氯化铈对铝合金铬酸盐转化膜防护性能的影响
Effect of Cerium Chloride on Corrosion Resistance of Chromate Conversion Coatings on Aluminum Alloy 6061
摘 要
采用电化学方法研究了6061铝合金在以CeCl3(0~60 mg/L)为添加剂的铬酸盐处理液中所得转化膜的防护性能。极化曲线测试结果表明, 加入适量的CeCl3(20~40 mg/L), 使电极的腐蚀电位Ecorr和点蚀电位Epit提高很多; 电化学阻抗(EIS)测试结果表明, 加入CeCl3后, 膜层的阻抗大幅度增加。研究表明, 加入适量的CeCl3可以有效改善膜层的防护性能, 而过量的CeCl3(60 mg/L)却使其性能变差。
铬酸盐转化膜
稀土氯化铈
防护性能
aluminum alloy
chromate conversion coating
rare earth cerium chloride
corrosion resistance
Abstract
The corrosion resistance of the chromate conversion coatings (CCCs) formed on AA6061 in chromate solutions with cerium chloride (0~60 mg/L) as additive was investigated by electrochemical measurement technology. The results of potentiodynamic polarization curves showed that the values of the pitting corrosion potential (Epit) and corrosion potential (Ecorr) of the CCCs raised greatly by adding a small amount of CeCl3 (20~40 mg/L). The electrochemical impedance spectroscopy (EIS) showed that the values of normalized Rp also greatly increased. The two tests indicate that an appropriate amount of CeCl3(20~40 mg/L) can improve effectively the corrosion resistance of the CCCs, whereas an excessive CeCl3 (e.g 60 mg/L) may deteriorate the property of the CCCs.
中图分类号 TG178
所属栏目 试验研究
基金项目
收稿日期 2010/5/28
修改稿日期 2010/7/1
网络出版日期
作者单位点击查看
备注张圣麟, 教授, 博士,
引用该论文: ZHANG Sheng-lin,LI Wei-wei,ZHANG Xiao-lin,MA Qiang,YAO Yuan,WANG Yuan-yuan. Effect of Cerium Chloride on Corrosion Resistance of Chromate Conversion Coatings on Aluminum Alloy 6061[J]. Corrosion & Protection, 2011, 32(4): 290
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参考文献
【1】Kendig M, Jeanjaquet S, Addison R, et al. Role of hexavalent chromium in the inhibition of corrosion of aluminum alloys[J]. Surface Coatings Technol, 2001, 140(1):58-66.
【2】Zhao J, Xia L, Sehgal A, et al. Effect of chromate and chromate conversion coatings on corrosion of aluminum alloy 2024-T3[J]. Surface Coatings Technol, 2001, 140(1):51-57.
【3】李鑫庆, 陈迪勤, 余静琴. 化学转化膜技术及应用[M]. 北京:机械工业出版社, 2004.
【4】Campestrini P, Van Westing E P M, De Wit J H W. Influence of surface preparation on performance of chromate conversion coatings on Alclad 2024 aluminium alloy Part I:Nucleation and growth[J]. Electrochimica Acta, 2001, 46(16):2553-2571.
【5】余会成, 陈白珍, 石西昌, 等. 6063铝合金三价铬化学转化膜的制备与电化学性能[J]. 物理化学学报, 2008, 24(8):1465-1470.
【6】王成, 江峰. 用电化学方法研究LY12铝合金铬磷化[J]. 腐蚀与防护, 2002, 23(1):15-17.
【7】Kulinich S A, Akhtar A S, Susac D, et al. On the growth of conversion chromate coatings on 2024-Al alloy[J]. Applied Surface Science, 2007, 253(6):3144-3153.
【8】Yu H C, Chen B Z, Shi X C, et al. Investigation of the trivalent-chrome coating on 6063 aluminum alloy[J]. Materials Letters, 2008, 62(17-18):2828-2831.
【9】朱利萍, 鲁闽, 熊仁章. 铝合金稀土铈盐转化膜耐蚀性能研究[J]. 兵器材料科学与工程, 2007, 30(5):60-63.
【10】Lee W J, Pyun S I. Effects of sulphate ion additives on the pitting corrosion of pure aluminium in 0.01 M NaCl solution[J]. Electrochim Acta, 2000, 45(12):1901-1910.
【11】Kiryl A Y, Mikhail L Z, Sviatlana V L, et al. Mechanism of corrosion inhibition of AA2024 by rare-earth compounds[J]. J.Phys Chem B, 2006, 110(11):5515-5528.
【12】Keun Woo Cho, V Shankar Rao, HyukSang Kwon. Microstructure and electrochemical characterization of trivalent chromium based conversin coating on zinc[J]. Electrochim Acta, 2007, 52(13):4449-4456.
【13】Yu, H C, Chen B Z, Wu H Y, et al. Improved electrochemical performance of trivalent-chrome coating on 6063 alloy via urea and thiourea addition[J]. Electrochim Acta, 2008, 54(2):720-726.
【14】白丽群, 舒康颖, 郭敏, 等. 预处理对镁合金镧转化膜及耐腐蚀性能的影响[J]. 中国稀土学报, 2008, 26(5):592-597.
【15】邝钜炽. 稀土硝酸盐对磷化过程的促进作用[J]. 稀土, 2006, 27(1):26-29.
【16】安茂忠, 屠振密, 杨哲龙, 等. 稀土化合物在磷化中的影响和作用[J]. 材料保护, 2000, 33(11):20-21, 28.
【2】Zhao J, Xia L, Sehgal A, et al. Effect of chromate and chromate conversion coatings on corrosion of aluminum alloy 2024-T3[J]. Surface Coatings Technol, 2001, 140(1):51-57.
【3】李鑫庆, 陈迪勤, 余静琴. 化学转化膜技术及应用[M]. 北京:机械工业出版社, 2004.
【4】Campestrini P, Van Westing E P M, De Wit J H W. Influence of surface preparation on performance of chromate conversion coatings on Alclad 2024 aluminium alloy Part I:Nucleation and growth[J]. Electrochimica Acta, 2001, 46(16):2553-2571.
【5】余会成, 陈白珍, 石西昌, 等. 6063铝合金三价铬化学转化膜的制备与电化学性能[J]. 物理化学学报, 2008, 24(8):1465-1470.
【6】王成, 江峰. 用电化学方法研究LY12铝合金铬磷化[J]. 腐蚀与防护, 2002, 23(1):15-17.
【7】Kulinich S A, Akhtar A S, Susac D, et al. On the growth of conversion chromate coatings on 2024-Al alloy[J]. Applied Surface Science, 2007, 253(6):3144-3153.
【8】Yu H C, Chen B Z, Shi X C, et al. Investigation of the trivalent-chrome coating on 6063 aluminum alloy[J]. Materials Letters, 2008, 62(17-18):2828-2831.
【9】朱利萍, 鲁闽, 熊仁章. 铝合金稀土铈盐转化膜耐蚀性能研究[J]. 兵器材料科学与工程, 2007, 30(5):60-63.
【10】Lee W J, Pyun S I. Effects of sulphate ion additives on the pitting corrosion of pure aluminium in 0.01 M NaCl solution[J]. Electrochim Acta, 2000, 45(12):1901-1910.
【11】Kiryl A Y, Mikhail L Z, Sviatlana V L, et al. Mechanism of corrosion inhibition of AA2024 by rare-earth compounds[J]. J.Phys Chem B, 2006, 110(11):5515-5528.
【12】Keun Woo Cho, V Shankar Rao, HyukSang Kwon. Microstructure and electrochemical characterization of trivalent chromium based conversin coating on zinc[J]. Electrochim Acta, 2007, 52(13):4449-4456.
【13】Yu, H C, Chen B Z, Wu H Y, et al. Improved electrochemical performance of trivalent-chrome coating on 6063 alloy via urea and thiourea addition[J]. Electrochim Acta, 2008, 54(2):720-726.
【14】白丽群, 舒康颖, 郭敏, 等. 预处理对镁合金镧转化膜及耐腐蚀性能的影响[J]. 中国稀土学报, 2008, 26(5):592-597.
【15】邝钜炽. 稀土硝酸盐对磷化过程的促进作用[J]. 稀土, 2006, 27(1):26-29.
【16】安茂忠, 屠振密, 杨哲龙, 等. 稀土化合物在磷化中的影响和作用[J]. 材料保护, 2000, 33(11):20-21, 28.
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