ASTM_D_2201_-_99_2011.pdf

Designation:D220199(Reapproved 2011)Standard Practice forPreparation of Zinc-Coated and Zinc-Alloy-Coated SteelPanels for Testing Paint and Related Coating Products1This standard is issued under the fixed designation D2201;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,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 practice covers the preparation of zinc-coated andzinc-alloy-coated sheet steel panels to be used for testing paint,varnish,lacquer,conversion coatings,and related products.Itcovers sheet steel coated with hot dipped galvanized,one-sidegalvanized,electrogalvanized,zinc-iron alloy coatings(such asgalvanneal),and zinc-5%aluminum alloy coatings.It does notcover steel panels coated with 55%aluminum-45%zinc alloy,because these behave more like aluminum than zinc.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety problems,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A525 Specification for General Requirements for SteelSheet,Zinc-Coated(Galvanized)by the Hot-Dip Process(Withdrawn 1994)3A591/A591M Specification for Steel Sheet,ElectrolyticZinc-Coated,for Light Coating Weight Mass Applica-tions(Withdrawn 2005)3A875/A875M Specification for Steel Sheet,Zinc-5%Alu-minum Alloy-Coated by the Hot-Dip ProcessD609 Practice for Preparation of Cold-Rolled Steel Panelsfor Testing Paint,Varnish,Conversion Coatings,andRelated Coating ProductsD2092 Guide for Preparation of Zinc-Coated(Galvanized)Steel Surfaces for Painting(Withdrawn 2008)32.2 ISO Standards:4ISO 3575 Continuous hot-dip zinc-coated carbon steel sheetof commercial,lock-forming and drawing qualitiesISO 5002 Hot-rolled and cold-reduced electrolytic zinc-coated carbon steel sheet of commercial and drawingqualities3.Significance and Use3.1 The procedures described in this practice are designed toprovide uniform zinc coated steel panels for testing of paint,varnish,lacquer,conversion coatings and related products.3.2 The proper description of the zinc coating on thesubstrate is an important part of this practice.Seemingly slightdifferences in zinc coating can produce substantial differencesin coating performance.4.Metal Substrate4.1 The test panels shall be completely free of any visiblesigns of storage stain or white rust(zinc corrosion).All cornersand edges shall be smooth and uniformly rounded.4.2 The type of zinc coating,zinc thickness,metal thick-ness,and panel size shall be agreed upon between the pur-chaser and seller.4.3 Zinc coated steel may be shipped from the mills unoiled.However,zinc coated steel that has been oiled with a nonre-active rust preventative oil shall be acceptable under thisspecification.4.4 Zinc coated steel may be shipped from the mill with aphosphate pretreatment for improved paint bonding.NOTE1Caution:Alkaline cleaning such pre-phosphated metal willoften remove the phosphate coating4.5 Elimination of Passivating Treatments:4.5.1 The test panels shall be free of passivating treatments(Note 2),because such treatments interfere with paint bonding.1This practice is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.27 on Accelerated Testing.Current edition approved July 1,2011.Published July 2011.Originally approvedin 1963.Last previous edition approved in 2006 as D2201 99(2006).DOI:10.1520/D2201-99R11.2For 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 website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE2Passivating treatments are applied at the mill to preventoxidation of the zinc(white rust)during storage.Because they bondtightly to the zinc,they also prevent paints and other coatings frombonding to the zinc.Zinc coated material stocked in commercial ware-houses almost always has a passivating treatment.To obtain nonpassivatedzinc coated steel,its generally necessary to special order steel directlyfrom a steel mill,or to buy panels from manufacturers of standard testpanels.See Appendix titled Identifying the Presence of and RemovingChromate Tre