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ASTM C633
ASTM C633
ASTM C633 is an ASTM International standard that specifies a standardized test for determining the bond strength between a thermal spray coating and a metallic or nonmetallic (substrate) or determining bond strength within the thermal spray layer by conducting a tensile load under a controlled load until failure occurs. It is common in aerospace, automotive, power generation, and equipment manufacturing industries. By providing high performance and precision tensile testing instruments, Presto can help any coating manufacturer to perform ASTM C633 bond strength tests under controlled lab conditions.
Significance
ASTM C633 can be used to evaluate the performance of coatings that are deposited by the various thermal spray processes (both plasma spray, HVOF, flame spray, and arc spray) and is a reliable means for controlling the quality of coatings in various applications, verifying the effects of coating parameters, and using the comparative performance results of the coating as an indicator of its suitability for wear, corrosion, and thermal exposure applications. These quantitative tensile bond strength values and failure modes will help manufacturers optimize spray parameters, verify the effectiveness of surface preparation, and retain the correct performance of the coating during production. Scope ASTM C633 describes the testing of thermal spray coatings for cross-section interlaminar tensile bond strength, interfacial adhesion strength, intracoat cohesive strength, thickness variations in strength, and the effect of substrate preparation and post treatments. It is applicable to thermal spray coating manufacturers, suppliers of aerospace and industrial components, quality inspection laboratories, and research groups working in the surface engineering and thermal spray protective coating application fields and who need a standardized procedure for tensile adhesion testing as a tool for production control, material qualification, and regulation.