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Corrosion resistance and corrosion behavior of high‐copper‐bearing steel in marine environments
Author(s) -
Liu Hongyu,
Teng Yingxue,
Guo Jing,
Li Na,
Wang Jiaji,
Zhou Ziting,
Li Shengli
Publication year - 2021
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.202012111
Subject(s) - corrosion , materials science , metallurgy , dielectric spectroscopy , copper , bearing (navigation) , electrochemistry , scanning electron microscope , polarization (electrochemistry) , carbon steel , rust (programming language) , composite material , chemistry , electrode , cartography , computer science , programming language , geography
Thus far, research on the corrosion resistance of copper‐containing steel has been limited to Cu content of less than 1%, and the corrosion resistance of antibacterial Cu‐containing steel with Cu content above 3% has not been reported. In this study, 0Cu3 carbon steel (CS), 0Cr15Cu3 stainless steel (SS), and Q345 CS were investigated. The corrosion resistance and corrosive behavior of high‐copper (high‐Cu)‐bearing steel in a marine environment were examined by scanning electron microscopy, energy dispersive spectrometry, X‐ray diffraction, electrochemical impedance spectroscopy, and potentiodynamic polarization. Coupon test results showed that the Cu in the 0Cr15Cu3 SS and 0Cu3 CS can promote the formation of stable α‐FeOOH from γ‐FeOOH in the outer rust layers, and make the rust layers more thick and dense. In the electrochemical experiment, the impedance loop diameters and R ct values of the 0Cr15Cu3 SS and 0Cu3 CS were higher than those of Q345, while the I corr was less than that of Q345, which indicates that the anticorrosion property of these two types of high‐Cu‐bearing steel was higher than that of Q345. The aim of this study was to define the properties of corrosion resistance and corrosive behavior in high‐Cu‐bearing steels to promote their application in marine engineering.