ASTM B571 PDF


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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ASTM B STANDARD PRACTICE FOR QUALITATIVE ADHESION TESTING OF METALLIC COATINGS_百度文库

Work Item s – proposed revisions of this standard. If more than one test is used, failure to pass any one test is considered unsatisfactory.

If there is peeling or? These tests have varying degrees of severity; and one might serve to distinguish between satisfactory and unsatisfactory adhesion in a specific application.

Examine the deformed area visually under low magni? Make sure that any loose coating particles from scribing do not remain.

Examine the region at low magni? Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Coatings and substrates that are sensitive to oxidation should be heated in an inert or reducing atmosphere or a suitable liquid.

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. These limitations are noted generally in the test descriptions and are summarized in Table 1 for certain metallic coatings.

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If it is possible to remove the deposit, the adhesion is not satisfactory. A suitable tool is a steel rod 6 mm astk diameter with a smooth hemispherical end. The standard describes several different tests and tables to compare different metallic coatings for a given application.

These tests have varying degrees of severity; and one might serve to distinguish between satisfactory and unsatisfactory adhesion in a speci? A number in parentheses indicates the year of aastm reapproval. This would not give a correct indication of the as-plated bond strength.

If the coating fractures or blisters, a sharp blade may be used to attempt to lift off the coating. This test practice is a simple set of tests to determine the adhesion of metallic coatings on various substances.

This standard has been approved for use by agencies of the Department of Defense. Then quench the part in water or other suitable liquid at room temperature. 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. The choice for each xstm must be determined. Deposit continuous to the scribed lines is not considered.

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ASTM B Adhesion Metals Coating Test Equipment

Lifting or peeling is evidence of unsatisfactory adhesion. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Current edition approved April 1, If permitted, test panels shall be of the same material and have the same surface?

The adhesion is not adequate if ast, tape has deposit adhering to it that comes from the area between the scribed lines. If more than one test is used, failure to pass any one test is considered unsatisfactory.

ASTM B571 Adhesion Metals Coating Test Equipment

Soft or thin coatings cannot be evaluated for adhesion by this method. Such adhesion is usually obtained if good electroplating practices are followed. Blisters, lifting, or peeling should not develop. This may be prying, hammering, bending, beating, heating, sawing, grinding, pulling, scribing, chiseling, or a combination of such treatments. Because the results atm tests in cases of marginal adhesion are subject to interpretation, agreement shall be reached on what is acceptable.

In either case, cracks are not indicative 5b71 poor adhesion unless the coating can be peeled back with a sharp instrument.