1、Designation:D164901(Reapproved 2019)Standard Specification forStrontium Chromate Pigment1This standard is issued under the fixed designation D1649;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
2、parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the pigment commerciallyknown as strontium chromate which is suitable for use in themanufacture of protective or decorative
3、 coatings.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles
4、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:2D387 Test Method for Color and Strength of ChromaticPigments with a Mechanical MullerD1208 Test Methods
5、for Common Properties of CertainPigmentsD1845 Test Methods for Chemical Analysis of StrontiumChromate Pigment3.Composition and Properties3.1 Dry PigmentThe pigment shall be commercially purestrontium chromate-free of extenders and organic material,except for materials introduced to improve those pro
6、perties forwhich the pigment is used.The pigment shall conform to thefollowing requirements:percentStrontium as SrO,min48Chromium as CrO3,min47Chloride as Cl,max0.1Sulfate as SO3,max0.2Water content,max0.2Coarse particles(total residue retained on No.325(45-m)sieve),max1.03.2 The mass color and char
7、acter of the tint and tintingstrength formed by a mixture with a white pigment shall bewithin mutually agreed upon limits of a standard acceptable toboth the purchaser and the seller when tested in accordancewith Test Method D387.4.Sampling4.1 Two samples shall be taken at random from differentpacka
8、ges from each lot,batch,days pack,or other unit ofproduction in a shipment.When no markings distinguishingbetween units of production appear,samples shall be takenfrom different packages in the ratio of two samples for each4540 kg or 10 000 lb,except that for shipments of less than 10000 lb,two samp
9、les shall be taken.At the option of thepurchaser,the samples may be tested separately or afterblending in equal quantities the samples from the sameproduction unit to form a composite sample.5.Test Methods5.1 Tests shall be conducted in accordance with the appro-priate ASTM test methods.Test procedu
10、res not covered byASTM test methods shall be mutually agreed upon between thepurchaser and the seller.5.1.1 Chemical AnalysisTest Methods D1845.5.1.2 Water ContentTest Methods D1208.6.Keywords6.1 chromate;corrosion inhibitor;pigment;strontium salt1This specification is under the jurisdiction of ASTM
11、 Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.31 on Pigment Specifications.Current edition approved Oct.1,2019.Published October 2019.Originallyapproved in 1959.Last previous edition approved in 2012 as D1649 01(2012).DOI:1
12、0.1520/D1649-01R19.2For 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 Dr
13、ive,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
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