ASTM B Standard Practice for Qualitative Adhesion Testing of Metallic Coatings. standard by ASTM International, 08/01/ View all product details. ASTM B quantifies various physical properties of metal coating substances such as gold, copper, silver and several others on their adhesion quality via. ASTM B STANDARD PRACTICE FOR QUALITATIVE ADHESION TESTING OF METALLIC COATINGS_建筑/土木_工程科技_专业资料。.
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Have a question about conducting the test for this standard? Current edition approved April 1, Coatings and substrates that are sensitive to oxidation should be heated in an inert or reducing atmosphere or a suitable liquid.
These limitations are noted generally in the test descriptions and are summarized in Table 1 for certain metallic coatings. This standard has been approved sstm use by agencies of the Department of Defense. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Lifting or peeling is evidence of unsatisfactory adhesion. A hack saw may be substituted for the wheel, making sure to saw in the v571 that tends to separate the coating from the substrate. The adhesion is not adequate if the tape has deposit adhering to it that comes from the area between the scribed lines.
ASTM B571 Adhesion Metals Coating Test Equipment
Exfoliation or blisters in and around indentations are evidence of inadequate adhesion. This may be prying, hammering, bending, beating, heating, sawing, grinding, pulling, scribing, chiseling, or a combination of such treatments.
These tests have varying degrees of severity; and one might serve to distinguish between satisfactory and asm adhesion in a specific application. Examine the deformed area visually under low magni? A quantitative analysis of the adtm involved has been published. Blisters may erupt during the heat and quench test when plating solution is entrapped in substrate surface pits or pores which are bridged by the deposit.
ASTM B – 18 Standard Practice for Qualitative Adhesion Testing of Metallic Coatings
If the deposited coating cannot be peeled or lifted from the substrate in an area adjacent to the blister sthe appearance of blisters should not be interpreted as evidence of inferior adhesion.
In many instances, the end use of the coated article or its method of fabrication will suggest the technique that best represents functional requirements.
Adhesive-backed tape may be qstm as a possible alternative. Work Item s – proposed revisions of this standard. Make sure that any loose coating particles from scribing do not remain. If it is b5711 to remove the deposit, the adhesion is not satisfactory.
If permitted, test panels shall be of the same material and have the same surface finish as the item to be tested and shall be processed through the same preplating, electroplating, and postplating cycle with the parts they represent.
It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. The choice for each situation must be determined.
ASTM B STANDARD PRACTICE FOR QUALITATIVE ADHESION TESTING OF METALLIC COATINGS_百度文库
Vol 22,p. If the coating fractures or blisters, a sharp blade may be used to attempt to lift off the coating. In many instances, the end use of the coated article or its method of fabrication will suggest the technique that best represents functional requirements. A knife may be substituted for the chisel with or without hammering or light b517.
This test practice is a simple set of tests to determine the adhesion of metallic coatings on various substances.
Soft and ductile coatings are generally not suited for evaluation. Deposit continuous to the scribed lines is not considered. If more than one test is used, failure to pass any one test is considered unsatisfactory.
Prying b51 a sharp blade will indicate unsatisfactory adhesion by lift off of the coating. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. For example, an article that is to aztm subsequently formed would suggest a draw or a bend test; an article that astmm to be soldered or otherwise exposed to heat would suggest a heat-quench test.
Precision and Bias For example, an article that is to be subsequently formed would suggest a draw or a bend test; an article that is to be soldered or otherwise exposed to heat would suggest a heat-quench test. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
No other units of measurement are included in this standard. Last previous edition approved in as B — 97 In some cases, a brittle layer may be created by the materials involved causing peeling as a result of fracture rather than poor adhesion. Originally approved in