1、BRITISH STANDARD BS EN ISO 8502-12:2004 BS 7079-B12:2004 Incorporating Amendment No. 1 to BS 7079-B12:2003 (renumbers the BS as BS EN ISO 8502-12:2004) Preparation of steel substrates before application of paints and related products Tests for the assessment of surface cleanliness Part 12: Field met
2、hod for the titrimetric determination of water-soluble ferrous ions The European Standard EN ISO 8502-12:2004 has the status of a British Standard ICS 25.220.10 BS EN ISO 8502-12:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 4 March 20
3、03 BSI 3 February 2005 ISBN 0 580 41314 4 National foreword This British Standard is the official English language version of EN ISO 8502-12:2004. It is identical with ISO 8502-12:2003. The UK participation in its preparation was entrusted to Technical Committee STI/21, Surface preparation of steel,
4、 which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the
5、section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct applicatio
6、n. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor
7、 related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to v, a blank page, pages 1 to 4, an inside back cover and a ba
8、ck cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 15513 3 February 2005 Implementation of the European StandardEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO850212 December2004 I
9、CS25.220.10 Englishversion Preparationofsteelsubstratesbeforeapplicationofpaintsand relatedproductsTestsfortheassessmentofsurface cleanlinessPart12:Fieldmethodforthetitrimetric determinationofwatersolubleferrousions(ISO850212:2003) Prparationdessubjectilesdacieravantapplicationde peinturesetdeprodui
10、tsassimilsEssaispourapprcier lapropretdunesurfacePartie12:Mthodeinsitupour ladterminationtitrimtriquedesionsferreuxhydrosolubles (ISO850212:2003) VorbereitungvonStahloberflchenvordemAuftragenvon BeschichtungsstoffenPrfungenzurBewertungder OberflchenreinheitTeil12:Feldprfungzur titrimetrischenBestimm
11、ungvonwasserlslichen Eisenionen(ISO850212:2003) ThisEuropeanStandardwasapprovedbyCENon21December2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographi
12、calreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheC
13、entralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Sloveni
14、a,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO850212:2004
15、:EI NESO 58-20:21002( 4E) 2 Foreword The text of ISO 8502-12:2003 has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 8502-12:2004 by Technical Committee CEN/TC 139 “Paints and varnish
16、es“, 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 June 2005, and conflicting national standards shall be withdrawn at the latest by June 2005. According
17、 to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
18、Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 8502-12:2003 has been approved by CEN as EN ISO 8502-12:2004 without any modifications. ENISO850212:2004 Reference number ISO 8502-12:2003(E
19、) OSI 3002INTERNATIONAL STANDARD ISO 8502-12 First edition 2003-02-15 Preparation of steel substrates before application of paints and related products Tests for the assessment of surface cleanliness Part 12: Field method for the titrimetric determination of water-soluble ferrous ions Prparation des
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25、opale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.o gro We bwww.is.o groii ISO 3002 Allr ithgsr esedevrENISO850212:2004IS-2058 O21:(3002E) I SO 3002 All irthgs ersedevr iiiContents Page Foreword iv Introduction. v 1 Scope 1 2 Normative references 1 3 Princi
26、ple . 1 4 Reagents 2 5 Apparatus. 2 6 Removal of water-soluble contaminants from the surface. 2 7 Procedure. 2 8 Expression of results 3 9 Precision 3 10 Test report 3 ENISO850212:2004IS-2058 O21:(3002E) iv I SO 3002 All irthgs ersedevrForeword ISO (the International Organization for Standardization
27、) 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 been established has the right to be repr
28、esented 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 standardization. International Standards ar
29、e drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. 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 voting. Publication as an Internation
30、al 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 patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 8502-
31、12 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 8502 consists of the following parts, under the general title Preparation of steel substrates before application of paint
32、s and related products Tests for the assessment of surface cleanliness: Part 1: Field test for soluble iron corrosion products Technical Report Part 2: Laboratory determination of chloride on cleaned surfaces Part 3: Assessment of dust on steel surfaces prepared for painting (pressure-sensitive tape
33、 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 method) Part 6: Extraction of soluble contaminants for analysis The Bresle method Part 7: Field method
34、 for the determination of oil and grease 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 determination of water-soluble chloride Part 11: Field method for
35、the turbidimetric determination of water-soluble sulfate Part 12: Field method for the titrimetric determination of water-soluble ferrous ions Part 13: Field method for the determination of soluble salts by conductometric measurement At the time of publication of this part of ISO 8502, parts 7, 11 a
36、nd 13 were in preparation. ENISO850212:2004IS-2058 O21:(3002E) I SO 3002 All irthgs ersedevr vIntroduction The performance 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 fa
37、ctors 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, ISO 8502 and ISO 8503 have been prepared to provide methods of a
38、ssessing 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 Standards do not contain recommendations for the protective coat
39、ing 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 direct influence on the choice of protective coating to be applied and on its performance. Such recommendations are
40、 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 qualities specified are: compatible and appropriate both for the environmental conditions to which the steel will be exposed and for the prot
41、ective coating system to be used; within the capability of the cleaning procedure specified. The four International Standards referred to above deal with the following aspects of preparation of steel substrates: ISO 8501 Visual assessment of surface cleanliness; ISO 8502 Tests for the assessment of
42、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. There are a number of methods for the analysis of ferrous ions in solution. However,
43、most of these are for laboratory use and very few are suitable for field use, i.e. in conjunction with sampling in workshops, at building sites, on board ships, etc., often under severe environmental conditions. The proposed field method for ferrous ions and the corresponding methods of analysis tha
44、t have been developed for other contaminants (such as sulfate, chlorides, and oil and grease) are intended to be used in conjunction with the Bresle method for the removal of contaminants from a surface, ISO 8502-6. These methods of analysis provide results which, after application of a simple conve
45、rsion factor, indicate directly the amount of contaminants per unit surface area, usually expressed in mg/m 2 . The same method of analysis can also be used in conjunction with other contaminant extraction methods. ENISO850212:2004blank ENISO850212:2004INTENRATIONAL TSANDADR IS-2058 O21:(3002E)I SO
46、3002 All irthgs ersedevr 1Preparation of steel substrates before application of paints and related products Tests for the assessment of surface cleanliness Part 12: Field method for the titrimetric determination of water-soluble ferrous ions WARNING The method described in this part of ISO 8502 invo
47、lves drop titration with a solution of potassium dichromate. The small quantity of titrant solution and its low concentration are not likely to make it a hazard (e.g. by ingestion). Attention is drawn, however, to national and/or local legislation regarding possible environmental pollution hazards.
48、1 Scope This part of ISO 8502 describes a field method for the determination, by drop titration, of soluble ferrous ions on steel surfaces before and/or after surface preparation. The method is intended mainly for use in the assessment of contaminants on a surface. It is easy for unskilled personnel to carry out and it is sufficiently accurate for most practical purposes. 2 Normative refer
