ASTM_D_609_-_00_2012.pdf

Designation:D60900(Reapproved 2012)Standard Practice forPreparation of Cold-Rolled Steel Panels for Testing Paint,Varnish,Conversion Coatings,and Related CoatingProducts1This standard is issued under the fixed designation D609;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.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This practice covers various types of cold rolled steelpanels and the procedures to be followed in their preparationfor testing paint,varnish,lacquer,conversion coatings,andrelated products.1.2 The procedures are as follows:Procedure AConversion coatings(phosphates,chromates,etc.)Procedure BVapor degreasingProcedure CSolvent brushingProcedure DSolvent wipingProcedure EAlkaline cleaning1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 This standard does not purport to address the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A109/A109M Specification for Steel,Strip,Carbon(0.25Maximum Percent),Cold-RolledA366/A366M Specification for Commercial Steel(CS)Sheet,Carbon,(0.15 Maximum Percent)Cold-Rolled(Withdrawn 2000)3D235 Specification for Mineral Spirits(Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)3.Summary of Practice3.1 Several procedures for preparation and cleaning of steeltest panels are described as shown in Table 1.4.Significance and Use4.1 The procedures described in this practice are designed toprovide steel panels with a uniform and reproducible surfacefor testing of paint,varnish,lacquer,conversion coatings,andrelated products.5.Test Panels5.1 Prepare the test panels from rust and stain-free cold-rolled steel as described in 5.2,5.3,5.4,and Table 1.Thepanels shall be made to a size and thickness as agreed uponbetween the purchaser and seller.Edges shall be smooth andcorners rounded.The steel may have been coated at the millwith a suitable rust preventive compound for protection duringshipment and storage.However,long-term steel storage withoil on the surface may cause an oil/steel reaction known as oilstain.Since such stains inhibit chemical bonding,the steelselected for panels shall be free of oil stain and other visibleprocessing variation caused by pickling or annealing.5.2 Type 1 steel has a matte finish produced by steel millrolls that have been grit blasted.This finish is typical ofcold-rolled steel used for painted surfaces on automobiles,appliances,etc.Such surfaces can be partially characterized bymeasuring the average peak-to-valley distance and the numberof peaks per unit area.However,conversion coating and paintperformance on such surfaces may vary because of differentoxidation,annealing procedures,and surface conditions.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 June 1,2012.Published July 2012.Originally approvedin 1941.Last previous edition approved in 2006 as D609 00(2006).DOI:10.1520/D0609-00R12.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.3 Type 2 steel panels are flat polished(or“ground”)afterthe steel has been received from the mill.Flat polishing is amethod of mechanically grinding the surface with abrasivebelts to remove surface contaminants and provide a moreuniform and reproducible surface for testing.Flat-polishedpanels are not representative of the surface on which mostcoatings are applied,because polishing significantly improvesthe corrosion resistance performance of coatings by altering themetallurgical nature of the steel substrate.To ensure completeremoval of surface contaminants,the original surface shall becompletely removed as determined by visual inspection;in anycase,a minimum of 7.5 m(0.3 mils)of surface shall beremoved.Care must be used in the operation of the polishingapparatus and after cleaning the test panel,to ensure completeremoval of grit and steel particles from the polished surface.5.4 Type 3 steel panels have a smooth finish produced bysteel mill rolls which have been smooth ground.This smoothfinish is us