ISO 8501-4-2006 Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Part 4 Initial su.pdf

1、 ISO 8501-4:2006(E/F) ICS 25.220.10 Price group XL / Groupe de prix XL ISO 2006 All rights reserved/Tous droits rservs ISO 8501-4:2006 INTERNATIONAL STANDARD NORME INTERNATIONALE Preparation of steel substrates before application of paints and related products Visual assessment of surface cleanlines

2、s Part 4: Initial surface conditions, preparation grades and flash rust grades in connection with high-pressure water jetting Prparation des subjectiles dacier avant application de peintures et de produits assimils valuation visuelle de la propret dun subjectile Partie 4: tats de surface initiaux, d

3、egrs de prparation et degrs de fleurette de rouille aprs dcapage leau sous haute pression Reference number Numro de rfrence ISO 8501-4:2006(E/F) ISO 2006 ISO 8501-4 First edition Premire dition 2006-12-15IMPORTANT The reference photo- graphs utilized for the assessment of steel surfaces when using t

4、his part of ISO 8501 are not included in this electronic file because the quality of their reproduction is subject to change when they are viewed on screen or printed out. It is important that only the photo- graphs contained in officially printed ver- sions of this part of ISO 8501, pur- chased fro

5、m ISO or from ISO member bodies or their dis- tributors, are used when carrying out assessments. IMPORTANT Les clichs photographi- ques reprsentatifs servant lvaluation visuelle des subjecti- les en acier laide de la prsente partie de lISO 8501 ne sont pas inclus dans le prsent fichier lec- tronique

6、 parce que la qualit de leur repro- duction ne peut tre garantie lorsquils sont affichs lcran ou imprims. Il est important que seuls les clichs photogra- phiques contenus dans les versions officielles de la pr- sente partie de lISO 8501, achetes auprs de lISO, des comits membres de lISO ou de leurs

7、dis- tributeurs, soient uti- liss lors des valua- tions. COPYRIGHT PROTECTED DOCUMENT DOCUMENT PROTG PAR COPYRIGHT ISO 2006 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 phot

8、ocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. / Droits de reproduction rservs. Sauf prescription diffrente, aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce

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17、entral ladresse donne ci-dessous. ISO 8501-4:2006(E/F) ISO 2006 All rights reserved/Tous droits rservs iiiPage English text 1 Texte franais 17 Deutscher Text.35 Photographs / Photographies / Photographische Vergleichsmuster ISO 8501-4:2006(E) ISO 2006 All rights reserved 1Contents Page Foreword 2 In

18、troduction4 1 Scope.7 2 Normative references.8 3 Terms and definitions 9 4 Initial surface conditions.10 5 Preparation grades.11 6 Flash rust grades .12 7 Procedure for the visual assessment of steel substrates .13 8 Photographs .13 Annex A (informative) Guidance on cleaning with water15 ISO 8501-4:

19、2006(E) 2 ISO 2006 All rights reservedForeword 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

20、 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 Electrote

21、chnical 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

22、 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 rig

23、hts. ISO shall not be held responsible for identifying any or all such patent rights. ISO 8501-4 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 8501-4:2006(E) ISO 2006 All

24、 rights reserved 3ISO 8501 consists of the following parts, under the general title Preparation of steel substrates before application of paints and related products Visual assessment of surface cleanliness: Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substra

25、tes after overall removal of previous coatings Informative Supplement to Part 1: Representative photographic examples of the change of appearance imparted to steel when blast- cleaned with different abrasives Part 2: Preparation grades of previously coated steel substrates after localized removal of

26、 previous coatings Part 3: Preparation grades of welds, cut edges and other areas with surface imperfections Part 4: Initial surface conditions, preparation grades and flash rust grades in connection with high-pressure water jetting ISO 8501-4:2006(E) 4 ISO 2006 All rights reservedIntroduction The p

27、erformance of protective coatings of paint and related products applied to steel is significantly affected by the state of the steel surface immediately prior to painting. The principal factors that are known to influence this performance are a) the presence of rust, mill scale and previous coatings

28、; b) the presence of surface contaminants, including salts, dust, oils and greases; c) the surface roughness. International standards ISO 8501, ISO 8502 and ISO 8503 have been prepared to provide methods of assessing these factors, while ISO 4628-3 provides, inter alia, guidance on evaluating the de

29、gradation of paint coatings by assessing the degree of rusting. ISO 8501, ISO 8502 and ISO 8503 do not contain recommendations for the protective systems to be applied to the steel surface. Neither do they contain recommendations for the preparation grades for specific situations even though surface

30、 quality can have a direct influence on the choice of protective coating 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 qu

31、alities specified are compatible and appropriate both for the environmental conditions to which the steel will be exposed and for the protective coating system to be used; compatible with any previous coatings remaining after cleaning; within the capability of the cleaning procedure specified. ISO 8

32、501-4:2006(E) ISO 2006 All rights reserved 5ISO 8501, ISO 8502 and ISO 8503 deal with aspects of preparation of steel substrates under the general heading Preparation of steel substrates before application of paints and related products. They have the following titles: ISO 8501 Visual assessment of

33、surface cleanliness; ISO 8502 Tests for the assessment of surface cleanliness; ISO 8503 Surface roughness characteristics of blast-cleaned steel substrates. Each of these International Standards is in turn divided into separate parts. This part of ISO 8501 identifies five initial surface conditions,

34、 three of them applicable to degraded paint coatings and two of them to damaged pre-fabrication (shop) primer coatings; three preparation grades for each initial surface condition, after partial or full removal of previous paint coatings by high-pressure water jetting; three flash rust grades after

35、pretreatment by high-pressure water jetting. This part of ISO 8501 is intended to be a tool for the visual assessment of initial surface conditions, preparation grades and flash rust grades in connection with high-pressure water jetting. It includes 23 representative photographic examples. The photo

36、graphs showing the five initial surface conditions and each preparation grade are reproduced by permission of Hempel A/S. The photographs representing each of the three flash rust grades are reproduced by permission of International Paint, Ltd. ISO 8501-4:2006(E) 6 ISO 2006 All rights reservedNOTE T

37、his part of ISO 8501 contains the text in two of the three official languages of ISO, English and French. It also contains the text in German, published under the responsibility of DIN. INTERNATIONAL STANDARD ISO 8501-4:2006(E) ISO 2006 All rights reserved 7Preparation of steel substrates before app

38、lication of paints and related products Visual assessment of surface cleanliness Part 4: Initial surface conditions, preparation grades and flash rust grades in connection with high-pressure water jetting 1 Scope This part of ISO 8501 specifies a series of preparation grades for steel surfaces after

39、 removal/partial removal of water-soluble contaminants, rust, previous paint coatings and foreign matter by high-pressure water jetting. The various grades are defined by written descriptions together with photographs that are representative examples within the tolerances for each grade as described

40、 in words. In addition, this part of ISO 8501 specifies both initial surface conditions and after-cleaning flash rust grades, also defined by written descriptions together with representative photographic examples. NOTE 1 Examples of foreign matter are salt, grime, dirt, mill scale, oil, grease and

41、marine growth, e.g. algae. This part of ISO 8501 relates the cleanliness of the surface to its visual appearance. In many instances, this is sufficient for the purpose but, for coatings likely to be exposed to severe environments, such as water immersion and continuous condensation conditions, consi

42、deration should be given to testing for soluble salts and other invisible contaminants on the ISO 8501-4:2006(E) 8 ISO 2006 All rights reservedvisually clean surface by the physical and chemical methods which form the subjects of the various parts of ISO 8502. The roughness characteristics of the su

43、rface should also be considered by reference to ISO 8503, although it must be noted that preparation by high- pressure water jetting does not create a profile or significantly change an existing profile. NOTE 2 Water pressure, water volume, nozzle design, stand-off distance and traverse rate are fac

44、tors which will affect the efficiency of removal of contaminants such as water-soluble matter, rust and paint coatings. The removal efficiency also depends on whether detergents are being used in the cleaning process. If so, rinsing afterwards with clean water is necessary. 2 Normative references Th

45、e 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 4628-3, Paints and varnishes Evaluation of degr

46、adation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 3: Assessment of degree of rusting ISO 8501-1, Preparation of steel substrates before application of paints and related products Visual assessment of surface cleanliness Part 1: Ru

47、st grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings ISO 8501-4:2006(E) ISO 2006 All rights reserved 93 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 water jetting (p

48、referred) hydrojetting aquajetting water blast-cleaning (deprecated) hydroblasting (deprecated) aquablasting (deprecated) cleaning a steel substrate by directing a high-speed jet of water onto its surface 3.1.1 high-pressure water jetting water jetting that involves the use of water pressurized to a

49、bove 70 MPa NOTE Water jetting using higher pressures might remove loose mill scale from a steel surface, but it does not impart a surface profile to the substrate. 3.2 initial surface condition visual appearance of a coated steel surface which has been degraded or damaged by rusting, blistering or flaking 3.3 preparation grade visual appear