ISO-8502-8-2001.pdf
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1、INTERNATIONAL STANDARD ISO 8502-8 First edition 2001-08-01 Reference number ISO 8502-8:2001(E) ISO 2001 Preparation of steel substrates before application of paints and related products Tests for the assessment of surface cleanliness Part 8: Field method for the refractometric determination of moist
2、ure Prparation des subjectiles dacier avant application de peintures et de produits assimils Essais pour apprcier la propret dune surface Partie 8: Mthode in situ pour la dtermination rfractomtrique de lhumidit ISO 8502-8:2001(E) ii ISO 2001 All rights reserved PDF disclaimer This PDF file may conta
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4、ity of not infringing Adobes 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 para
5、meters 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 2001 All rights reserved. Unless otherwi
6、se specified, no part of this publication may be reproduced or utilized in any form or by any means, elec- tronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs mem- ber body in the country of the requester. ISO copyrig
7、ht office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ISO 8502-8:2001(E) ISO 2001 All rights reserved iii ContentsPage 1Scope .1 2Normative references .1 3Principle 1 4Reagents 1 5Apparatus .2 6Procedure
8、.2 7Expression of results 3 8Precision .4 9Test report 6 -,-,- ISO 8502-8:2001(E) iv ISO 2001 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 Standard
9、s 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
10、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 3. Draft International Standards adopted by t
11、he 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 part of ISO 8502 may be the subject of pate
12、nt rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 8502-8 was prepared by Technical Committee ISO/TC 35,Paints and varnishes, Subcommittee SC 12,Preparation of steel substrates before application of paints and related products. ISO
13、8502 consists of the following parts, under the general titlePreparation of steel substrates before application of paints and related products Tests for the assessment of surface cleanliness: Part 1: Field test for soluble iron corrosion productsTechnical Report Part 2: Laboratory determination of c
14、hloride on cleaned surfaces Part 3: Assessment of dust on steel surfaces prepared for painting (pressure-sensitive tape method) Part 4: Guidance on the estimation of the probability of condensation prior to paint application Part 5: Measurement of chloride on steel surfaces prepared for painting (io
15、n detection tube method) Part 6: Extraction of soluble contaminants for analysis The Bresle method Part 8: Field method for the refractometric determination of moisture Part 9: Field method for the conductometric determination of water-soluble salts Part 10: Field method for the titrimetric determin
16、ation of water-soluble chloride Part 12: Field method for the titrimetric determination of water-soluble ferrous ions The following parts are in the process of preparation: Part 7: Field method for determination of oil and grease Part 11: Field method for the turbidimetric determination of water-sol
17、uble sulfate Part 13: Field method for the determination of soluble salts by conductometric measurement -,-,- ISO 8502-8:2001(E) ISO 2001 All rights reserved v Introduction The performance of protective coatings of paint and related products applied to steel is significantly affected by the state of
18、 the steel surface immediately prior to painting. The principal factors that are known to influence this performance are: a)the presence of rust and mill scale; b)the presence of surface contaminants, including salts dust, oils and greases; c)the surface profile. International Standards ISO 8501, IS
19、O 8502 and ISO 8503 have been prepared to provide methods of assessing these factors, while ISO 8504 provides guidance on the preparation methods that are available for cleaning steel substrates, indicating the capabilities of each in attaining specified levels of cleanliness. These International St
20、andards do not contain recommendations for the protective coating system to be applied to the steel surface. Neither do they contain recommendations for the surface quality requirements for specific situations even though surface quality can have a direct influence on the choice of protective coatin
21、g to be applied and on its performance. Such recommendations are found in other documents such as national standards and codes of practice. It will be necessary for the users of these International Standards to ensure that the qualities specified are: compatible and appropriate both for the environm
22、ental conditions to which the steel will be exposed and for the protective coating system to be used; within the capability of the cleaning procedure specified. The four International Standards referred to below deal with the stated aspects of preparation of steel substrates: ISO 8501 Visual assessm
23、ent of surface cleanliness; ISO 8502 Tests for the assessment of surface cleanliness; ISO 8503 Surface roughness characteristics of blast-cleaned steel substrates; ISO 8504 Surface preparation methods. Each of these International Standards is in turn divided into separate parts. The protective prope
24、rties of paints and related products depend on the type of coating system that is used and on the amount of moisture (often in microscopic layers of water) on the steel surface when the coating is applied. In sub-clause 5.2 of ISO 12944-7:1998,Paints and varnishes Corrosion protection of steel struc
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