Corrosion of Mild Steel in the Tidal Water of the Thames Estuary. III. Results of 3 and 5 years’ Immersion

Abstract

Bare mild steel specimens have been exposed in the waters of the Thames Estuary for a total time of 5 years. Comparison of results with those already reported for shorter times shows a general decrease with time in both the overall rates of corrosion (weight loss) and pitting. Although there is anaerobic (microbiological) attack, it is thought to be relatively unimportant even though the rates are highest in the more polluted reaches of the river. It is suggested that continued reduction in pollution of water may result in an increase in the rate of corrosion, and that short-term exposure tests in the river might usefully be established as a routine.