SIST EN ISO 8403:1999
(Main)Metallic coatings - Coatings anodic to the substrate - Rating of test specimens subjected to corrosion tests (ISO 8403:1991)
Metallic coatings - Coatings anodic to the substrate - Rating of test specimens subjected to corrosion tests (ISO 8403:1991)
Metallische Überzüge - Überzüge, die gegenüber dem Grundwerkstoff anodisch sind - Bewertung der Proben nach Korrosionsprüfungen (ISO 8403:1991)
In dieser Internationalen Norm ist ein Verfahren zur Bewertung des Zustandes vonProben mit Überzug festgelegt, die zu Prüfzwecken korrodierenden Umgebungen ausgesetzt wurden. Die Norm basiert auf Erfahrungen mit dem Verfahren mit genormten Prüfplatten, 10 cm x 15 cm groß, die bei einer Freilandprüfung auf einem Gestell natürlichen Atmosphären ausgesetzt wurden. Zur Bewertung ähnlicher Platten, die jedoch Schnellkorrosionsprüfungen ausgesetzt wurden, müssen besondere Maßnahmen getroffen werden.
Revetements métalliques - Dépôts électrolytiques anodiques par rapport au substrat - Cotation des éprouvettes soumises aux essais de corrosion (ISO 8403:1991)
La CEI 62024-1:2008 spécifie les caractéristiques électriques et les méthodes de mesure pour l'inductance pastille de l'ordre du nanohenry qui est normalement utilisée dans la gamme des hautes fréquences (supérieures à 100 kHz). Par rapport à l'édition précédente, les principales modifications techniques sont les suivantes:
a) tailles 0402 ajoutées dans le Tableau 1 et le Tableau 2;
b) contenu de 4.4 révisé pour en faciliter la compréhension;
c) erreurs de 3.1.4.2 corrigées.
Kovinske prevleke – Anodno nanesene prevleke na podlago - Vrednotenje vzorcev s korozijskimi preskusi (ISO 8403:1991)
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kovinske prevleke – Anodno nanesene prevleke na podlago - Vrednotenje vzorcev s korozijskimi preskusi (ISO 8403:1991)Metallische Überzüge - Überzüge, die gegenüber dem Grundwerkstoff anodisch sind - Bewertung der Proben nach Korrosionsprüfungen (ISO 8403:1991)Revetements métalliques - Dépôts électrolytiques anodiques par rapport au substrat - Cotation des éprouvettes soumises aux essais de corrosion (ISO 8403:1991)Metallic coatings - Coatings anodic to the substrate - Rating of test specimens subjected to corrosion tests (ISO 8403:1991)25.220.40Kovinske prevlekeMetallic coatingsICS:Ta slovenski standard je istoveten z:EN ISO 8403:1995SIST EN ISO 8403:1999en01-oktober-1999SIST EN ISO 8403:1999SLOVENSKI
STANDARD
SIST EN ISO 8403:1999
SIST EN ISO 8403:1999
SIST EN ISO 8403:1999
SIST EN ISO 8403:1999
SIST EN ISO 8403:1999
INTERNATIONAL IS0 STANDARD 8403 First edition 1991-10-01 Metallic coatings - Coatings anodic to the substrate - Rating of test specimens subjected to corrosion tests Rev&emen ts m6 talliques - D&6 ts tYec trolytiques anodiques par rapport substra t - Co ta tion des kprouvettes soumises aux essais de corrosion Reference number IS0 8403 : 1991 (El SIST EN ISO 8403:1999
ISO8403:1991(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 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, govern- mental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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. International Standard IS0 8403 was prepared by Technical Committee lSO/TC Metallic and other inorganic coa tings, Sub-Committee SC 7 , Corrosion tests. 107, Annex A forms an integral part of this International Standard. 0 IS0 1991 All rights reserved. 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 the publisher. International Organization for Standardization Case posta le 56 l CH-121 1 Geneve 20 l Switze rland Printed in Switzerland ii SIST EN ISO 8403:1999
INTERNATIONAL STANDARD IS08403 : 1991 (El Metallic coatings - Coatings anodic to the substrate - Rating of test specimens subjected to corrosion tests 1 Scope 1.1 This International Standard specifies a method of evaluating the condition of coated test specimens that have been exposed to corrosive environments for test purposes. It is based on experience of the method with standard 10 cm x 15 cm test panels, exposed on racks at outdoor test sites in natural atmospheres. Special precautions must be taken when rating similar panels exposed to accelerated corrosion tests. Any modifications needed to adapt the method to rating actual production parts are not considered in this International Standard. 1.2 This method is applicable only to protective coatings that are anodic to the substrate, for example zinc coatings on steel or tin coatings on copper, with or without conversion coatings. It is not intended for use with coatings cathodic to the substrate, for which a rating system is specified in IS0 4540. NOTE - This specification relates to process control as applicable to specially prepared test panels. It is not intended for use in rating manufactured items as artefacts. This will be covered in a subsequent International Standard. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 2064 : 1980, Metallic and other non-organic coatings - Definitions and conventions concerning the measurement of thickness. IS0 4540 : 1980, Metallic coatings - Coatings cathodic to the substrate - Rating of electroplated test specimens subjected to corrosion tests. IS0 8044 : 1989, Corrosion of metals andalloys - Vocabulary. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 appearance rating: The severity of possible corrosion defects on the surface of the coating expressed by a letter code from A to l-l. 32 corrosion rating: The amount of corroded area of the surface of the coating expressed by a numerical value. 3.3 corrosion grade: The combined rating for severity and amount of corrosion defects on the coating. 3.4 corrosion : Physicochemical interaction between a metal and its environment which results in changes in the properties of the metal and which may often lead to impairment of the function of the metal, the environment or the technical system of which these form a part. NOTE - This interaction is usually of an electrochemical nature. 3.5 corrosive environment: Environment that contains one or more corrosive agents. 3.6 corrosive system: System consisting of a metal and all parts of its environment which influence corrosion. NOTE - Part of the environment may be coating, surface layer, Corrosion effect of the coating and in corrosion damage of the coating additional electrode, etc. 3.7 corrosion defect: the basis metal, resulting and finally the basis meta NOTES 1 corrosion effect: Chang rosion. e in the corrosion system caused by cor- 2 corrosion damage: Corrosion effect which is considered detrimental to the function of the metal, the environment or the technical system of which these form a part. 3.8 corrosion product: Substance formed by a change of state as a result of corrosion. 3.8.1 Where corrosion has occurred, the corrosion products may be derived from the metal coating as well as from the basis metal. The corrosion products may vary considerably in ap- pearance and distribution, depending on both the coating and the basis metal and the corrosive medium. General corrosion produces a deposit that is more or less equally dispersed all over the metal surface while localized corrosion produces nodules of corrosion products over cavities. 1 SIST EN ISO 8403:1999
IS0 8403 : 1991 (E) 3.8.2 In the following, some usual forms of corrosion and cor- rosion products which influence appearance are described. 3.8.2.1 staining : Change of appearance of a surface by oxidation, formation of sulfides, etc., with or without slight change of brightness. 3.8.2.2 dulling: Change of appearance of a surface by corro- sion attack in such a way that the brightness of the surface is reduced without forming any directly obvious layer of corrosion products. 3.8.2.3 corrosion products from the coatings: For example white corrosion products. NOTE - white corrosion products : Corrosion products on a surface in the form of white to greyish-white, porous deposits on, for example, zinc, tin, and their alloys. Corrosion products on zinc are quite easily formed in humid saline atmospheres and consist mainly of basic zinc salts. 3.8.2.4 corrosion products from the basis metal; patina/USA: for example rust or verdigris. NOTES 1 rust: Visi
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