1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1General introduction to standards for preparation of steel substrates before application of paints and related pr
2、oductsBS 7079:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 00:52, Uncontrolled Copy, (c) BSIBS 7079:2009 BritiSh StandardPublishing and copyright informationthe BSi copyright notice displayed in this document indicates when the document was last issued. BSi 2008iSBn 978 0 58
3、0 59688 9iCS 25.220.10the following BSi references relate to the work on this standard: Committee reference Sti/21 draft for comment 08/30169246 dCPublication historyFirst published as BS 7079-0:1990 Second edition december 2008Amendments issued since publicationAmd. No. Date Text affected Licensed
4、Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 00:52, Uncontrolled Copy, (c) BSIBritiSh Standard BSI 2008 iBS 7079:2009ContentsForeword ii1 Scope 12 normative references 13 terms and definitions 14 List of standards 55 Further information 8Bibliography 12List of tablestable 1 Sti/21 Standa
5、rds 5Summary of pagesthis document comprises a front cover, an inside front cover, pages i to ii, pages 1 to 12, an inside back cover and a back cover.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 00:52, Uncontrolled Copy, (c) BSIBS 7079:2009ii BSI 2008BritiSh StandardForewordPub
6、lishing informationthis British Standard is published by BSi and came into effect on 31 december 2008. it was prepared by technical Committee Sti/21, Surface preparation of steel. a list of organizations represented on this committee can be obtained on request to its secretary.Information about this
7、 documentthis revision of BS 70790 incorporates changes made necessary by the publication of BS En iSO standards with single identifying numbers, where previously they were dual-numbered. Contractual and legal considerationsthis publication does not purport to include all the necessary provisions of
8、 a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 00:52, Uncontrolled Copy, (c) BSIBritiSh Standard BSI 2008 1BS 7079:20091 Scopethis Britis
9、h Standard provides a general introduction to all the steel surface preparation standards. it gives general information on all the separate groups of standards, along with a complete listing of all the published standards that cover abrasive blast-cleaning, hand- and power-tool cleaning and flame cl
10、eaning of steel substrates.this British Standard also includes definitions that are applicable to all the standards listed. additional definitions, specific to certain processes, are given in the respective standards.to help the user, all of the older BS 7079 references are given so that the new and
11、/or updated standards can easily be found, as (although some remain dual-numbered) many are now only known by their BS En iSO reference.although the surface preparation standards are primarily intended for use with hot-rolled steel, abrasive blast-cleaning methods, in particular, might also be appli
12、cable to the surface preparation of cold-rolled steel of sufficient thickness to withstand any deformation caused by the impact of the abrasive. the standards are not applicable to non-ferrous substrates such as aluminium or galvanized or electroplated steel.2 Normative referencesthe following refer
13、enced 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.BS En iSO 4618:2006, Paints and varnishes Terms and definitions3 Term
14、s and definitionsFor the purposes of this British Standard, the terms and definitions given in BS En iSO 4618:2006 and the following apply.NOTE 1 A confusing aspect of the terminology in this field is the tendency to use the term “coating” in three senses: for the material applied, the action of app
15、lying the material, and the resulting film. In this Standard “coating” is used only for the action, “coat” is used for the resulting film and “coating material” for the material used. NOTE 2 Where” BS EN ISO ” appears under a definition, it indicates that the definition is taken from BS EN ISO .3.1
16、abrasive blast-cleaning impingement of a high-kinetic energy stream of an abrasive on the surface to be preparedBS En iSO 4618:2006NOTE 1 For details on commonly used abrasives (including terms belonging to a full description) see BS EN ISO 8504-2, the BS EN ISO 11124 series and the BS EN ISO 11126
17、series.NOTE 2 Main groups of abrasive blast-cleaning methods are dry abrasive blast-cleaning and wet abrasive blast-cleaning. For details see BS EN ISO 8504-2.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 00:52, Uncontrolled Copy, (c) BSIBS 7079:20092 BSI 2008BritiSh Standard3.2
18、adhesive strength sum total of the forces of attachment between a dry film and a substrate BS En iSO 4618:20063.3 anti-corrosive paintcoating material used to retard the corrosion of metals 3.4 blast primercoating material that is applied to a steel substrate directly after abrasive blast-cleaningBS
19、 En iSO 4618:20063.5 blisteringformation of dome-shaped projections in the dry film of coating material by local loss of adhesion and lifting of the film from the underlying surface NOTE Such projections can contain liquid, vapour or gas.3.6 cleaned surfacesurface from which contaminants have been r
20、emoved 3.7 coatcontinuous layer of a coating material resulting from a single applicationBS En iSO 4618:20063.8 contaminated surface surface on which foreign matter is present that can be detrimental to the adhesion and/or durability of a protective coatingNOTE Typical contaminants include dust, rus
21、t, laminated rust scale, loose mill scale, oil, grease, welding flux, spatter and slag, soluble salts and other chemical contaminants.3.9 corrosion process of deterioration by chemical, electrochemical or microbiological reactions resulting from exposure to the environment BS En iSO 4618:20063.10 de
22、-scalingremoval of mill scale or laminated rust from steel substrates3.11 durabilityproperty of a coating to resist the deleterious effects of its environmentBS En iSO 4618:20063.12 feather edgingtapering, by abrading, of the thickness of the edge of a paint film prior to repainting in order to obsc
23、ure overlapsBS En iSO 4618:2006NOTE ”Bevelled back” is also used to describe such tapering. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 00:52, Uncontrolled Copy, (c) BSIBritiSh Standard BSI 2008 3BS 7079:20093.13 flame cleaning process by which a reducing flame is applied to a
24、surface, followed by manual or mechanical cleaning operationsBS En iSO 4618:20063.14 flash rust rapid formation of a very thin layer of rust on a steel substrate after abrasive blast-cleaning or water jetting 3.15 gritparticles that are predominantly angular, that have fractured faces and sharp edge
25、s and that are less than half-round in shapeBS En iSO 11124-1:1997, BS En iSO 11126-1:19973.16 hackles thin raised slivers of steel, still attached to the substrate, which are caused by the impact of abrasives on a steel surface during blast-cleaning and which sometimes protrude above the other peak
26、sBS En iSO 8503-1:19953.17 hand-tool cleaning cleaning or preparing steel substrates by the use of hand tools, without power assistanceNOTE Chipping hammers, hand scrapers, hand wire brushes, abrasive papers and plastic fleece with embedded abrasive are generally used. Hand-tool cleaning is sometime
27、s carried out initially in order to remove relatively loose contaminants prior to the use of power tools.3.18 high-pressure water jettingwater jetting that involves the use of water pressurized to above 70 MPaNOTE Water jetting using higher pressures might remove loose mill scale from a steel surfac
28、e, but it does not impart a surface profile to the substrate.BS En iSO 8501-4:20063.19 machine abrading surface preparation procedure comprising cleaning by thorough mechanical roughening and, if necessary, by rotating wire brushes, possibly supported by the application of needle guns 3.20 mill scal
29、elayer of iron oxides formed during the hot rolling of steelBS En iSO 4618:20063.21 pittingformation, due to corrosion, of small cavities in a steel substrate Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 00:52, Uncontrolled Copy, (c) BSIBS 7079:20094 BSI 2008BritiSh Standard3.22
30、 power-tool cleaning cleaning or preparing steel substrates by the use of power-assisted hand tools, but excluding blast-cleaningNOTE Rotary de-scalers, rotary wire brushes, sanding machines, sanding discs, rotary abrasive-coated paper wheels (flap wheels), abrasive grinders, plastic fleece with emb
31、edded abrasive, chipping hammers and needle guns, driven by electric or pneumatic power, are examples of equipment generally used.3.23 pre-fabrication primerfast-drying primer that is applied to blast-cleaned steel to protect it during fabrication of a structure while still allowing the steel to be
32、weldedBS En iSO 4618:20063.24 preparation gradedegree of visual cleanliness of a steel surface after corrosion products and/or contaminants have been removed by a preparation methodBS En iSO 4618:20063.25 primary profile original surface profile prior to surface preparation 3.26 priming coatfirst co
33、at of a coating systemBS En iSO 4618:20063.27 rogue peaksisolated peaks, substantially higher than the surrounding peaks, normally caused by the presence of over-sized abrasive in the abrasive mixture used during blast cleaning with grit abrasivesBS En iSO 8503-1:19953.28 rust grade degree of mill s
34、cale and rust on a steel surface prior to cleaningBS En iSO 4618:20063.29 secondary profilesurface profile resulting from the effect of surface preparation on the primary profile 3.30 shop primerprotective coating material for application in the workshop to a component that is subsequently to be fin
35、ished on siteBS En iSO 4618:2006Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 00:52, Uncontrolled Copy, (c) BSIBritiSh Standard BSI 2008 5BS 7079:20093.31 shotparticles that are predominantly round, that have a length of less than twice the maximum particle width and that do not
36、have edges, broken faces or other sharp surface defectsBS En iSO 11124-1:1997, BS En iSO 11126-1:1997 3.32 surface profilemicro-roughness of a surface, generally expressed as the average height of the major peaks relative to the major valleys3.33 surface profile comparatorspecimen surface of known a
37、verage profile, representing a particular abrasive blast-cleaning process3.34 water jettingcleaning a steel substrate by directing a high-speed jet of water onto its surfaceNOTE This definition is identical to that in BS EN ISO 8501-4:2006 but the various alternative terms have been omitted.4 List o
38、f standardsthe British Standards for preparation of steel substrates before application of paints and related products are listed in table 1.table 1 STI/21 StandardsPrimary identifier 2nd/old referenceTitle (or Part title)BS 7079:2008 7079-0 Preparation of steel substrates before application of pain
39、ts and related products introductionBS En iSO 8501 parts Preparation of steel substrates before application of paints and related products Visual assessment of surface cleanliness Part 1:2007 7079-a1, 7079-a1 Supplement 1rust grades and preparation grades of uncoated steel substrates and of steel su
40、bstrates after overall removal of previous coatingsPart 2:2001 7079-a2 Preparation grades of previously coated steel substrates after localized removal of previous coatingsPart 3:2007 7079-a3 Preparation grades of welds, edges and other areas with surface imperfectionsPart 4:2006 7079-a4 initial sur
41、face conditions, preparation grades and flash rust grades in connection with high-pressure water jettingLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 00:52, Uncontrolled Copy, (c) BSIBS 7079:20096 BSI 2008BritiSh Standardtable 1 STI/21 Standards (continued)Primary identifier 2nd/
42、old referenceTitle (or Part title)BS En iSO 8502 parts Preparation of steel substrates before application of paints and related products tests for the assessment of surface cleanliness Part 2:2005 7079-B2 Laboratory determination of chloride on cleaned surfacesPart 3:2000 7079-B3 assessment of dust
43、on steel surfaces prepared for painting (pressure-sensitive tape method)Part 4:2000 7079-B4 Guidance on the estimation of the probability of condensation prior to paint applicationPart 5:2004 7079-B5 Measurement of chloride on steel surfaces prepared for painting (ion detection tube method)Part 6:20
44、06 7079-B6 Extraction of soluble contaminants for analysis the Bresle methodPart 8:2004 7079-B8 Field method for the refractometric determination of moisturePart 9:2001 7079-B9 Field method for the conductometric determination of water-soluble saltsPart 11:2006 7079-B11 Field method for the turbidim
45、etric determination of water-soluble sulfatePart 12:2004 7079-B12 Field method for the titrimetric determination of water-soluble ferrous ionsBS En iSO 8503 parts Preparation of steel substrates before application of paints and related products Surface roughness characteristics of blast-cleaned stee
46、l substrates Part 1:1995 7079-C1 Specifications and definitions for iSO surface profile comparators for the assessment of abrasive blast-cleaned surfacesPart 2:1995 7079-C2 Method for the grading of surface profile of abrasive blast-cleaned steel Comparator procedurePart 3:1995 7079-C3 Method for th
47、e calibration of iSO surface profile comparators and for the determination of surface profile Focusing microscope procedurePart 4:1995 7079-C4 Method for the calibration of iSO surface profile comparators and for the determination of surface profile Stylus instrument procedurePart 5:2004 7079-C5 rep
48、lica tape method for the determination of the surface profileBS En iSO 8504 parts Preparation of steel substrates before application of paints and related products Surface preparation methodsPart 1:2001 7079-d1 General principlesPart 2:2001 7079-d2 abrasive blast-cleaningPart 3:2001 7079-d3 hand- an
49、d power-tool cleaningLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 00:52, Uncontrolled Copy, (c) BSIBritiSh Standard BSI 2008 7BS 7079:2009table 1 STI/21 Standards (continued)Primary identifier 2nd/old referenceTitle (or Part title)BS En iSO 11124 parts Preparation of steel substrates before application of paints and related products Specifications for metallic blast-cleaning abrasives Part 1:1997 7079-E1 General introduction and classificationPart 2:1997 7079-E2 Chille
