Corrosion of Steels in Marine Atmospheres and in Sea Water

Abstract

Data are presented which show that the corrosion of steels in various atmospheres depends upon the amount and type of pollution and the composition of steel or alloy. Each composition must be tested in different locations for exact comparisons to be made. In sea water, plain and low‐alloy steels are shown to have an average corrosion rate of about 22 mg./dm. 2 /day (0.004 in./yr. average penetration). Pitting attack characterizes the corrosion of stainless steels although the presence of 2% to 3% molybdenum in the 18/8 type or very high alloy content diminishes this tendency.