EN ISO 12944-6-1998 en Paints and Varnishes - Corrosion Protection of Steel Structures by Protective Paint Systems - Part 6 Laboratory Performance Test Methods (Corrected 1998)《漆和清.pdf

1、BRITISH STANDARD BS EN IS0 12944-6:1998 Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 6: Laboratory performance test methods The European Standard EN IS0 12944-6:1998 has the status of a British Standard ICs 87.020; 91.080.10 NO COPYING WITHOUT BS

2、I PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD.BSI BS EN IS0 12744-b-ENGL 1778 1b24bb 0737085 039 BS EN IS0 12944-6:1998 been prepared under the Committee for Materiais and Chemicals, was published under the authority of the Standards Committee and comes into effect on 16 November 1998 direct

3、ion of the Sector Amd. No. Date O BSI 1998 ISBN O 680 30349 7 National foreword Text affected This British Standard is the English language version of EN IS0 12944-6: 1998. It is identical with IS0 12944-6.1998. Together with the other seven parts of BS EN IS0 12944, it partially supersedes BS 5493

4、1977 which is declared obsolescent. The UK participation in its preparation was entrusted to Technical Committee STI/27, Paint systems for metallic substrates, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible internationaVEuropean committee any en

5、quiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor related international and European developments and promulgate them in the UK A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Atte

6、ntion is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which hnplement international or European publications referred to in this document

7、 may be found in the BSI Standards Catalogue under the section entitled “International standards Correspondence Index“, or by using the “Find“ facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the nece- provisions of a contract. Users of BriW Stan

8、dards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, pages

9、 ii to iv, pages 1 to 11, two annex ZA pages and a back cover. STD-BSI BS EN IS0 12944-b-ENGL 1998 M 1b24b69 073908b T75 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 12944-6 May 1998 ICs 87.020 Descriptors: see IS0 document English version Paints and varnishes - Corrosion protection of s

10、teel structures by protective paint systems - Part 6: Laboratory performance test methods (IS0 12944-6: 1 998) Peintures et vemis - Anticorrosion des structures en acier par systmes de peinture - Partie 6: Essais de performance en laboratoire (IS0 12944-6:1998) Beschichtungsstoiie - Korrosionsschutt

11、 von Stahlbauten durch BeschicMungssysteme - Teil 6: Laborprimingen zur Bewertuna von Beschichtunassvsernen Ils0 12944- w 6:1995) This European Standard was approved by CEN on 16 June 1997. CEN members are bound to comply with the CEWCENELEC Internal Regulations which stipulate the conditions for gi

12、ving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official ver

13、sions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official CEN members are the national standards bodies of Austria, Belgium, Czech Rep

14、ublic, Denmark, Finland, Fmm. Germany, GmXe, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. 7 = E e I versions. - - 7 * * rn EUROPEAN COMMTEE FOR STANDARDIUTION COMITE EUROPEEN DE NORMALISATION EUROPISCHES KOMITEE FOR NORMUNG Centra

15、l Secretarlat: rue de Stassart, 36 8-1050 Bnisrels Q 1998 CEN All rights of exploitation in any form and by any means resewed worldwide for CEN national Members. Ref. No. EN is0 12944-61998 E STD*BSI BS EN IS0 12744-b-ENGL 1778 D 1bZLibb7 0737087 701 EN IS0 12944-6:1998 Corrected 1998-06-1 8 Forewor

16、d The text of the International Standard IS0 12944-6:1998 has been prepared by Technical Committee ISOiTC 35 Paints and varnishes“ 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

17、 a national standard, either by publication of an identical text or by endorsement, at the latest by November 1998, and conflicting national standards shall be withdrawn at the latest by November 1998. According to the CENKENELEC Internal Regulations, the national standards organizations of the foll

18、owing countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the Intern

19、ational Standard IS0 12944-6:1998 was approved by CEN as a European Standard without any modification. NOTE: Normative references to International Standards are listed in annex ZA (normative). INTERNATIONAL STANDARD IS0 12944-6 First edition 1998-05-1 5 Paints and varnishes - Corrosion protection of

20、 steel structures by protective paint systems Part 6: Laboratory performance test methods Peintures et vemis - Anticorrosion des structures en acier par systmes de peinture - Partie 6: Essais de performance en laboratoire Reference number IS0 12944-6: 1998( E) STD-BSI BS EN IS0 12744-b-ENGL 1778 1b2

21、4bb7 0737087 784 EN IS0 12944-6:1998 Contents Page Scope Normative references . . . . . . Definitions . . . General . . . . . . . Tests . . . . . . . Paint system assessment . Test report . Annexes A Scratch line for IS0 7253 test B Example of report form . 1 1 3 3 4 5 8 9 10 Descriptors: paints, va

22、rnishes, steel construction, corrosion, corrosion prevention, protective coatings, tests, laboratory tests, accelerated tests. artificial ageing tests, performance tests, comparative tests. * * rn STD-BSI BS EN IS0 12944-b-ENGL 1998 1b2LtbbS 0739090 4Tb EN IS0 12944-6:1998 Foreword IS0 (the internat

23、ional Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has bee

24、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. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical stan

25、dardization. Draft International Standards adopted by 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. International Standard IS0 12944-6 was prepared by Technical

26、 Committee ISOTTC 35, Paints and varnishes, Subcommittee SC 14, Protective paint systems for steel structures. IS0 12944 consists of the following parts, under the general title Paints and varnishes - Protective paint systems for steel structures : - Part 1: General introduction - Part 2: Classifica

27、tion of environments - Part 3: Design considerations - Part 4: Types of surface and surface preparation - Part 5: Protective paint systems - Part 6: Laboratory performance test methods - Part 7: Execution and supervision of paint work - Part 8: Development of specifications for new work and maintena

28、nce Annex A of this part of IS0 12944 forms an integral part of this part of IS0 12944. Annex B is for information only. iii STD-BSI BS EN IS0 L29qq-b-ENGL 3998 W Lb29bb9 0739093 332 EN IS0 12944-6:1998 Introduction Unprotected steel in the atmosphere, in water and in soil is subject to corrosion th

29、at may lead to damage. Therefore, to avoid corrosion damage, steel structures are normally protected to withstand the corrosion stresses during the service life required of the structure. There are different ways of protecting steel structures from corrosion. IS0 12944 deals with protection by paint

30、 systems and covers, in the various parts, all features that are important in achieving adequate corrosion protection. Additional or other measures are possible but require particular agreement between the interested parties. In order to ensure effective corrosion protection of steel structures, it

31、is necessary for owners of such structures, planners, consultants, companies carrying out corrosion protection work, inspectors of protective coatings and manufacturers of coating materials to have at their disposal state-of- the-art information in concise form on corrosion protection by paint syste

32、ms. Such information has to be as complete as possible, unambiguous and easily understandable to avoid diff iculties and misunderstandings between the parties concerned with the practical i.Rp!oflonktII!? e! pri?sc?br: ?i, b) more information is needed on corrosion protection behaviour. Additional t

33、est methods may also be used by agreement between the interested parties. NOTE - If water-borne systems are being investigated, corrosion tests agreed between the interested parties should preferably be used. For example, ageing methods employing cyclic conditions (e.9. hocold temperatures, salt spr

34、ay odsalt spray off) may be utilized, and the duration times given in table 1 may act as a guide. 3 STD.BSI BS EN IS0 12744-b-ENGL 1778 - 1b2Libb 0737095 TB8 EN IS0 12944-6:1998 5 Tests 5.1 Test panels 5.1.1 Steel substrates The test panels shall be made of the same type of steel as used in practice

35、, unless otherwise agreed. The minimum panel size shall be 150mmx70 mm. The panel thickness will depend on the test, but shall be 2 mm at least. Unless otherwise agreed, the panel surface shall be prepared by blast-cleaning to surface preparation grade Sa 2% or Sa 3 as defined in IS0 8501-1. The sur

36、face roughness (profile) shall correspond to “medium (G)“ as defined in IS0 8503-1. It can be checked by using a comparator as defined in IS0 8503-2. In all other respects, test panels shall comply with IS0 7384. 5.1.2 Zinc-coated steel substrates The test panels shall be made of the zinc-coated ste

37、el used in practice, unless otherwise agreed. Site and thickness shall be as for steel substrates. Surface preparation shall be as agreed between the interested parties. Suitable surface preparation methods are given in IS0 12944-4. 5.2 Sampling of paints Take a representative sample of the product

38、to be tested (or of each product in the case of a multi-coat system), as described in IS0 1512. Examine and prepare each sample for testing, as described in IS0 1513. 5.3 Number of test panels IJn!ess othemis- egoed, popzo !hree pzne!s fcr ozch ?est. 5.4 Paint systems Preferably apply the paint to t

39、he panel by spraying. The aint shall be applied in accordance with the paint manufacturers specifications. Each coat shall be homogeneous in thickness and appearance and free from runs, sags, misses, pinholes, wrinkling, gloss variations, cissing, particle inclusions, dry overspray and blisters. The

40、 dry- film thickness, as measured in accordance with IS0 2808, shall not exceed 20 % of the specified value. Unless otherwise agreed, condition the coated test panels for three weeks in standard atmosphere (23 f 2) “C/(50 i 5) % relative humidity or (20 f 2) “C/(65 f 5) % relative humidity, as defin

41、ed in IS0 554, before testing. If the salt spray test is to be carried out (see table l), the scratch line shall cut through the paint coating down to the substrate (see annex A). Appropriate protection shall be applied to the edges and the backs of the panels. 5.5 Reference system It is recommended

42、 that a paint system which has been in successful use for years on site, and whose performance as indicated by laboratory testing is well known, is used as a reference system. This system shall be as similar as possible in composition andlor generic type and thickness to the paint system being teste

43、d. Examples of suitable paint systems are given in IS0 12944-5. 4 STD.BSI BS EN IS0 L27qq-b-ENGL 1778 Lb24bb 073707b 714 = EN IS0 12944-6:1998 5.6 Test procedures The test procedures shall be as specified in tables 1 and 2. When testing in accordance with IS0 2812-1, the following chemicals of recog

44、nized analytical quality shall be used: a) NaOH, 10 % (mm) aqueous solution; b) H2S04,lO % (m/m), aqueous; c) Mineral spirit, 18 % aromatics. For the assessment of paint systems for suitability for use in the various categories for immersion in water and burial in soil as defined in IS0 12944-2, tab

45、le 2, use the following materials: For Iml: water as defined in IS0 2812-2; For lm2 and lm3: sodium chloride, 5 % (mh) aqueous solution (instead of water). 6 Paint system assessment 6.1 General The tests to be camed out and the test durations for the paint systems in each corrosivty category (see IS

46、0 12944-2, table 1) are given in 6.2. Only one of the three test panels shall be allowed not to completely comply with the requirements specified in 6.3 For example, a system with a total dry-film thickness below 250 pm will be qualified as “high“ for corrosivity category C3 on steel if, for at leas

47、t two of the three panels: a) before testing, the classification obtained in accordance with IS0 2409 is O or 1 and b) after 480 h of salt spray (ISO7253), it has no defect when assessed in accordance with ISO4628-2 to IS0 4628-5 and the classification obtained in accordance with IS0 2409 is O or 1

48、- - = _. and 6.4. = _. - le * Lo and c) after 240 h of continuous condensation (IS0 6270), it has no defect when assessed in accordance with IS0 4628-2 to IS0 4628-5 and the classification obtained in accordance with IS0 2409 is O or 1. NOTE - For paint systems intended for water and soil (categorie

49、s Iml, lm2, lm3), “medium“ durability is the minimum required level. 6.2 Tests and test durations 6.2.1 Paint systems on steel substrates The tests and test durations given in table 1 are intended for paint systems applied on steel substrates. For paint systems intended for corrosivity category C5-1 (and after agreement between the interested parties), the IS0 2812-1 procedure can be replaced or supplemented by the IS0 3231 test using the test duration figures for IS0 6270, .e. 240 h (10 cycles) for “low“ durability, 480 h (20 cyc