Pitting Corrosion of Stainless Steel 430 in the Presence of Thin MgCl₂ Solution Films: Effects of Film Diameter and Thickness

抄録

The pitting corrosion of Type 430 stainless steel under thin MgCl₂ solution films was investigated under different relative humidities (RHs) to clarify the effect of film dimensions on this property. Thickness and diameter of the solution film were varied within 1–70 µm and 1–13 mm, respectively. No pitting corrosion was detected above 85% RH for all films dimensions. Below 75% RH, the probability of pitting corrosion occurrence decreased with decreasing diameter and thickness. No pit growth occurred when the diameter was approximately 1 mm.