1、Designation:D446202(Reapproved 2012)Standard Specification forZinc Hydroxy Phosphite Pigment1This standard is issued under the fixed designation D4462;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、 in 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 a zinc hydroxy phosphitepigmenthavingthegeneralformulaZnHPO3ZnO2Zn(OH)2.2.Referenced Documents2.1 ASTM Standards:2D185
3、Test Methods for Coarse Particles in PigmentsD280 Test Methods for Hygroscopic Moisture(and OtherMatter Volatile Under the Test Conditions)in PigmentsD281 Test Method for Oil Absorption of Pigments bySpatula Rub-outD4450 Test Method forAnalysis of Zinc Hydroxy PhosphitePigment3.Composition and Prope
4、rties3.1 The pigment shall consist of zinc hydroxy phosphite andshall conform to the requirements in Table 1.3.2 The mass color of the dry pigment is white.The shadeand tinting strength,when specified,shall be within mutuallyagreed upon limits of a reference sample acceptable by thepurchaser and the
5、 seller as tested in an agreed test procedure.4.Sampling4.1 Two samples shall be taken at random from differentpackages 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 packag
6、es,in the ratio of two samples for each10 000 lb(4545 kg),except that for shipments of less than10 000 lb two samples 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 sa
7、mple.5.Test Methods5.1 Tests shall be conducted in accordance with the follow-ingASTM test methods.Test procedures not covered byASTMtest methods shall be mutually agreed upon between thepurchaser and the seller.5.2 Chemical AnalysisTest Method D4450.5.3 Moisture LossDetermine the hygroscopic moistu
8、reloss by Method A of Test Methods D280.5.4 Oil AbsorptionTest Method D281.5.5 Sieve ResidueDetermine the residue on a No.325sieve in accordance with the Procedure for Insoluble DryPigments of Test Methods D185.6.Keywords6.1 phosphorous acid;pigment;zinc;zinc hydroxy phos-phite;zinc oxide1This speci
9、fication is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.31 on Pigment Specifications.Current edition approved Nov.1,2012.Published November 2012.Originallyapproved in 1985.Last previous editi
10、on approved in 2007 as D4462 02(2007).DOI:10.1520/D4462-02R12.2For 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.Copy
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13、or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,which you may attend.If you feel that
14、your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards,at the address shown below.This standard is copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Individual reprints(single o
15、r multiple copies)of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e-mail);or through the ASTM website(www.astm.org).Permission rights to photocopy the standard may also be secured from the ASTM website(www.astm.org/COPYRIGHT/).TABLE 1 Requirements for Zinc Hydroxy Phosphite PigmentMinMaxZinc(as ZnO),%74.779.7Phosphorus(as H3PO3),%18.520.1Moisture,%.1.25Oil absorption,lb/100 lb pigment,%1522Residue,No.325 sieve,%.1.0D4462 02(2012)2