1、Designation: D 714 02e1Standard Test Method forEvaluating Degree of Blistering of Paints1This standard is issued under the fixed designation D 714; 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 (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.e1NOTEAdjunct references were corrected editorially in April 2006.1. Sc
3、ope1.1 This test method employs photographic reference stan-dards to evaluate the degree of blistering that may developwhen paint systems are subjected to conditions which willcause blistering. While primarily intended for use on metal andother nonporous surfaces, this test method may be used toeval
4、uate blisters on porous surfaces, such as wood, if the sizeof blisters falls within the scope of these reference standards.When the reference standards are used as a specification ofperformance, the permissible degree of blistering of the paintsystem shall be agreed upon by the purchaser and the sel
5、ler.1.2 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.2. Referenc
6、ed Documents2.1 ASTM Adjuncts:Reference Standards for Blistering of Paint Coatings23. Significance and Use3.1 A phenomenon peculiar to painted surfaces is theformation of blisters relative to some system weakness. Thistest method provides a standard procedure of describing thesize and density of the
7、 blisters so that comparisons of severitycan be made.4. Reference Standards4.1 The photographic reference standards are glossy prints.2Figs. 1-4 are reproductions of these standards and are includedto illustrate two characteristics of blistering: size and fre-quency.4.2 SizeReference standards have
8、been selected for foursteps as to size on a numerical scale from 10 to 0, in which No.10 represents no blistering. Blistering standard No. 8 representsthe smallest size blister easily seen by the unaided eye.Blistering standards Nos. 6, 4, and 2 represent progressivelylarger sizes.4.3 FrequencyRefer
9、ence standards have been selected forfour steps in frequency at each step in size, designated asfollows:Dense, D,Medium dense, MD,Medium, M, andFew, F.NOTE 1A quantitative physical description of blistering would in-clude the following characteristics determined by actual count:Size distribution in
10、terms of mensuration units,Frequency of occurrence per unit area,Pattern of distribution over the surface, andShape of blisterFor the usual tests, an actual count is more elaborate than is necessary.5. Procedure5.1 Subject the paint film to the test conditions agreed uponby the purchaser and the sel
11、ler. Then evaluate the paint film forthe degree of blistering by comparison with the photographicreference standards in Figs. 1-4.6. Report6.1 Report blistering as a number (Note 2) designating thesize of the blisters and a qualitative term or symbol indicatingthe frequency.6.2 Intermediate steps in
12、 size or frequency of blisters maybe judged by interpolation.6.3 When the distribution of blisters over the area has anonuniform pattern, use an additional phrase to describe thedistribution, such as “small clusters,” or “large patches.”NOTE 2The number refers to the largest size blister that is num
13、erousenough to be representative of the specimen. For example, photographicstandard No. 4, “Dense,” has blisters ranging in size from about No. 7 toNo. 4, inclusive.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, and Applications and is the
14、direct responsibility ofSubcommittee D01.25 on Evaluation of Weathering Effects.Current edition approved Dec. 10, 2002. Published February 2003. Originallyapproved in 1943. Last previous edition approved in 2000 as D 714 87 (2000).2Glossy prints of the photographic reference standards showing types
15、ofblistering are available from ASTM International Headquarters. Order Adjunct No.ADJD0714. Original adjunct produced in 1986.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.4 The pictorial representations in this standard which ar
16、epublished in the Book of Standards are sufficient in order toconduct the evaluation. It is preferable however, to use theoriginal photographs or drawings when available.7. Keywords7.1 blistering; corrosion; evaluations; reference standardsFew MediumFIG. 1 Blister Size No. 2Medium Dense DenseFIG. 1
17、(continued)D71402e12Few MediumFIG. 2 Blister Size No. 4Dense DenseFIG. 2 (continued)D71402e13Few MediumFIG. 3 Blister Size No. 6Medium Dense DenseFIG. 3 (continued)D71402e14Medium Dense DenseFIG. 4 (continued)Few MediumFIG. 4 Blister size No. 8D71402e15ASTM International takes no position respecting
18、 the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standar
19、d is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International
20、 Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.Thi
21、s standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or 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).D71402e16
