ASTM_D_6284_-_09.pdf

Designation:D628409Standard Test Method forRubber PropertyEffect of Aqueous Solutions withAvailable Chlorine and Chloramine1This standard is issued under the fixed designation D6284;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 procedures for evaluating theability of rubber and rubber-like materials to withstand theeffects of aqueous solutions with available chlorine andchloramine.It is intended to compare the effects of chlorinecompounds,present in potable water due to disinfectionprocedures,on rubber articles.1.2 Test solutions are designed to contain chlorine com-pounds,including hypochlorous acid(HOCl),hypochloriteions(OCl),and monochloramine(NH2Cl).1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 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:2D471 Test Method for Rubber PropertyEffect of LiquidsD1193 Specification for Reagent WaterD1253 Test Method for Residual Chlorine in WaterD1889 Test Method for Turbidity of Water(Withdrawn2007)3D2240 Test Method for Rubber PropertyDurometer Hard-nessD3182 Practice for RubberMaterials,Equipment,and Pro-cedures for Mixing Standard Compounds and PreparingStandard Vulcanized SheetsD3183 Practice for RubberPreparation of Pieces for TestPurposes from ProductsD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustries3.Terminology3.1 The terminology of chlorine compounds used in this testmethod is in accordance with Test Method D1253,Section 7.3.2 combined residual chlorineresidual consisting ofchlorine combined with ammonia nitrogen and nitrogenouscompounds.3.3 free available chlorine residualresidual consisting ofhypochlorite ions(OCI)or hydrochlorous acid(HOCl),orboth.3.4 total residual chlorine(chlorine residual)the amountof available chlorine-induced oxidants present in water at anyspecified period,subsequent to the addition of chlorine.4.Summary of Test Method4.1 This test method provides procedures for exposing testpieces to aqueous available chlorine and chloramine solutionsunder defined conditions of temperature and time.4.2 This test method includes the following procedures:Change in mass after immersionSection 10Change in volume after immersionSection 11Change in hardness after immersionSection 12Visual and turbidity rating after immersionSection 134.3 The resulting deterioration is measured by changes inmass,volume,hardness,and appearance of the test piecesurfaces and test liquid after immersion.4.4 This test method also describes the preparation of theimmersion liquids.5.Significance and Use5.1 Rubber articles,such as seals,gaskets,and membranes,may be exposed in service to chlorine compounds used inpotable water as disinfectants.The exposure may be intermit-tent or continuous and can occur at various temperatures.1This test method is under the jurisdiction of ASTM Committee D11 on Rubberand is the direct responsibility of Subcommittee D11.40 on Consumer RubberProducts.Current edition approved July 1,2009.Published August 2009.Originallyapproved in 1998.Last previous edition approved in 2008 as D6284 02(2008)1.DOI:10.1520/D6284-09.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.2 Properties of rubber articles can deteriorate as a result ofexposure to water containing these chlorine compounds,af-fecting their performance for the intended use.5.3 This test method attempts to simulate service conditionsthrough controlled accelerated testing,but may not give adirect correlation with part performance under actual serviceconditions.It yields comparative data on which to basejudgement on expected service quality.5.4 This test method is suitable for compliance testing,quality control,and research and development work.6.Test Conditions6.1 TemperatureUnless otherwise specified between theproducer and the purchaser,the preferred test temperature shallbe 70 6 2C.6.1.1 If the temperature of the testing room is other than thestandard 23 6 2C,the actual room temperature and any effecton the temperature of the test liqu