Abstract
Corrosion behavior of CrN coating by an arc ion plating on type 304 stainless steel in demineralized water at 286°C was studied using the circulating type experimental loop. Exposure tests were carried out under three different dissolved O2 concentrations of 150μg/l, 500μg/l and 1, 000μg/l, respectively. Corroded surface was observed by SEM, XPS and GDLS. The weight loss of specimen after exposure decreased with exposure time linearly. The corrosion weight increased proportionally with an increase of dissolved O2 concentration. It was assumed that the dissolved O2 became a dominant factor for corrosion of CrN in high-temperature demineralized water.
