What Does Coating Adhesion Mean?
Coating adhesion refers to the minimum force required to completely affix a layer of a corrosion prevention fluid to a metal substrate. A more durable and chemically resistant coating possesses a greater the degree of coating adhesion and therefore corrosion protection.
Corrosionpedia Explains Coating Adhesion
Coating adhesion is often dependent on the following properties of the substrate and fluid interface:
- Atomic bond structure
- Stress forces and elasticity
- Substrate toughness
- Impurity content
- Fluid thickness
In general, these criteria impart good adhesion to some degree. Adhesion is improved by reducing internal stress, surface tension forces and removing surface impurities.
ASTM D4541-17 - Standard Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers is an industrially accepted standard used to evaluate the degree of coating adhesion present in a given application.