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ASTM_D_7396_-_14_2020.pdf

1、Designation:D739614(Reapproved 2020)Standard Guide forPreparation of New,Continuous Zinc-Coated(Galvanized)Steel Surfaces for Painting1This standard is issued under the fixed designation D7396;the number immediately following the designation indicates the year oforiginal adoption or,in the case of r

2、evision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide covers surface cleaning and various methodsfor treating new,continuous zinc-coated(galvanize

3、d)steelsurfaces produced by either the hot-dip method or by electro-plating.This guide is applicable to only surface preparation forapplication of liquid paint and coating products,and not forpowder coating applications.This guide covers surfaces thathave not been treated previously at the mill to p

4、rovidetemporary protection against staining by moisture other than byeasily removed protective oils(see Appendix X1).For prepar-ing surfaces of new or weathered items of zinc-coated steelproduced by batch processing,refer to Practice D6386.1.2 The values stated in SI units are to be regarded as thes

5、tandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mi

6、ne the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations

7、issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A780 Practice for Repair of Damaged and Uncoated Areasof Hot-Dip Galvanized CoatingsD4285 Test Method for Indicating Oil or Water in Com-pressed AirD6386 Practice for Preparation

8、 of Zinc(Hot-Dip Galva-nized)Coated Iron and Steel Product and HardwareSurfaces for PaintingD6492 Practice for Detection of Hexavalent Chromium OnZinc and Zinc/Aluminum Alloy Coated Steel2.2 SSPCThe Society for Protective Coatings Standards:3Surface Preparation Specification No.1 Solvent CleaningSur

9、face Preparation Specification No.2 Hand Tool CleaningSurface Preparation Specification No.3 Power Tool Clean-ingSurface Preparation Specification No.16 Brush-Off BlastCleaning of Coated and Uncoated Galvanized Steel,Stainless Steel,and Non-Ferrous MetalsPaint Specification No.27 Basic Zinc Chromate

10、-Vinyl Bu-tyral Wash Primer3.Summary of Guide3.1 This guide describes surface cleaning and treatmentmethods that provide galvanized surfaces suitable for painting,specifically so that an applied coating system can develop theadhesion necessary for satisfactory service life.3.2 Eight methods of treat

11、ment(Note 1 and Note 2)arecovered as follows:3.2.1 Method AZinc Phosphate Treatment.3.2.2 Method BChromate Treatment.3.2.3 Method CAqueous Chromic-Organic Treatment.3.2.4 Method DAcid-Curing Resinous Treatment.3.2.5 Method EAnnealing Heat Treatments.3.2.6 Method FAmorphous Complex-Oxide Treatment.3.

12、2.7 Method GAbrasive Blast Cleaning.3.2.8 Method HFluro-Titanic/Zirconic Polymer Treat-ment.NOTE1Materials employed in these methods of treatment areavailable from a number of sources as proprietary compounds or methods.Selection may be made from available sources.NOTE2The use of solvents containing

13、 volatile organic compounds toprepare or treat the surface of metal components contributes to airpollution in the same manner as the use of solvent containing paints andcoatings.The user of this guide must determine the applicability ofappropriate regulations governing the volatile organic compound

14、content1This guide is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.46 on Industrial Protective Coatings.Current edition approved Feb.1,2020.Published February 2020.Originallyapproved in 2007.L

15、ast previous edition approved in 2014 as D7396 14.DOI:10.1520/D7396-14R20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM

16、website.3Available from Society for Protective Coatings(SSPC),40 24th St.,6th Floor,Pittsburgh,PA 15222-4656,http:/www.sspc.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organ

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