4543 International Standard (ISO INTE RNATIONAL ORGANIZATION FOR STANDARDIZATION+MEXAYHAPOAHAR OPrAHM3ALM IO CTAHAAPTM3ALW-ORGANiSATION INTE RNATIONALE DE NORMALISATION Metallic and other non-organic coatings - General rules for corrosion tests applicable for storage conditions Revetements metalliques et autres revetements non organiques -- Directives generales pour les essais de corrosion applicables aux conditions de stockage First edition - 1981-05-15 UDC 669.058 : 620.193 Ref. No. 1SO 4543-1981 (E) ISO 4543-1981 (E) Descriptors : coatings, protective coatings, metal coatings, storage, corrosion tests. Price based on 5 pages Copyright International Organization for Standardization ed without license from IHS Not for Resale No Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO member bodies). The work of developing Inter- national Standards is carried out through ISo technical committees. Every member body interested in a subject for which a technical committee has been set up has the and non-governmental, in liaison with iso, also take part in the work. Draft International Standards adopted by the technical committees are circuiated to the member bodies for approval before their acceptance as International Standards by the ISO Council. Internationai Standard ISO 4543 was developed by Technical Committee ISO/TC 107, Metallic and other non-organic coatings, and was circulated to the member bodies in November 1978. Australia India South Africa, Rep. of Bulgaria Italy Spain Czechoslovakia Japan Sweden Egypt, Arab Rep. of Netherlands Switzerland France New Zealand Turkey Germany, F. R. Poland USA Hungary Romania USSR The member body of the following country expressed disapproval of the document on technical grounds : United Kingdom International Organization for Standardization, 1981 C Printed in Switzerland Copyright Internatinal Organization for Standardization Not for Resale ed without license from IHS ISO 4543-1981 (E) INTERNATIONAL STANDARD Metallic and other non-organic coatings -- General rules for corrosion tests applicable for storage conditions 0 Introduction coated production articles or parts thereof. Depending on the purpose of the examinations, specimens Corrosion testing under storage conditions is carried out in order to : may be tested with or without wrappings and with or without temporary protective films. a) assess the corrosion resistance of different protective coatings to environments encountered under particular storage conditions; 2.2 Shape and dimensions b) compare the corrosion resistance of two or more pro- To minimize edge effects and to obtain representative corrosion, the surface area of the test specimens should be as tective coatings; large as possible and in any case not less than 50 cm2 determine the type and optimum thickness of a protec- (5 cm × 10 cm). c) tive coating and type of protective wrapping; If the coated articles used are smaller than 50 cm2 in area, d) evaluate the relationship between the results of testing specimens of the same kind may be combined to total the re- under laboratory and storage conditions. quired minimum surface area, but the results obtained will not necessarily be strictly comparable with those obtained on It involves exposure of coated test specimens to the action of specially prepared test specimens of the specified minimum corrosive factors encountered in storage and periodic observa- area. tion of the test specimens. The aggressiveness of corrosion in storage rooms depends 2.3 Preparation upon the humidity and temperature of the atmosphere and upon the action of other environmental factors which may Cliean the test specimens thoroughly before exposure to either be constant or may vary periodically or accidentally in a remove any contaminants that may affect the performance of particular microclimate. the coating system being tested. The cleaning method to be employed depends up