ASTM_B_810_-_01a_2017.pdf

Designation:B81001a(Reapproved 2017)Standard Test Method forCalibration of Atmospheric Corrosion Test Chambers byChange in Mass of Copper Coupons1This standard is issued under the fixed designation B810;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 the calibration of atmosphericcorrosion test chambers for electrical contacts that produce anadherent film of corrosion product on copper,such as a testcomprised of a mixture of flowing gases that react with copper.1.2 This test method is not applicable to tests wherecorrosion products may be removed from a copper surfaceduring the test by fluids.1.3 This test method is not applicable to tests whereairborne solid or liquid material may be deposited on a coppersurface during the test,as in a test which includes particulatessuspended in the atmosphere.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 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 become familiarwith all hazards including those identified in the appropriateSafety Data Sheet(SDS)for this product/material as providedby the manufacturer,to establish appropriate safety and healthpractices,and determine the applicability of regulatory limi-tations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles 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:2B845 Guide for Mixed Flowing Gas(MFG)Tests for Elec-trical Contacts3.Summary of Test Method3.1 Copper coupon samples of a well-defined size areprepared and each is labeled for identification.All suchcoupons are cleaned by a standard process.Each coupon isweighed and the value is recorded.All coupons are exposed tothe corrosion test for a specified time.The coupons areremoved from the test and weighed and the new values arerecorded.The change in weight for each coupon is calculated.The coupons are subjected to additional analysis as appropriateto determine the composition and thickness of any filmspresent on the surface.4.Significance and Use4.1 Electrical devices that contain electrical contacts gener-ally contain some copper-based materials.Atmospheric corro-sion of copper parts in such devices often occurs in serviceenvironments.A quantitative measure of the effect of alaboratory corrosion test on copper permits assessment of theseverity of the test.In addition,corrosion tests may be definedin terms of their effect on copper;this test method provides away of comparing one test against a standard definedelsewhere,or allows a comparison of the performance of a testover a period of time.Although this test method provides for arelatively simple check of a test,the user is advised thatadditional analysis of the test chamber ambient is generallyrequired to reproduce test conditions.4.2 Atmospheric corrosion tests are used on a variety ofmaterials besides copper.Care should be exercised in drawingconclusions about the effects on such materials of apparentlyequivalent tests if the composition of gases or experimentalconditions are different.The primary use of this calibration testmethod is to assure correlation among nominally identicaltests.1This test method is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.11 on Electrical Contact Test Methods.Current edition approved April 1,2017.Published April 2017.Originallyapproved in 1991.Last previous edition approved in 2011 as B810 01a(2011).DOI:10.1520/B0810-01AR17.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international 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)Committee.1 5.Apparatus5.1 Racks or Fixtures suitable for holding the coppercoupons in the test chamber are required.Make these fixturesfrom a material that is not attacked by the corrosion test.Thefixtures shall be design