1、Designation: D 609 00 (Reapproved 2006)Standard Practice forPreparation of Cold-Rolled Steel Panels for Testing Paint,Varnish, Conversion Coatings, and Related CoatingProducts1This standard is issued under the fixed designation D 609; the number immediately following the designation indicates the ye
2、ar 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 (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Depart
3、ment 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,
4、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 saf
5、etyconcerns, 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:2A 109/A 109M Specification for Steel
6、, Strip, Carbon (0.25Maximum Percent), Cold-RolledA 366/A 366M Specification for Commercial Steel (CS),Sheet, Carbon (0.15 Maximum Percent), Cold-Rolled3D 235 Specification for Mineral Spirits (Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)3. Summary of Practice3.1 Several procedures for prepa
7、ration 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
8、. 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
9、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 a
10、nd 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 charac
11、terized 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.5.3 Type 2 steel panels are flat polished (or “ground”)
12、 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 mostcoa
13、tings are applied, because polishing significantly improvesthe corrosion resistance performance of coatings by altering themetallurgical nature of the steel substrate. To ensure complete1This practice is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings, Materials, and Applic
14、ations and is the direct responsibility ofSubcommittee D01.27 on Accelerated Testing.Current edition approved Nov. 1, 2006. Published November 2006. Originallyapproved in 1941. Last previous edition approved in 2000 as D 609 00.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or
15、contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.removal
16、 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 completeremova
17、l 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 useful for measuring many paint properties such ascolor, gloss, flexibility, or adhesion, where it is desirable tominim
18、ize the effects of variation in surface roughness.6. Methods of Preparation6.1 After preparation, the surface of the panel should bewater-break free, which is determined by immersing a repre-sentative panel momentarily in distilled water. The watershould form a continuous unbroken film over the enti
19、resurface, without beading up into droplets or other water-breaks.6.2 Procedure A: Conversion CoatingsConversion coat-ings such as phosphates or chromates are available from anumber of sources as proprietary compounds or processes forapplication by either spray or immersion. Follow the manufac-turer
20、s directions as to the application of the conversioncoating. Preparation of test panels may consist of one or moresteps of cleaning, rinsing, or conditioning prior to the applica-tion of the conversion coating. Additional rinsing with waterwill usually be required after the conversion coating is app
21、lied.To prevent rust, force dry immediately after rinsing.6.3 Procedure B: Vapor DegreasingSuspend the panels ina vapor-phase type degreaser containing stabilized 1,1,1-trichloroethane and allow them to remain above the boilingsolvent. When the panels attain vapor temperature, condensa-tion of vapor
22、 onto the panels no longer occurs. Prewiping witha clean, lintless cloth saturated with mineral spirits may benecessary, since vapor degreasing generally does not removesolid particulate matter such as dirt, etc. (see Note 1).NOTE 1Other organic solvents or combinations of solvents that willproduce
23、a water-break free surface may be used if agreed upon betweenthe purchaser and the supplier.6.4 Procedure C: Solvent BrushingPower-brush scrub thepanel with mineral spirits (Specification D 235). When allsoluble and loosely adhering soil has been washed off, flushwith clean mineral spirits. Dry at a
24、 temperature of 52 to 93C(125 to 200F) before use or storage (see Note 1).6.5 Procedure D: Solvent WipingUsing clean, lintlesscloth wet with mineral spirits, vigorously rub the panel surfaceuntil all soluble and loosely adhering soil has been removed.Flush with clean solvent. Dry at a temperature of
25、 52 to 93C(125 to 200F) before use or storage (see Note 1).6.6 Procedure E: Alkaline CleaningAqueous alkalinecleaners are available from a number of sources as proprietarycompounds or processes. Clean the panels with an alkalinesolution or cleaner applied by spray or immersion. Brush orwipe in accor
26、dance with the recommendations of the cleanermanufacturer. One or more steps of rinsing with water will berequired after this procedure of cleaning. To prevent rust, forcedry immediately after rinsing.7. Protection After Preparation7.1 To prevent rust, wrap panels that are not to be usedimmediately
27、after preparation, in a paper impregnated withdicyclohexylammonium nitrite, or an equivalent volatile cor-rosion inhibitor (VCI), and place in a plastic bag or envelope.7.1.1 Bare steel panels used after prolonged storage in VCIpaper may have a residue of VCI that may affect some kinds oftests. The
28、VCI residue can generally be removed by wiping thepanel several times with a clean, lint-free cloth wetted withwarm distilled water.4Its important to dry the panel thor-oughly immediately after wiping to prevent flash rust. Forcritical tests, the operator can verify the presence and effect ofVCI res
29、idue by testing a representative paint on both a panelwiped with water and on a panel straight out of the VCI wrap.Wiping with water is not recommended for phosphated panels,because of the difficulty of removing water from the phosphatecoating.7.2 To avoid contamination from fingerprints, do not tou
30、chthe surface of the panels after preparation. Its preferable thatthe panels be handled only with clean, lint-free gloves. Handlethe panels only by the edges, even if wearing gloves.8. Keywords8.1 panels; sheet metal; steel panels; substrate-coatingsapplication4Skerry, B., “Prewashing Commercially S
31、upplied Cold-Rolled Steel Test Panelsand Its Effect on Coating Adhesion,” Journal of Coatings Technology, Vol 62, No.788, September 1990, pp. 5558.TABLE 1 Steel PanelsNOTE 1 in. = microinches; nm = nanometer.Type No. Description Thickness, in. (mm)Hardness(Rockwell B)Roughness (Arithmetic Mean), in.
32、(nm)ASTM Specification1 Cold-rolled steel, as rolled(matte)0.024 to 0.038 (0.6 to 1.0) 4075 2565 (7601650) A 109/A 109M,A 366/A 366M2 Cold-rolled steel, flat-polishedone side0.024 to 0.038 (0.6 to 1.0) 4075 flat polished to 1550(3801270)A 109/A 109M,A 366/A 366M3 Cold-rolled steel, as rolled(smooth)
33、0.010 to 0.024 (0.25 to 0.6) 4075 less than 20 (500) A 109/A 109M,A 366/A 366MD 609 00 (2006)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determinat
34、ion of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withd
35、rawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your
36、 comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 609 00 (2006)3
