September 15, 2023
The brittleness of the coating is an important indicator of the physical properties of the coating. The existence of brittleness often leads to cracking of the coating, reduced bonding strength, and even directly affects the use value of the plated parts.
The brittleness of the coating is generally tested by deforming the sample under the action of external force until cracks occur in the coating, and then the degree of deformation or deflection value when cracks occur in the coating is used as the basis for evaluating the brittleness of the coating.
Methods for measuring the brittleness of coatings include cupping method, static pressure deflection method, etc. Methods for measuring coating toughness include mandrel deflection method, etc.