1991 Volume 40 Issue 11 Pages 747-753
To clarify the physical meaning of general corrosion resistance index (GI) obtained through the alloy contents on general corrosion rate of stainless steels in sulfuric acid solution, the study of the effect of alloy contents, immersion time and temperature on the general corrosion rate was carried out in 10.2mol·kg-1 sulfuric acid solution. It was assured that dependence of alloy contents on corrosion rate of stainless steels was ascribed to the apparent activation energy obtained by Arrhenius plot, and from the thermodynamical consideration of GI value, GI was expressed as a function of alloy contents through the change of apparent activation energy due to corrosion reaction.
