铈盐封孔对6061铝合金阳极氧化膜耐蚀性的影响
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摘要
为提高6061铝合金阳极氧化膜的耐蚀性,利用铈盐溶液对其进行封孔处理。用电化学阻抗谱(EIS)和浸泡试验研究了不同工艺铈盐封孔后的氧化膜在质量分数3.5%NaCl溶液中的耐蚀性。同时,通过剥蚀试验对比研究了铈盐封孔与铝溶胶封孔和沸水封孔的效果。结果表明:氧化膜在30℃下铈盐封孔150min可获得较好的耐蚀性;铈盐封孔氧化膜的耐蚀性略低于沸水封孔氧化膜的,但优于溶胶封孔氧化膜的。
In order to improve the corrosion resistance of 6061 aluminum alloy,the anodic films were sealed with rare earth cerium salt solution.Electrochemical impedance spectroscopy(EIS)and immersing tests were used to study the corrosion behavior of the anodic films sealed in cerium salt solution with different parameters in 3.5mass%NaCl solution.And the sealing effect of cerium salt was compared with that of sealing in aluminum sol and boiling water.The results show that the film sealing in cerium salt at 30 ℃ for 150 min presented relatively good corrosion resistance,although it was slightly inferior in corrosion resistance to the film sealed by boiling water,but it provided better corrosion resistance than that by the sol-gel method.
In order to improve the corrosion resistance of 6061 aluminum alloy,the anodic films were sealed with rare earth cerium salt solution.Electrochemical impedance spectroscopy(EIS)and immersing tests were used to study the corrosion behavior of the anodic films sealed in cerium salt solution with different parameters in 3.5mass%NaCl solution.And the sealing effect of cerium salt was compared with that of sealing in aluminum sol and boiling water.The results show that the film sealing in cerium salt at 30 ℃ for 150 min presented relatively good corrosion resistance,although it was slightly inferior in corrosion resistance to the film sealed by boiling water,but it provided better corrosion resistance than that by the sol-gel method.
引文
[1]张圣麟.铝合金表面处理技术[M].北京:化学工业出版社,2009:23-25.
[2]段立清.铝合金阳极氧化膜的稀土封孔技术的研究[D].北京:北京化工大学,2010.
[3]MANSFELD F,CHEN C,BRESLIN C B,et al.Sealing of anodized aluminum alloys with rare earth metal salt solutions[J].J Electrochem Soc,1998,145(8):2792-2798.
[4]于兴文,严川伟,曹楚南.铝合金阳极氧化稀土封孔工艺及性能的研究[J].电镀与涂饰,2001,20(5):1-4.
[5]赵景茂,陈胜利,赵旭辉,等.铈盐在电场作用下对LY12铝合金阳极氧化膜的封孔作用[J].中国表面工程,2008,21(1):28-32.
[6]张建新,刘景柱.6063铝型材表面斑点腐蚀的成因及机理探讨[J].铝加工,2003,153(6):35-37.
[7]陈胜利.铝合金阳极氧化膜外加电压封孔工艺及耐蚀性研究[D].北京:北京化工大学,2008.
[8]陈朝轶,张鹏,刘静,等.6063铝合金阳极氧化膜腐蚀行为研究[J].热加工工艺,2013,16(42):38-40.
[2]段立清.铝合金阳极氧化膜的稀土封孔技术的研究[D].北京:北京化工大学,2010.
[3]MANSFELD F,CHEN C,BRESLIN C B,et al.Sealing of anodized aluminum alloys with rare earth metal salt solutions[J].J Electrochem Soc,1998,145(8):2792-2798.
[4]于兴文,严川伟,曹楚南.铝合金阳极氧化稀土封孔工艺及性能的研究[J].电镀与涂饰,2001,20(5):1-4.
[5]赵景茂,陈胜利,赵旭辉,等.铈盐在电场作用下对LY12铝合金阳极氧化膜的封孔作用[J].中国表面工程,2008,21(1):28-32.
[6]张建新,刘景柱.6063铝型材表面斑点腐蚀的成因及机理探讨[J].铝加工,2003,153(6):35-37.
[7]陈胜利.铝合金阳极氧化膜外加电压封孔工艺及耐蚀性研究[D].北京:北京化工大学,2008.
[8]陈朝轶,张鹏,刘静,等.6063铝合金阳极氧化膜腐蚀行为研究[J].热加工工艺,2013,16(42):38-40.