1、Designation: D 2201 99 (Reapproved 2006)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 D 2201; the number immediately following the designation indicates the year ofo
2、riginal 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.1. Scope1.1 This practice covers the preparation of zinc-coated andzinc
3、-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
4、. 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 o
5、f 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:2A 525 Specification for
6、 General Requirements for SteelSheet, Zinc-Coated (Galvanized) by the Hop-Dip Process3A 591/A 591M Specification for Steel Sheet, ElectrolyticZinc-Coated, for Light Coating Weight Mass Applica-tions3A 875/A 875M Specification for Steel Sheet, Zinc-5 %Aluminum Alloy-Coated by the Hot-Dip ProcessD 609
7、 Practice for Preparation of Cold-Rolled Steel Panelsfor Testing Paint, Varnish, Conversion Coatings, andRelated Coating ProductsD 2092 Guide for Preparation of Zinc-Coated (Galvanized)Steel Surfaces for Painting2.2 ISO Standards:ISO 3575 Continuous hot-dip zinc-coated carbon steel sheetof commercia
8、l, lock-forming and drawing qualities4ISO 5002 Hot-rolled and cold-reduced electrolytic zinc-coated carbon steel sheet of commercial and drawingqualities43. Significance and Use3.1 The procedures described in this practice are designed toprovide uniform zinc coated steel panels for testing of paint,
9、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
10、 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 coat
11、ed 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.NOTE 1Caution
12、: 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.NOTE 2Passivating treatments are applied at the mi
13、ll 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 coa
14、ted steel, its generally necessary to special order steel directly1This 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 Nov. 1, 20
15、06. Published November 2006. Originallyapproved din 1963. Last previous edition approved in 1999 as D 2201 99.2For 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 st
16、andards Document Summary page onthe ASTM website.3Withdrawn.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United State
17、s.from a steel mill, or to buy panels from manufacturers of standard testpanels. See Appendix titled Identifying the Presence of and RemovingChromate Treatments used as Wet-Storage (Also Called Humid-Storage)Stain Inhibitors of Guide D 2092 for further information on identifying thepresence of passi
18、vating treatments.4.5.2 Zinc coated sheet that has never been subjected to anykind of passivating treatment is preferred for this practice.4.5.3 Zinc coated sheet that has been passivated may beused if the passivating treatment is removed in accordance with5.1.NOTE 3Caution: Removing the passivation
19、 may alter the morphol-ogy of the zinc crystal structure.5. Methods of Preparation5.1 If the surface has a passivating treatment, remove it byrubbing with a non-woven abrasive pad and rinsing withdistilled or deionized water.5.2 Use one of the methods of preparation described inPractice D 609 or Gui
20、de D 2092.NOTE 4Oiled electrogalvanized or zinc-iron alloy sometimes needs tobe cleaned with mineral spirits before alkaline cleaning, depending on thelength of time the metal has been stored with the oil on the surface.5.3 After preparation, the surface of the panel shall bewater-break free. This i
21、s determined by immersing a represen-tative panel momentarily in distilled water. The water shouldform a continuous unbroken film over the entire surface,without beading up into droplets or other water breaks. If thesurface is not water-break free, it is generally an indication ofcontaminants on the
22、 surface, and further cleaning is required.6. Protection after Processing6.1 To prevent corrosion, panels should be used as quicklyas possible after processing. Panels that are not to be usedimmediately after preparation shall be wrapped in a paperimpregnated with a volatile corrosion inhibitor (VCI
23、) specifi-cally designed for zinc, and then placed in a waterproof bag orenvelope. In order to avoid contamination from fingerprints, donot touch the surface of the panel after it has been cleaned.Handle the panels by the edges only.7. Report7.1 Report the following information:7.1.1 Panel size and
24、thickness,7.1.2 Steel temper (for example, commercial quality, draw-ing quality, drawing quality special killed),7.1.3 Method of preparation used,7.1.4 Description of Zinc CoatingIt is absolutely essentialto report a detailed description of zinc coating. Seeminglyslight differences in zinc coating c
25、an make a large difference incoating performance. Information on describing the zinc coat-ing can be found in Appendix X1. The description of zinccoating should include:7.1.4.1 Type of coating,7.1.4.2 Coating weight (on each side of the panels if there isa difference),7.1.4.3 Spangle (for hot dipped
26、 galvanized),7.1.4.4 Passivating treatment, if any, and7.1.4.5 Phosphate pretreatment applied at the steel mill, ifany.8. Keywords8.1 galvanized surfaces; specimen preparation; steel panels;test specimens; zincAPPENDIX(Nonmandatory Information)X1. CHARACTERIZATION OF ZINC COATINGX1.1 This appendix b
27、riefly describes many of the zinc andzinc alloy coatings, but is not exhaustive. New types ofcoatings and variations on existing coatings are always beingdeveloped. Further information on zinc coated steel can beobtained from the applicable ASTM specification, or ISOspecification, or from the Americ
28、an Iron and Steel Institute(AISI), 1133 15th Street NW, Washington, DC 20005.X1.2 Hot-Dipped Zinc Coated (Specification A 525): Thisis a pure zinc “galvanized” coating produced by immersing thesteel in a bath of molten zinc. Unless special steps are taken, itproduces a “full spangle” pattern of zinc
29、 crystals like thefamiliar pattern on sheet metal air ducts. For improved paintappearance, special processing can create a “minimizedspangle” with much smaller crystals, or a “spangle free”surface where the crystal structure is not visible. CommonASTM SpecificationA 525 coating weights are G60 (0.60
30、 oz/ft2), or G90 (0.90 oz/ft2), up to G235 (2.35 oz/ft2). Common ISOcoating weights are Z700 (700 g/m2), Z350 (350 g/m2), Z100(100 g/m2) and Z001 (no minimum). Refer to ISO 3575 forfurther information.X1.3 Zinc-Iron Alloy Coated (Specification A 525): Thiscoating is often called “galvannealed.” It i
31、s produced byheating or wiping a hot dipped zinc coating to convert itcompletely into a zinc-iron alloy. Common SpecificationA 525coating weights are A60 (0.60 oz/ft2), A40 (0.40 oz/ft2), downto A01 (no minimum coating weight). Common ISO coatingweights are ZF 180 (180 g/m2), ZF 100 (100 g/m2), and
32、ZF 001(no minimum). Refer to ISO 3575 for further information.X1.4 Electroplated Zinc Coated (Specification A 591/A 591M): Often called “electrogalvanized,” this coating isproduced by continuous electroplating. ASTM coating weightis expressed as A (no minimum), B (0.070 oz/ft2), or C (0.150oz/ft2).
33、Common ISO coating weights are ZE 10/10 (1.0 m)D 2201 99 (2006)2and ZE 75/75 (7.5 m). Refer to ISO 5002 for further infor-mation. In addition to pure zinc, electroplated coatings are alsomade in zinc/iron alloy and zinc/nickel alloy.X1.5 One Sided or Differentially Coated: Zinc and zincalloy coating
34、s are frequently produced with no coating on oneside or with a much lower coating weight on one side. In suchcases, its important to report the coating weight on both sides.Also, sheet steels can be coated with a heavier coating ofhot-dipped zinc or electroplated zinc on one side, and a lightercoati
35、ng of zinc-iron alloy on the back side. The two sides ofsuch sheets will have very different characteristics in terms ofpaint performance. Common ISO coating weights are ZE 135/0(13.5 m/0 m) and ZE 150/0 (15.0 m/0 m).X1.6 Zinc-5 % Aluminum Alloy Coated (SpecificationA 875/A 875M): This hot dipped co
36、ating, often called “Gal-fan” is approximately 95 % zinc, 5 % aluminum, and approxi-mately 0.1 % other metals (either magnesium or “mischmetal,”a mixture of rare earth metals). Common ASTM SpecificationA 875/A 875M coating weights are GF30 (0.30 oz/ft2), GF45(0.45 oz/ft2), up to GF235 (2.35 oz/ft2).
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38、 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 withdrawn. Your comments are invited either for revision of this standard or for additional standar
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40、ee 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 2201 99 (2006)3
