ASTM C633 Adhesion or Cohesion Strength of Thermal Spray Coatings Test Machine

ASTM C633 – 13(2017) : Standard Test Method for Adhesion or Cohesion Strength of Thermal Spray Coatings

This test method covers the determination of the degree of adhesion (bonding strength) of a coating to a substrate or the cohesion strength of the coating in a tension normal to the surface.

The test consists of coating one face of a substrate fixture, bonding this coating to the face of a loading fixture, and subjecting this assembly of coating and fixtures to a tensile load normal to the plane of the coating.

It is adapted particularly for testing coatings applied by thermal spray, which is defined to include the combustion flame, plasma arc, two-wire arc, high-velocity oxygen fuel, and detonation processes for spraying feedstock, which may be in the form of, wire, rod, or powder.