ISO-14001
Corrosion

Chemical transformation due to environmental effects

During corrosion a material’s characteristics change due to the environmental effects it is exposed to. The most common form of corrosion is when the air’s oxygen- and watercontent corrodes metal surfaces. This causes iron surfaces to rust and copper to develop a green covering layer. Corrosion may attack ceramics and plastics as well.

Corrosion deteriorates the quality of materials, as the materials formed as a result of corrosion (oxides and salts) have properties inferior to those of the original material by far. Corrosion products are worn away easily, but this also causes the metal to become gradually thinner. Even holes may form in metal plates as a result of corrosion.

The other problem caused by corrosion is that the volume of the end products of corrosion is considerably greater that that of the metal. Corroded materials therefore disintegrate and the structure may collapse. Disintegrating concrete is a good example of this.

 

Risks and costs

Corrosion may also represent a safety risk, e.g. when load bearing structures are exposed to it. The damage caused by corrosion is sometimes very expensive to repair.

Sometimes corrosion forms a resistant metallic oxide layer that prohibits further corrosion. This explains why the corrosion of aluminum is so weak despite the metal being highly sensitive to corrosion as a chemical element.

 

Upon designing hose clamps, preventing corrosion is an important consideration for MPC Industries.

 

Source: Wikipedia