Corrosion is an electro-chemical process which transforms steel influenced by oxygen and water, in iron hydroxyde (rust). Corrosion is most often caused when steel is exposed to atmospheric conditions, such as salt, moisture, and oxygen. A protective coating to the steel required to prevent corrosion.

Cause

• Chemically polluted substrate
• Bad pretreatment, e.g. failed to remove mill scale
• Insufficient active corrosion resistance of applied products
• Insufficient dry layer thickness
• Mechanical damage