Corrosion evolution and stress corrosion cracking behavior of a low carbon bainite steel in the marine environments: Effect of the marine zones
Huiyun Tian, Zhongyu Cui, Heng Ma, Peilin Zhao, Maoxin Yan, Xin Wang, Hongzhi Cui
Abstract
The effect of electrolyte presence form on the corrosion evolution and stress corrosion cracking (SCC) behavior of E690 steel in the simulated marine environment is investigated. The steel exhibits the highest and lowest corrosion rate in splash and immersion environment, respectively, attributed to the differences in oxygen availability, rust layer property, and scour stress. γ-FeOOH dominates the rust formed in atmospheric environment, while Fe 3 O 4 prevails in the splash environment. The steel corroded in splash environment exhibits the high pit number density, high maximum pit depth, and high cathodic reaction activity, resulting in the most severe SCC degradation.