ASTM_D_6284_-_17.pdf

Designation:D628417Standard 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 chlorinecompounds,including hypochlorous acid(HOCl),hypochlo-rite ions(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.1.5 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:2D471 Test Method for Rubber PropertyEffect of LiquidsD1193 Specification for Reagent WaterD1253 Test Method for Residual Chlorine in WaterD1415 Test Method for Rubber PropertyInternationalHardnessD2240 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 ManufacturingIndustriesD6284 Test Method for Rubber PropertyEffect of Aque-ous Solutions with Available Chlorine and ChloramineD6855 Test Method for Determination of Turbidity Below 5NTU in Static Mode3.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.1This test method is under the jurisdiction of ASTM Committee D11 on Rubberand Rubber-like Materials and is the direct responsibility of Subcommittee D11.40on Consumer Rubber Products.Current edition approved Jan.1,2017.Published April 2017.Originallyapproved in 1998.Last previous edition approved in 2009 as D6284 09.DOI:10.1520/D6284-17.2For 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 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.5.2 Properties of rubber articles can deteriorate as a result ofexposure to water containing thes