1、Designation:A1059/A1059M08(Reapproved 2013)Standard Specification forZinc Alloy Thermo-Diffusion Coatings(TDC)on SteelFasteners,Hardware,and Other Products1This standard is issued under the fixed designation A1059/A1059M;the number immediately following the designation indicates theyear of original
2、adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the general requirements forprotective zinc coati
3、ngs(hereinafter referred to as the coatings)to be applied by the thermo-diffusion coating(TDC)method,to various products made of carbon steel,including low andhigh tensile parts as well as of wrought iron,sintered ironsteel-powder and various steel and stainless alloys.TDC iscarried out by immersing
4、 the parts in a zinc alloy powder atelevated temperature for a period of time,causing a metallur-gical diffusion process of zinc and iron.Further processingmay be added,such as,passivation,topcoat application,paintapplication,etc.1.2 This specification is applicable to orders in eitherinch-pound uni
5、ts(as A1059)or in SI units(as A1059M).Inch-pound units and SI units are not necessarily exactequivalents.Within the text of this specification and whereappropriate,SI units are shown in brackets.Each system shallbe used independently of the other without combining values inany way.In the case of ord
6、ers in SI units,all testing andinspection shall be done using the metric equivalent of the testor inspection method as appropriate.In the case of orders ininch-pound units,such shall be stated to the applicator whenthe order is placed.1.3 This standard does not purport to address all of thesafety co
7、ncerns,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:2A90/A90M Test Method for Weight Mass of C
8、oating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA385 Practice for Providing High-Quality Zinc Coatings(Hot-Dip)A700 Practices for Packaging,Marking,and Loading Meth-ods for Steel Products for ShipmentA902 Terminology Relating to Metallic Coated Steel Prod-uctsB487 Test Method for Me
9、asurement of Metal and OxideCoating Thickness by Microscopical Examination ofCross SectionD521 Test Methods for Chemical Analysis of Zinc Dust(Metallic Zinc Powder)D6386 Practice for Preparation of Zinc(Hot-Dip Galva-nized)Coated Iron and Steel Product and HardwareSurfaces for PaintingE376 Practice
10、for Measuring Coating Thickness byMagnetic-Field or Eddy-Current(Electromagnetic)Test-ing MethodsF1789 Terminology for F16 Mechanical FastenersF2329 Specification for Zinc Coating,Hot-Dip,Require-ments for Application to Carbon and Alloy Steel Bolts,Screws,Washers,Nuts,and Special Threaded Fasteners
11、F2674 Specification for Zinc Coating,Hot-Dip,Require-ments for Application to Carbon and Alloy Steel Bolts,Screws,Washers,Nuts,and Special Threaded FastenersMetric(Withdrawn 2011)33.Terminology3.1 The following terms and definitions are specific to thisspecification.Terminology A902 contains other t
12、erms anddefinitions relating to metallic-coated steel products.Terminol-ogy F1789 contains other terms and definitions relating tomechanical fasteners.3.2 Definitions of Terms Specific to This Standard:3.2.1 thermo-diffusion coatinga process where the steelproduct is heated in close contact with zin
13、c powder or zincmixture.3.2.2 thermo-diffusion coatinga coating made by thermo-diffusion coating process,consisting of zinc/iron alloys.1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility ofSubcommittee A05.13
14、 on Structural Shapes and Hardware Specifications.Current edition approved May 1,2013.Published May 2013.Originallyapproved in 2008.Last previous edition approved in 2008 as A1059/A1059M08.DOI:10.1520/A1059_A1059M-08R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact AST
15、M 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
16、,West Conshohocken,PA 19428-2959.United States1 3.2.3 zinc powderthe coating material used to providecorrosion protection to steel.3.2.4 zinc mixturea combination of zinc powder and othermetallic materials to be used as a coating material in the TDCprocess.4.Ordering Information4.1 Orders for coatings provided under this specificationshall include the following:4.1.1 Quantity(number of pieces to be coated)and totalweight.4.1.2 Description(type and size of products)and weight.4.1.3 ASTM specifica
