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

In either case, cracks are not indicative of poor adhesion unless the coating can be peeled back with astmm sharp instrument. No other units of measurement are included in this standard. If more than one test is used, failure to pass any one test is considered unsatisfactory. 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.

ASTM B571 Adhesion Metals Coating Test Equipment

These limitations are noted generally in the test descriptions and are summarized in Table 1 for certain metallic coatings. Because the results of tests in cases of marginal adhesion are subject to interpretation, agreement shall be reached on what is acceptable.

Precision and Bias Alternatively the b5571 may be placed in back of satm overhang area of the coating or at a coatingsubstrate interface exposed by sectioning the article with a saw. ASTM B This test practice is a simple set of tests to determine the adhesion of metallic coatings on various substances.

ASTM B – ADHESION OF PLATINGS (EXCEPT DRAW TEST)

In many instances, the astj use of the coated article or its method of fabrication will suggest the technique that best represents functional requirements. We are confident that we have what you are looking for. A number in parentheses indicates the year of last reapproval. The adhesion is not adequate if the tape has deposit adhering to it that comes from the area between the scribed lines. Coatings and substrates that are sensitive to oxidation should be heated in an inert or reducing atmosphere or a suitable liquid.

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A hack saw may be substituted for the wheel, making sure to saw in the direction that zstm to separate the coating from the substrate. Such cracks may or may not propagate into the substrate. In scribing the lines, use sufficient pressure to cut through the coating to the substrate in a single stroke. These tests have varying degrees of severity; and one might serve to distinguish between satisfactory and unsatisfactory adhesion in a speci? Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

ASTM B quantifies various physical properties of metal coating substances such as gold, copper, silver and several others on their adhesion quality via various methods for quality standards comparisons. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

A quantitative analysis of the factors involved awtm been published. A suitable tool is a steel rod 6 mm in diameter with a smooth hemispherical end.

Adhesive-backed tape may be considered as a possible alternative.

Generally, thick deposits cannot be evaluated satisfactorily. These tests have varying degrees of severity; and one might serve to distinguish between satisfactory and unsatisfactory adhesion in a specific application. If there is peeling or? Such adhesion is usually obtained if good electroplating practices are followed. Examine the deformed area visually under low magni? Last previous edition approved in as B — 97 The tape shall be wide enough to cover three or more parallel lines of the scribed area.

Such adhesion is usually obtained if good electroplating practices are followed. These limitations are noted generally in the test descriptions and are summarized in Table 1 for certain metallic coatings. This test practice is a simple set of tests to determine the adhesion of metallic coatings on various substances.

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If permitted, test panels shall be of the same material and have the same surface? Prying with a sharp blade will indicate unsatisfactory adhesion by lift off of the coating. If it is possible to remove the deposit, the adhesion is not satisfactory.

If a part requires baking or heat treating after plating, adhesion tests should be carried out after such posttreatment as well. If any portion of coating between the lines breaks away from the substrate, the adhesion is inadequate.

The pressure shall be sufficient to burnish the coating at each stroke but not so great as to dig into it. Examine the region aztm low magni?

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. Vol 22,p.

If permitted, test panels shall be of the same material and satm 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. The standard describes several different tests and tables to compare different metallic coatings for a given application. Link to Active This link will always route to the current Active version of the standard. We offer machines, apparatus, testers, tensile grips, test fixtures, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, furnaces, baths and custom solutions for unique applications.

This test is commonly used if the coating will peel without tearing. For reproducible results, the rate of pull, the thickness and width of the strip, and deposit thickness must be standardized. This would not give a correct indication of the as-plated bond strength.