【摘要】 本文在3％NaCl溶液中采用线性极化及交流阻抗技术测定了镀锌层和钝化后的锌镀层的极化电阻，实验表明：低铬钝化后腐蚀电阻明显增大，是纯锌的2～6倍，同时利用Stem-Geary方程，根据极化电阻Rp和Tafel斜率计算腐蚀电流，同时探讨了钝化后的镀锌层在静止电位下的交流抗行为。更多还原

【Abstract】 Corrsion resistance of zinc deposit and chromated zinc electrodeposit was evaluated in 3% NaCl solution by linear polarization and AC impedance method. The low chromating film had ed corrosion resistance, being 2～6 times higher than that of pure zinc plate. Based on the data of Rp as well as Tafel slopes, the corrosion current were calculated according to stem-Geary equation. The particularity of the impedance behaviour of chromated zinc was discussed.更多还原