The mechanism of the protective action of coatings
The ability of coating to prevent or slow down the corrosion of the metal is determined by five major groups of its properties:
1. barrier;
2. adhesive;
3. dielectric;
4. passivating;
5. physical and mechanical.
Different sources give different assessments to the effect of these properties on the overall effect of the protective action. Some prefer the barrier properties, while others believe that the most important ones are adhesive strength, etc. In fact, the protective properties of the coating are determined by a complex of the above properties, which also provide other mutual influence. For different coatings various properties or their combinations may predominate.
