1、BRITISH STANDARDBS EN ISO 8502-6:2006 BS 7079-B6: 2006Preparation of steel substrates before application of paints and related products Tests for the assessment of surface cleanliness Part 6: Extraction of soluble contaminants for analysis The Bresle methodThe European Standard EN ISO 8502-6:2006 ha
2、s the status of a British StandardICS 25.220.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 8502-6:2006This British Standard was publis
3、hed under the authority of the Standards Policy and Strategy Committee on 30 November 2006 BSI 2006ISBN 0 580 49636 8National forewordThis British Standard was published by BSI. It is the UK implementation of EN ISO 8502-6:2006. It supersedes BS EN ISO 8502-6:2000 which is withdrawn.The UK participa
4、tion in its preparation was entrusted to Technical Committee STI/21, Surface preparation of steel. A list of organizations represented on STI/21 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible
5、for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 8502-6July 2006ICS 25.220.10 Supersedes EN ISO 8502-6:1999 English VersionPrepar
6、ation of steel substrates before application of paints andrelated products - Tests for the assessment of surfacecleanliness - Part 6: Extraction of soluble contaminants foranalysis - The Bresle method (ISO 8502-6:2006)Prparation des subjectiles dacier avant application depeintures et de produits ass
7、imils - Essais pour apprcierla propret dune surface - Partie 6: Extraction descontaminants solubles en vue de lanalyse - Mthode deBresle (ISO 8502-6:2006)Vorbereitung von Stahloberflchen vor dem Auftragen vonBeschichtungsstoffen - Prfungen zum Bewerten derOberflchenreinheit - Teil 6: Lsen von wasser
8、lslichenVerunreinigungen zur Analyse; Bresle-Verfahren (ISO8502-6:2006)This European Standard was approved by CEN on 29 June 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standar
9、d without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other langua
10、ge made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,German
11、y, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManage
12、ment Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 8502-6:2006: EForeword This document (EN ISO 8502-6:2006) has been prepared by Technical Committee ISO/TC 35 “Paints and varnis
13、hes“ in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes“, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2007, and conflic
14、ting national standards shall be withdrawn at the latest by January 2007. This document supersedes EN ISO 8502-6:1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, C
15、yprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 850
16、2-6:2006 has been approved by CEN as EN ISO 8502-6:2006 without any modifications. EN ISO 8502-6:2006Reference numberISO 8502-6:2006(E)INTERNATIONAL STANDARD ISO8502-6Second edition2006-07-01Preparation of steel substrates before application of paints and related products Tests for the assessment of
17、 surface cleanliness Part 6: Extraction of soluble contaminants for analysis The Bresle method Prparation des subjectiles dacier avant application de peintures et de produits assimils Essais pour apprcier la propret dune surface Partie 6: Extraction des contaminants solubles en vue de lanalyse Mthod
18、e de Bresle EN ISO 8502-6:2006ii iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Principle. 1 4 Apparatus and materials 2 5 Procedure 2 6 Test report . 3 Annex A (normative) Leak test for type testing of patches . 6 EN ISO 8502-6:2006iv Foreword ISO (the Internat
19、ional 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 bee
20、n 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 stand
21、ardization. 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
22、 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
23、 such patent rights. ISO 8502-6 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. This second edition cancels and replaces the first edition (ISO 8502-6:1995), which has been rev
24、ised to clarify the procedure (see 5.6 and 5.7). ISO 8502 consists of the following parts, under the general title Preparation of steel substrates before application of paints and related products Tests for the assessment of surface cleanliness: Part 2: Laboratory determination of chloride on cleane
25、d 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 (ion detection tube
26、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 11: Field method for the turbidimetric determination of water-
27、soluble sulfate Part 12: Field method for the titrimetric determination of water-soluble ferrous ions Parts 1 and 10 have been withdrawn. Part 7 (Field method for the determination of oil and grease) is in preparation. EN ISO 8502-6:2006vIntroduction The performance of protective coatings of paint a
28、nd 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 and mill scale; b) the presence of surface contaminants, including salts, du
29、st, oils and greases; c) the surface profile. International Standards ISO 8501, ISO 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 capabil
30、ities of each in attaining specified levels of cleanliness. These International Standards do not contain recommendations for the protective coating systems to be applied to the steel surface. Neither do they contain recommendations for the surface quality requirements for specific situations, even t
31、hough surface 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 ensur
32、e that the qualities 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; within the capability of the cleaning procedure specified. The four International Standards referred to above deal
33、 with the following aspects of preparation of steel substrates: ISO 8501 Visual assessment 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 the
34、se International Standards is in turn divided into separate parts. This is one of a number of parts of ISO 8502 that specify tests for the assessment of surface cleanliness. In connection with such tests, there are several methods for the extraction, for analysis, of soluble contaminants on surfaces
35、 to be painted. Some of these methods are based on the swabbing of comparatively large test surfaces. This technique provides average values of the contamination present, but it might conceal localized concentrations of contaminants. Also, swabbing might not ensure sufficient penetration to dissolve
36、 all of the deep-seated contamination such as ferrous salts. There are other methods, however, which use small cells for the liquid used to remove and collect the surface contaminants. The cells (rigid or flexible) are attached to test surfaces where soluble contaminants could be expected, e.g. wher
37、e pitting has occurred. This technique usually provides more accurate, point values of the contamination present. This part of ISO 8502 describes a simple, inexpensive field test using flexible cells in the form of adhesive patches designed to be filled with solvent. The method was originally develo
38、ped by a Swedish scientist, Dr. A. Bresle. EN ISO 8502-6:2006blank1Preparation of steel substrates before application of paints and related products Tests for the assessment of surface cleanliness Part 6: Extraction of soluble contaminants for analysis The Bresle method 1 Scope This part of ISO 8502
39、 describes a method of extracting, for analysis, soluble contaminants from a surface by use of flexible cells in the form of adhesive patches which can be attached to any surface, regardless of its shape (flat or curved) and its orientation (facing in any direction, including downwards). The method
40、described is suitable for use in the field to determine the presence of soluble contaminants before painting or a similar treatment. This part of ISO 8502 does not cover the subsequent analysis of the contaminants that have been dissolved off. Methods of analysis suitable for field use are described
41、 in other parts of ISO 8502. 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) applie
42、s. ISO 554, Standard atmospheres for conditioning and/or testing Specifications ISO 8501-1, 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
43、substrates after removal of previous coatings ISO 8503-2, Preparation of steel substrates before application of paints and related products Surface roughness characteristics of blast-cleaned steel substrates Part 2: Method for the grading of surface profile of abrasive blast-cleaned steel Comparator
44、 procedure ISO/IEC Guide 2, Standardization and related activities General vocabulary 3 Principle An adhesive patch with a central compartment designed to hold a solvent is attached to the surface from which soluble contaminants are to be removed. The solvent is injected into the compartment by mean
45、s of a syringe, and then sucked back into the syringe. This operation is repeated a number of times. The solvent (now containing contaminants dissolved off the test surface) is then transferred to a suitable vessel for analysis. EN ISO 8502-6:20062 4 Apparatus and materials 4.1 Adhesive patch, the b
46、ody of which is made of ageing-resistant, flexible material with closed pores, e.g. polyethylene foam, and with a hole punched in the centre. The punched-out material is kept in the hole as a reinforcement until the patch is used. One side of the patch is coated with a thin elastomer film. The other
47、 side is coated with adhesive and covered by a removable protective sheet made of paper. NOTE The hole and the outer edge of the patch may be any shape, e.g. circular, rectangular, elliptical, etc. The thickness of the patch shall be 1,5 mm 0,3 mm. The width of the adhesive rim between the hole and
48、the outer edge of the patch shall be at least 5 mm. Patches with one of the standard compartment sizes specified in Table 1 are called standard patches. It is essential that the adhesive patch is leaktight. An easily performed leak test has therefore been developed for type testing (see Annex A). Tw
49、elve patches of the same size shall be tested, and at least eight of them shall pass the test. The leak test shall be carried out by an accredited laboratory and the result stated in a test report. For terms and definitions in this context, see ISO/IEC Guide 2. Table 1 Standard patches Patch size Compartment area (mm2) A-0155 A-0310 A-0625 A-1250 A-2500 1155 2 1310 3 1625 6 1 250 13 2 500 25 4.2 Reusable syringe: max. cylinder volume: 8 ml max. needle diameter: 1 mm max. needle
