Effect of trace boron on corrosion resistance of rust layer of highstrength low-alloy steel in 3.5 wt.% NaCl solution
Yan-hui Hou1,2, Ze-kun Xu1,2, Guang-qiang Li1,2
1 The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China 2 Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
Effect of trace boron on corrosion resistance of rust layer of highstrength low-alloy steel in 3.5 wt.% NaCl solution
Yan-hui Hou1,2, Ze-kun Xu1,2, Guang-qiang Li1,2
1 The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China 2 Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
摘要 The influence mechanism of trace boron on the corrosion resistance of high-strength low-alloy (HSLA) steel in a simulated marine environment was studied by combining first-principles calculation with experiment. The effect of boron on the corrosion properties and corrosion morphology of the rust layer formed on the surface of HSLA steel was studied by means of corrosion weightlessness method, polarization curve, scanning electron microscopy (SEM) and X-ray diffraction (XRD) technique. The mass loss measurements and polarization curves revealed that the corrosion resistance of HSLA steel is improved by adding trace boron. XRD and SEM results show that the rust layer is produced by α-FeOOH (the main protective phase), Fe3O4 and γ-FeOOH, and boron contributes to stability of α-FeOOH. Based on the first-principles calculation, the solid solution of B atom in the corrosion product is beneficial to the fixation of Cl atom and to the reduction of the corrosion of Cl atom to the steel matrix.
Abstract：The influence mechanism of trace boron on the corrosion resistance of high-strength low-alloy (HSLA) steel in a simulated marine environment was studied by combining first-principles calculation with experiment. The effect of boron on the corrosion properties and corrosion morphology of the rust layer formed on the surface of HSLA steel was studied by means of corrosion weightlessness method, polarization curve, scanning electron microscopy (SEM) and X-ray diffraction (XRD) technique. The mass loss measurements and polarization curves revealed that the corrosion resistance of HSLA steel is improved by adding trace boron. XRD and SEM results show that the rust layer is produced by α-FeOOH (the main protective phase), Fe3O4 and γ-FeOOH, and boron contributes to stability of α-FeOOH. Based on the first-principles calculation, the solid solution of B atom in the corrosion product is beneficial to the fixation of Cl atom and to the reduction of the corrosion of Cl atom to the steel matrix.
Yan-hui Hou,Ze-kun Xu,Guang-qiang Li. Effect of trace boron on corrosion resistance of rust layer of highstrength low-alloy steel in 3.5 wt.% NaCl solution[J]. Journal of Iron and Steel Research International, 2023, 30(10): 2080-2090.
2023, Vol. 30 
