO 4623-2:2003(E) iv
© ISO 2003 — All rights reserved 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 4623-2 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes. ISO 4623 consists of the following parts, under the general title Paints and varnishes — Determination of resistance to filiform corrosion:  Part 1: Steel substrates  Part 2: Aluminium substrates SIST EN ISO 4623-2:2004



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



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
© ISO 2003 — All rights reserved 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 filiform corrosion type of corrosion proceeding under a coat of paint, varnish or related product, in the form of threads, generally starting from bare edges or f
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