CORROSION

Stress Corrosion Corrosion Fatigue Fretting Corrosion Heat Treatment

Corrosion Control

Metal corrosion is the deterioration of the metal by chemical or electrochemical attack and can take place internally as well as on the surface. As in the rotting of wood, this deterioration may change the smooth surface, weaken the interior, or damage or loosen adjacent parts.

Forms of Corrosion

Type of Corrosion

Corrosion Control

Corrosion Removal

Preventive Maint.

Water or water vapor containing salt combine with oxygen in the atmosphere to produce the main source of corrosion in aircraft. Aircraft operating in a marine environment or in areas where the atmosphere contains industrial fumes which are corrosive are particularly susceptible to corrosive attack. Corrosion can cause eventual structural failure if left unchecked. The appearance of the corrosion varies with the metal. On aluminum alloys and magnesium it appears as surface pitting and etching, often combined with a gray or white powdery deposit. On copper and copper alloys the corrosion a greenish film, on steel a reddish rust. When the gray, while, green, or reddish deposits are removed, each of the surfaces may appear etched and pitted, depending upon the length of exposure and severity of attack. If these surface pits are not too deep,they may not significantly alter the stregth of the metal, however, the pits may become sites for crack development. Some types of corrosion can travel beneath surface coatings and can spread until the part fails.

Common Corrosive

List of Agent

Bugs