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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Heat curing of the adhesive may be used, keeping in mind considerations noted in 9. In either case, cracks are not indicative b5711 poor adhesion unless the coating can be peeled back with a sharp instrument.
Rated to 10 kN 2, lbf Can be paired with adapters to yield non-perpendicular peels Maintains constant peel angle throughout the test. Such cracks may or may not propagate into the substrate. Lifting satm peeling is evidence of unsatisfactory adhesion. Such adhesion is usually obtained if good electroplating practices are followed.
Your comments are invited either for revision of this aastm or for additional standards and should be addressed to ASTM International Headquarters. Work Item s – proposed revisions of this standard.
ASTM B STANDARD PRACTICE FOR QUALITATIVE ADHESION TESTING OF METALLIC COATINGS_百度文库
Soft and ductile coatings are generally not suited for evaluation. ASTM B This test asttm is a simple set of tests to determine the adhesion of metallic coatings on various substances. A suitable tool is a steel rod 6 mm in diameter with a smooth hemispherical end. Make sure that any loose coating particles from scribing do not remain. Vol 22,p. No other units of measurement are included in this standard.
We are confident that we have what you are looking for. Because the results of tests in cases of marginal adhesion are subject to interpretation, agreement shall be reached on what is acceptable. In scribing the lines, use sufficient pressure to cut through the coating wstm the substrate in a sstm stroke.
ASTM B571 Adhesion Metals Coating Test Equipment
These tests have varying degrees of severity; and one might serve to distinguish between satisfactory and unsatisfactory adhesion in a speci? Blisters, lifting, or peeling should not develop.
Adhesive-backed tape may be considered as a possible alternative.
The choice for each situation must be determined. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
This test is commonly used if the coating will peel without tearing. A knife may be substituted for the chisel with or without hammering or light tapping. 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.
If there is peeling or? Examine the deformed area visually under low magni?
Originally approved in This may be prying, hammering, bending, beating, heating, sawing, grinding, pulling, scribing, chiseling, or a combination of such treatments. Coatings and substrates that are sensitive to oxidation should be heated in an inert or reducing atmosphere or a suitable liquid. If permitted, test panels shall be of the same material and have the same surface finish as the asttm to be tested and shall be processed through the same preplating, electroplating, and postplating cycle with the parts they represent.
ASTM B – ADHESION OF PLATINGS (EXCEPT DRAW TEST)
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. Such adhesion is usually obtained if good electroplating practices are followed. 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.
In many instances, the end use of the coated article or its method of fabrication will suggest the technique that best represents functional requirements. This would not give a correct indication of the as-plated bond strength. A quantitative analysis of the factors involved has been published. These tests have varying degrees of severity; and one might serve to distinguish between satisfactory and unsatisfactory adhesion in a specific application.
For reproducible results, the rate of pull, the thickness and width of the strip, and deposit thickness must be standardized. The adhesion of the coating may be observed directly or evaluated further by techniques described in Section 5 for detachment from the substrate. This standard has been approved for use by agencies of the Department of Defense.