Coating Adhesion

Published: | Updated: July 15, 2019

Definition - 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.

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