Effect of Ca-Mg microalloying on corrosion behavior and corrosion resistance of low alloy steel in the marine atmospheric environment
作者
单位
1Key Laboratory for Corrosion and Protection of the Ministry of Education、Institute of Advanced Materials & Technology、University of Science and Technology Beijing、Beijing、China 2National Materials Corrosion and Protection Data Center、University of Science and Technology Beijing、Beijing、China
关键词
收录来源
International Corrosion Congress · 第22届国际腐蚀大会
摘要
The effect of Ca-Mg microalloying on corrosion behavior of Al deoxidized low alloy steel in the simulated tropical marine atmospheric environments was investigated. The addition improves microstructural characteristics, increasing the corrosion potential by 70±10 mV and decreasing the corrosion rate from 1.66 mm/y to 1.57 mm/y over time. Furthermore, the addition of Ca -Mg has been observed to modify the morphological attributes, population density, dimensional parameters, and electrochemical properties of the prevalent inclusions. This modification is instrumental in shifting the underlying mechanisms that contribute to localized corrosion, which is often precipitated by these inclusions in the steel matrix.