ASTM_G_198_-_11.pdf

Designation:G19811Standard Test Method forDetermining the Relative Corrosion Performance of DrivenFasteners in Contact with Treated Wood1This standard is issued under the fixed designation G198;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 test method covers and focuses on the corrosionresistance of metal,metal-coated,and nonmetallic-coatedsmooth and deformed shank driven fasteners in contact withtreated wood in exterior or high moisture exposure applicationsusing comparative tests with control fastener specimens ofstandardized benchmarks.This test method may be used forpreservative-treated wood.1.2 This test method describes the apparatus,procedure,andconditions required to maintain test environments for theCyclic Fog Test and the Steady State Moisture Test.1.3 This test method describes the types of test samples,listsexposure periods,and gives guidance on interpretation ofresults.1.4 Until experience is gained comparing laboratory-to-laboratory results with this test method,comparisons of fas-teners,coatings,materials,or preservatives shall be made onlywithin the results of the same test.1.5 The values stated in SI units are to be regarded asstandard.The values in parentheses are for information only.1.6 This standard does not purport to address all of thesafety concerns,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 Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA153/A153M Specification for Zinc Coating(Hot-Dip)onIron and Steel HardwareB117 Practice for Operating Salt Spray(Fog)ApparatusB487 Test Method for Measurement of Metal and OxideCoating Thickness by Microscopical Examination ofCross SectionB499 Test Method for Measurement of Coating Thicknessesby the Magnetic Method:Nonmagnetic Coatings onMagnetic Basis MetalsB504 Test Method for Measurement of Thickness of Metal-lic Coatings by the Coulometric MethodD610 Practice for Evaluating Degree of Rusting on PaintedSteel SurfacesD1165 Nomenclature of Commercial Hardwoods and Soft-woodsD1193 Specification for Reagent WaterD4442 Test Methods for Direct Moisture Content Measure-ment of Wood and Wood-Base MaterialsD4444 Test Method for Laboratory Standardization andCalibration of Hand-Held Moisture MetersE376 Practice for Measuring Coating Thickness byMagnetic-Field or Eddy-Current(Electromagnetic)Test-ing MethodsG1 Practice for Preparing,Cleaning,and Evaluating Corro-sion Test SpecimensG60 Practice for Conducting Cyclic Humidity ExposuresG85 Practice for Modified Salt Spray(Fog)TestingG193 Terminology and Acronyms Relating to Corrosion2.2 American Wood Protection Association:3U1-09 Use Category System:Use Specification for TreatedWood3.Terminology3.1 DefinitionsTerminology G193 contains other termsand definitions relating to corrosion and corrosion testing.Terminology D1165 contains other terms and definitions relat-ing to wood and wood testing.3.2 Definitions of Terms Specific to This Standard:3.2.1 bright,adjuncoated steel.3.2.2 fastener,nmetallic,metal-coated,or nonmetallic-coated smooth or deformed shank driven fastener.1This test method is under the jurisdiction of ASTM Committee G01 onCorrosion of Metals and is the direct responsibility of Subcommittee G01.14 onCorrosion of Metals in Construction Materials.Current edition approved March 1,2011.Published March 2011.DOI:10.1520/G019811.2For 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.3Available from American Wood Protection Association(AWPA),P.O.Box361784,Birmingham,AL 35236-1784,http:/.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.3 test sample,ncombination of fasteners installed intoa treated wood specimen.3.2.4 wood specimen,nsection of wood into which fas-teners are driven to form test samples.Specimens may betreated for testing of materials,coatings,or chemicals or maybe untreated for use as controls.3.2.4.1 DiscussionWood cross-sectional dimensions aregiven in exact numbers for SI units and nominal numbers forinch-pound units.4.Summary of Test Method4.1 This test method covers the preparation,testing andevaluation of metal,metal-coated,or nonmetallic-coatedsmooth or deformed shank driven fasteners installed in treatedwood.Control specimens tested in the same conditions shall behot-dip galvanized fasteners that are coated as described