1、Designation:D570218Standard Practice forField Sampling of Coating Films for Analysis for HeavyMetals1This standard is issued under the fixed designation D5702;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.
2、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 practice covers a method to control the removal ofsamples of coating films from substrates for subsequent labo-ratory analysis for h
3、eavy metal content on a mass basis.Thistechnique can be used in the field,the fabricating shop,orlaboratory.1.2 The values stated in SI units are to be regarded as thestandard.The values in parentheses are for information only.1.3 This standard does not purport to address all of thesafety concerns,i
4、f any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.For specific hazard information,see Section 5,Note 1,andNote 3.1.4 This inter
5、national 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)Comm
6、ittee.2.Referenced Documents2.1 ASTM Standards:2D4138 Practices for Measurement of Dry Film Thickness ofProtective Coating Systems by Destructive,Cross-Sectioning MeansD6132 Test Method for Nondestructive Measurement of DryFilm Thickness of Applied Organic Coatings Using anUltrasonic Coating Thickne
7、ss GageD7091 Practice for Nondestructive Measurement of DryFilm Thickness of Nonmagnetic Coatings Applied toFerrous Metals and Nonmagnetic,Nonconductive Coat-ings Applied to Non-Ferrous Metals3.Significance and Use3.1 Prior to beginning a project that involves the removal,cutting,grinding,or burning
8、 of paint,it is necessary todetermine if the coating contains hazardous metals,such aslead.If it does,certain requirements for worker and environ-mental protection may need to be imposed.The presence andquantity of hazardous metals in a paint can be determinedthrough laboratory analysis.Proper sampl
9、ing protocol isneeded to assure the laboratory results represent the actualamount of heavy metal in the coating.The number and locationof samples to be removed must also be determined to charac-terize properly the extent of the presence of hazardousmaterials,if any,on a structure.4.Materials and Equ
10、ipment4.1 Sample Collection ContainerA clean plastic bag orrigid container comprised of a material such as polyethylenethat will not contaminate the sample.4.2 Straight Edge or Ruler.4.3 Knife or Chisel,cleaned and sharpened,for removingpaint samples.4.4 Dry Film Thickness Gage,for measuring total c
11、oatingthickness.5.Procedure5.1 Select a sufficient number of areas for coating removalthat properly characterize the coatings on the structure.5.1.1 Selection may be based on painting history,knowl-edge of previously applied coatings,prior touch-up and re-painting programs,and other such factors.5.1
12、.2 Select areas that properly characterize the range ofthickness found.Dry film thickness can be measured inaccordance with Test Methods D4138,D6132,or PracticeD7091.5.1.3 Remove a minimum of three samples.5.2 At each sample site,clean the surface of dirt,dust,ordebris.1This practice is under the ju
13、risdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.46 on Industrial Protective Coatings.Current edition approved June 1,2018.Published June 2018.Originallyapproved in 1995.Last previous edition approved in 2012
14、 as D5702 07(2012).DOI:10.1520/D5702-18.2For 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 Internation
15、al,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 R
16、ecommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 NOTE1Hazardous materials can be present in surface debris andchalk which may be removed during cleaning.Thus,consideration shouldbe given to collecting this surface debris and chalk for analysis.5.3 At each sample site,use a knife and straight edge toscribe the perimeter of a square through the coating film to thesubstrate.The square should be of sufficient size to give a onegram sample.NOTE2Paint w
