Cerium-tannic acid passivation treatment on galvanized steel
来源期刊：Rare Metals2009年第3期
论文作者：LIU Guangminga, YU Feib, YANG Liua, TIAN Jihonga, and DU Nana a Key Laboratory of Nondestructive Testing (Nanchang Hangkong University), Ministry of Education of China, Nanchang , China b School of Aeronautic and Mechanical Engineering, Nanchang Hangkong University, Nanchang , China
文章页码：284 - 288
摘 要：A novel cerium-tannic acid passivation treatment was performed on galvanized steel. The corrosion resistance of cerium-tannic passivated samples was tested by dropping test with 0.5 wt.% CuSO4 aqueous solution. The mass loss per unit area of passivated samples was measured after the corrosion in 0.5 mol/L NaCl + 0.005 mol/L H2SO4 at room temperature for 96 h. The electrochemical behaviors of cerium, tannic acid, and cerium-tannic acid passivated samples on galvanized steel in 0.5 mol/L NaCl solution were investigated by polarization curves and electrochemical impendence spectra. The corrosion equivalent circuit was established according to the impedance characteristics. The results show that cerium-tannic acid treated samples exhibit better corrosion resistance than the sole cerium or tannic acid treated samples under the same condition. The mechanism of synergistic effect for cerium-tannic acid passivation on galvanized steel was discussed.
LIU Guangminga, YU Feib, YANG Liua, TIAN Jihonga, and DU Nana a Key Laboratory of Nondestructive Testing (Nanchang Hangkong University), Ministry of Education of China, Nanchang 330063, China b School of Aeronautic and Mechanical Engineering, Nanchang Hangkong University, Nanchang 330063, China
摘 要：A novel cerium-tannic acid passivation treatment was performed on galvanized steel. The corrosion resistance of cerium-tannic passivated samples was tested by dropping test with 0.5 wt.% CuSO4 aqueous solution. The mass loss per unit area of passivated samples was measured after the corrosion in 0.5 mol/L NaCl + 0.005 mol/L H2SO4 at room temperature for 96 h. The electrochemical behaviors of cerium, tannic acid, and cerium-tannic acid passivated samples on galvanized steel in 0.5 mol/L NaCl solution were investigated by polarization curves and electrochemical impendence spectra. The corrosion equivalent circuit was established according to the impedance characteristics. The results show that cerium-tannic acid treated samples exhibit better corrosion resistance than the sole cerium or tannic acid treated samples under the same condition. The mechanism of synergistic effect for cerium-tannic acid passivation on galvanized steel was discussed.
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