What physical property does the Brestle Test evaluate in coatings?

The Brestle Test specifically evaluates the adhesion strength of coatings by assessing their resistance to blistering or peeling when subjected to moisture. Adhesion is crucial in determining how well a coating will perform when applied to a substrate. This test is used to simulate conditions that might lead to moisture entrapment, which can promote corrosion or failure of the coating.

By utilizing this test, inspectors can gain insights into the coating's ability to stay bonded under conditions where moisture might compromise its longevity and effectiveness. While conductivity and soluble salts are important factors to consider in the overall performance of coatings, they are not the focus of the Brestle Test. Instead, the emphasis here is entirely on adhesion strength, which impacts the coating's durability and suitability for protective applications.