抗压容器钢在模拟工业码头大气环境下的腐蚀行为研究

Study on Corrosion Behavior of Pressure Vessel Steel in Simulated Industrial Wharf Atmospheric Environment

为探究抗压容器钢在模拟工业码头大气环境下的腐蚀行为,利用失重分析、EDS、XRD和电化学方法研究了不同模拟加速试验周期下抗压容器钢Q235和16MnNiVR钢的腐蚀行为。结果表明:抗压容器钢Q235和16MnNiVR钢在模拟工业海洋大气环境试验中,其腐蚀速率先呈现上升趋势,随着锈层由疏松逐渐变致密,腐蚀速率会发生不同程度地下降。在此加速试验下2种钢的腐蚀产物化学性质一致,所发生的腐蚀行为差异是由金属基材表面腐蚀产物致密性所致,在东南沿海工业海洋大气环境腐蚀因子作用下,16MnNiVR钢的耐蚀性可达到Q235钢的1.6倍。

For studying the corrosion behavior of pressure vessel steel in simulated industrial marine atmospheric environment, the weight loss analysis, EDS, XRD and electrochemical methods were used to study the corrosion behavior of pressure vessel steel Q235 and 16MnNiVR under different simulated accelerated test cycles. Results showed that in the simulated industrial marine atmospheric environment, the corrosion rate of pressure vessel steel Q235 and 16MnNiVR first exhibited an upward trend. As the rust layer gradually changed from loose to dense, the corrosion rate would decrease to varying degrees. Under this accelerated test, the chemical properties of the corrosion products of the two steels were consistent, and the difference in corrosion behavior was caused by the compactness of the corrosion products on the surface of the metal substrate. Besides, the corrosion resistance of 16MnNiVR steel could reach 1.6 times of that of Q235 steel under the action of corrosion factor of industrial marine atmosphere environment in the southeast coast.