REPRODUCIBLE PITTING CORROSION OF MILD STEEL IN SODIUM CHLORIDE/SODIUM NITRITE ENVIRONMENTS

摘要

This paper presents a technique in which pits can be produced reproducibly on mild steel surfaces in 24 hours. The corrosion of mild steel on exposure to solutions of varying molar ratios of sodium chloride (NaCl) to sodium nitrite (NaNO_2) has been studied and as a result reproducible pitting corrosion on mild steel surfaces can be produced in 24 hours through galvanostatically polarising mild steel in a solution of 3.5% sodium chloride with the addition of sodium nitrite at a molar (M) ratio of 15:1. Other molar ratios of sodium chloride to sodium nitrite were also studied and are reported in this chapter.