1、Designation:D161112(Reapproved 2019)Standard 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 las
2、t revision.A number 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 U.S.Department of Defense.1.Scope1.1 This test method covers the qualitative a
3、nd quantitativedetermination 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 it
4、s use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principl
5、es on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D91 Test Method for Precipitation Numbe
6、r of LubricatingOils2.2 Military Standard:3MIL-H-6083(latest 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 sur
7、face or by a change in mass of themetal tested in comparison 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
8、of a layer of reaction products on themetal surface shall 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 aftercontac
9、t with a leather specimen,which discoloration is causedby 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
10、 and two plates of thesame metal are dipped in a noncorrosive 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,th
11、e metal plates areweighed before and after the test.5.Significance 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 accelera
12、ting theresults.1This test method is under 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,
13、2019.Published April 2019.Originallyapproved in 1958.Last previous edition approved in 2012 as D161112.DOI:10.1520/D1611-12R19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,ref
14、er to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis in
15、ternational standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Com
16、mittee.1 6.Apparatus6.1 Desiccator,containing a 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).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 plate