1、Designation:D161112Standard Test Method forCorrosion Produced by Leather in Contact with Metal1This standard is issued under the fixed designation D1611;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A numb
2、er 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 test method covers the qualitative and quantitativedeterm
3、ination of corrosion produced by leather in contact withmetal.This test method does not apply to wet blue.1.2 The values stated in inch-pound units are to be regardedas the standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is therespon
4、sibility 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:2D91 Test Method for Precipitation Number of LubricatingOils2.2 Military Standard:3MIL-H-6083(l
5、atest revision)Hydraulic Fluid,PetroleumBase,for Preservation and Operation3.Terminology3.1 Definitions:3.1.1 corrosiona modification of the metal surface incontact with a leather specimen,evidenced by visible pittingand erosion of the metal surface or by a change in mass of themetal tested in compa
6、rison with a blank determination.Anypermanent discoloration in film form on the specimen(metal)that does not readily buff off with a nonabrasive cloth shall becalled incipient corrosion,while any visible pitting of the metalsurface or formation of a layer of reaction products on themetal surface sha
7、ll be considered as corrosion.In the latter caseand for quantitative purposes,the corrosion level should beassessed by determination of the mass changes which occur inthe metal panel.3.1.2 staininga discoloration of the metal surface aftercontact with a leather specimen,which discoloration is caused
8、by minor amounts of leathermetal interreaction productsformed on the metal surface.Such stains should readily buff offthe metal surface without permanent marring of its surfaceappearance.4.Summary of Test Method4.1 A conditioned piece of leather and two plates of thesame metal are dipped in a noncor
9、rosive oil and drained to thedrip point.They are stacked together under a load of 25 6 5 lbf(111 6 22 N)and placed in a desiccator containing a relativehumidity of 90 to 95%at 73.5 6 2F(23 6 1C)for a periodof 14 days.For quantitative purposes,the metal plates areweighed before and after the test.5.S
10、ignificance and Use5.1 The procedure is primarily intended to evaluate chromeleather intended for use in hydraulic systems under circum-stances where metal corrosion is a serious factor.A highrelative humidity is used for the purpose of accelerating theresults.6.Apparatus6.1 Desiccator,containing a
11、saturated solution of ammo-nium dihydrogen phosphate.6.2 Four Plates of the Metal to Be Tested4The surfaceroughness should be 8 to 20 in(203 to 508 nm)rms finish.They should be approximately 2 by 4 in.(51 by 102 mm)andof uniform thickness.6.3 Mass,25 6 5 lb(11.3 6 2.3 kg).1This test method is under
12、the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of D31.01 on Vegetable Leather.This test methodwas developed in cooperation with the American Leather Chemists Assn.(StandardMethod E52-1961).Current edition approved April 1,2012.Published April 2012.Originallyapprove
13、d in 1958.Last previous edition approved in 2010 as D161100(2010).DOI:10.1520/D1611-12.2For 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 pag
14、e onthe ASTM website.3Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.4The sole source of supply of the steel test panels-Q Panel QD35,3 by 5 in.,surface roughness 203305 nm,known to the committee at this time is The Q PanelC
15、ompany,15610 Industrial Parkway,Cleveland,OH 44135.If you are aware ofalternative suppliers,please provide this information to ASTM Headquarters.Yourcomments will receive careful consideration at a meeting of the responsibletechnical committee1,which you may attend.Copyright ASTM International,100 B
16、arr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.4 Nonabrasive ClothThe cloth should not scratch or marthe surface of the metal plates when the plates are rubbed withthe cloth,or cause any change in the mass of the metal plates.6.5 Forceps.6.6 Analytical Balance.6.7 Piece of Glass,of approximately the length and width ofthe metal panels.7.Reagents7.1 Noncorrosive Oil,conforming to Military SpecificationMIL-H-6083 is recommended.7.2 Precipitation Naphtha,conforming to
