ASTM D5702-2018 red 9375 Standard Practice for Field Sampling of Coating Films for Analysis for Heavy Metals.pdf

1、Designation: D5702 07 (Reapproved 2012)D5702 18Standard 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 revis

2、ion, 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 practice covers a method to control the removal of samples of coating films from substrates for

3、subsequent laboratoryanalysis for heavy metal content on a mass basis. This technique can be used in the field, the fabricating shop, or laboratory.1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.1.3 This standard does not purp

4、ort to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine theapplicability of regulatory limitations prior to use. For specific hazar

5、d information, see Section 5, Note 1,and Note 3.1.4 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the W

6、orld Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D4138 Practices for Measurement of Dry Film Thickness of Protective Coating Systems by Destructive, Cross-SectioningMeansD6132 Test Method for Nondestructive Measurement of Dry Film Thickne

7、ss of Applied Organic Coatings Using an UltrasonicCoating Thickness GageD7091 Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metalsand Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals3. Significance and Use3.1 Prior to beginn

8、ing a project that involves the removal, cutting, grinding, or burning of paint, it is necessary to determineif the coating contains hazardous materials,metals, such as lead, as lead. If it does, certain requirements for worker andenvironmental protection may need to be imposed. The presence and qua

9、ntity of hazardous materialsmetals in a paint can bedetermined through laboratory analysis; however, since the analysis is based on the weight of the specimen, the removal of thesample must be properly controlled to improve the reliability of the test results. analysis. Proper sampling protocol is n

10、eeded toassure the laboratory results represent the actual amount of heavy metal in the coating. The number and location of samples to beremoved must also be determined to characterize properly the extent of the presence of hazardous materials, if any, on a structure.4. Materials and Equipment4.1 Sa

11、mple Collection ContainerA clean plastic bag or rigid container comprised of a material such as polyethylene that willnot contaminate the sample.4.2 Straight Edge or Ruler.4.3 Knife or Chisel, cleaned and sharpened, for removing paint samples.4.4 Dry Film Thickness Gage, for measuring total coating

12、thickness.1 This practice is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.46 on Industrial Protective Coatings.Current edition approved Nov. 1, 2012June 1, 2018. Published November 2012June

13、 2018. Originally approved in 1995. Last previous edition approved in 20072012 asD5702 07.D5702 07 (2012). DOI: 10.1520/D5702-07R12.10.1520/D5702-18.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standa

14、rdsvolume information, refer to the standardsstandards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically p

15、ossible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700,

16、 West Conshohocken, PA 19428-2959. United States15. Procedure5.1 Select a sufficient number of areas for coating removal that properly characterize the coatings on the structure.5.1.1 Selection may be based on painting history, knowledge of previously applied coatings, prior touch-up and repaintingp

17、rograms, and other such factors.5.1.2 Select areas that properly characterize the range of thickness found. Dry film thickness can be measured in accordancewith Test Methods D4138, D6132, or Practice D7091.5.1.3 Remove a minimum of three samples.5.2 At each sample site, clean the surface of dirt, du

18、st, or debris.D5702 182NOTE 1Hazardous materials can be present in surface debris and chalk which may be removed during cleaning. Thus, consideration should be givento collecting this surface debris and chalk for analysis.5.3 At each sample site, use a knife and straight edge to scribe the perimeter

19、 of a square through the coating film to the substrate.The square should be of sufficient size to give a one gram sample.NOTE 2Paint with a density of 1.5 g/cm3 and 250 microns (10 mils) thick will generate one gram of sample in a square that is 5 cm (2 in.) on a sideassuming 100 percent of the mate

20、rial is collected. Paint density normally ranges from 1.1 to 2.5 g/cm3.Adjust the sample size based on density, thicknessand collection efficiency.5.4 Remove essentially all of the coating within the square down to the substrate by scraping, by making closely-spaced parallelscribes to disbond ribbon

21、s of the coating, or other controlled means that permit collection of all of the film scrapings. Take extremecare to remove the coating to the substrate, but avoid including portions of the substrate itself in the sample. Place all chips andscrapings in the sample bag or container.NOTE 3The controll

22、ed application of heat to the sample area may assist in paint removal, but health and safety concerns must be carefully addressedbefore using such methods.5.5 Seal the sample bag or container, tape shut to avoid accidental or unauthorized opening, and complete the information asdesignated in Section

23、 6.6. Report6.1 Sample ContainersReport the following minimum information on each sample container: ContainersReport thefollowing minimum information on each sample container:6.1.1 Identification number (This is a unique number assigned to each sample.).6.1.2 Date and time of sampling.6.1.3 Project

24、name and location.6.1.4 Identification of the item or location where the sample was taken.6.1.5 Name and signature of technician removing sample.6.2 Chain of Custody FormReport the following minimum information: FormReport the following minimum information:6.2.1 Project name and location.6.2.2 Name

25、of technician removing sample.6.2.3 Unique sample number, date and time of sample removal, and specific location from which sample is removed.6.2.4 The laboratory analysis specified for each component (for example, lead, chromium, etc., as required in the contractdocuments, or as agreed upon between

26、 purchaser and seller). Caution the laboratory that fragments of the substrate, if includedin the sample, should be removed prior to analysis.6.2.5 Signatures and dates for each transfer of the samples from the technician through the carrier(s) to the laboratory receivingthe samples.7. Keywords7.1 c

27、oating film sampling; coating film identification; hazardous elements; heavy metals; paint film identification; paint filmsampling; samplingASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this

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