4. Forms of Corrosion

4.6 Stress Corrosion Cracking [3/4]

Mechanism of SCC

The mechanism of SCC is a widely debated topic and several volumes have been written on this subject. A discussion of mechanisms is beyond the scope of this presentation. However, a summary of important mechanism is given below.

Typical cleavage fracture in iron.

A sample picture is presented below. The figure shows the rupture of the film on alloy surface by tensile forces and advancement of the crack.