| 引用本文: | 文建国,周家茵,周世光.恒电量微扰法研究在含Cl-介质Ce3+对航空铝材的缓蚀作用.[J].国防科技大学学报,1997,19(6):118-122.[点击复制] |
| Wen Jianguo,Zhou Jiayin,Zhou shiguang.Studies on the Inhibiting Action of Ce3+ to Aviation Aluminium Alloy in Aqueous Chloride Solution by Coulostatic Pertubation Method[J].Journal of National University of Defense Technology,1997,19(6):118-122[点击复制] |
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| 恒电量微扰法研究在含Cl-介质Ce3+对航空铝材的缓蚀作用 |
| 文建国1, 周家茵2, 周世光2 |
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(1.东莞理工学院 东莞 511700;2.国防科技大学 材料工程与应用化学系 湖南 长沙 410073)
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| 摘要: |
| 本文用恒电量微扰法研究了Ce3+对铝合金在 O.lmol?L-1NaCl介质中的缓蚀机理及抗孔蚀性。结果表明:铝合金孔蚀诱导过程及其表面形成铈转化膜过程具有相同的电化学模式，电化学腐蚀速度控制步骤取决于钝化膜(转化膜)/溶液界面过程。Ce3+对铝合金孔蚀的诱导期和发展期均有抑制作用，形成铈转化膜后，铝基表面阻抗大大提高，耐孔蚀性增强. |
| 关键词: 恒电量微扰法，孔蚀，转化膜，铈离子 |
| DOI： |
| 投稿日期：1997-06-10 |
| 基金项目: |
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| Studies on the Inhibiting Action of Ce3+ to Aviation Aluminium Alloy in Aqueous Chloride Solution by Coulostatic Pertubation Method |
| Wen Jianguo1, Zhou Jiayin2, Zhou shiguang2 |
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(1.Dongguan Institute of Technology，Dongguan，511700;2.Department of Material Engineering and Applied Chemistry，NUDT，Changsha，410073)
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| Abstract: |
| In this paper the inhibiting function and its mechanism of the Ce3+ion to the pitting corrosion on LY12CZ aluminium alloy in O.1mol? L-1 NaCl solution are studied by using coulostatic pertubation method. The results of research show that the process of the pitting induction and the formation of cerium conversion film on aluminium alloy surface have similar electrochemical model. The rate controlling step of the electrochemical corrosionis thei nterface process of passivation layer(or conversion film)and solution. The Ce3+ can inhibit the pitting induction and developing process of the alluminium alloy. After the cerium conversion film is formed，the electrical impedance on the surface of aluminium alloy would increase and the anticorrosion will enhance. |
| Keywords: coulostatic pertubation method,pitting corrosion,conversion film,cerous cation |
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