- TOP
- Characteristics
- Difference of Anti-corrosion Mechanisms
＜Early stage of exposure＞
Anti-corrosion by barrier protection
Paint film provides protection to a metal surface by shielding it from water/air.
A protective barrier deteriorates with exposure.
Rust will develop and creep under the paint film.
Anti-corrosion by electrochemical reaction of zinc
Zinc results in a self-sacrificing cathodic protection to a metal surface upon direct contact.
＜Early stage of exposure＞
Water may penetrate through the zinc dusts on the steel surfaces, but the steel is protected by the electrochemical reaction of zinc.
Oxidized zinc film acts as a protective barrier against air and moisture improving anti-corrosion performance.
If rust should develop on damaged or thinly covered surfaces, electrochemical reaction prevents rust from creeping under the paint film.
