1 Scope
This document specifies a method to test for intergranular corrosion (IGC) in austenitic
stainless steels using an oxalic acid etch. This method can evaluate non- sensitization of austenitic stainless steels by observing the structure of the etched surface with
a microscope after performing electrolytic etching (hereinafter called “etching”)
on austenitic stainless steel in an oxalic acid solution.