Crevice Corrosion

Crevices in S30400 stainless steel

... after 30 days in 0.5 FeCl3 + 0.05 M NaCl

ASTM G 78 test

The number of sites showing attack in a given time can be related to the resistance of a material to initiation of localized corrosion, and the average or maximum depth of attack can be related to the rate of propagation. The large number of sites in duplicate or triplicate specimens is amenable to probabilistic evaluation.

Corrosion Doctors in action