【作者】 王健星； 柳伟； 董宝军； 范玥铭； 李世民； Thee Chowwanonthapunya； 李晓刚；

【Author】 Wang Jianxing;Liu Wei;Dong Baojun;Fan Yueming;Li Shimin;Thee Chowwanonthapunya;Li Xiaogang;Corrosion and protection Center, University of Science and Technology Beijing;Faculty of International Maritime Studies, Kasetsart University,Sriracha Campus;

【机构】 北京科技大学腐蚀与防护中心； Faculty of International Maritime Studies, Kasetsart University,Sriracha Campus；

【摘要】 对比研究了Q345B、0.75%Ni和3%Ni钢的初期腐蚀性能,并分析了钢的腐蚀电化学行为和腐蚀微观形貌。结果表明:0.75%Ni和3%Ni钢腐蚀速率显著低于普碳钢Q345B,随着Ni元素含量的增大,钢的自腐蚀电位E_corr增大,自腐蚀电流i_corr和阴极塔菲尔斜率b_c均呈减小;锈层电阻R_r和电荷传递电阻R_ct均呈现增大趋势。实验48h后,Q345B钢表面出现裂纹,而3%Ni钢腐蚀轻微;同时Ni元素可以提高了锈层对Cl-扩散传输的阻力,钢的耐蚀性得到提高。更多还原

【Abstract】 The initial corrosion performance of Q345 B, 0.75%Ni and 3%Ni steel and the corrosion electrochemical behavior and corrosion morphology were compared. The results show that the corrosion rates of 0.75% Ni and 3% Ni steels were significantly lower than that of carbon steel Q345B. With the increase of Ni content, the corrosion potential E_corr of the steels increased, the corrosion current i_corr and cathode Tafel slope b_c were reduced; Simultaneously, the rust layer resistance R_r and the charge transfer resistance R_ct both showed an increasing trend. After 48 h of experiment, cracks appeared on the surface of Q345B steel, while the corrosion of 3% Ni steel was slight. At the same time, Ni element increased the resistance of rust layer to Cl-diffusion transmission, and the corrosion resistance of steel was improved.更多还原