| ELECTROCHEMICAL FEATURES DURING PITTING CORROSION OF LY12 ALUMINUM ALLOY IN DIFFERENT NEUTRAL SOLUTIONS |
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| 引用本文： | F.H. Cao,Z. Zhang,Y.L. Cheng,J.F. Li,J.Q. Zhang and C.N.CaoDepartment of Chemistry,Yuquan Campus,Zhejiang University,Hangzhou 310027. ChinaState Key Laboratory for Corrosion and Protection of Metals,Institute of Metal Research,The Chinese Academy of Sciences,Shenyang 110016,China. ELECTROCHEMICAL FEATURES DURING PITTING CORROSION OF LY12 ALUMINUM ALLOY IN DIFFERENT NEUTRAL SOLUTIONS[J]. 金属学报(英文版), 2003, 16(4): 319-326 |
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| 作者姓名： | F.H. Cao Z. Zhang Y.L. Cheng J.F. Li J.Q. Zhang and C.N.CaoDepartment of Chemistry Yuquan Campus Zhejiang University Hangzhou 310027. ChinaState Key Laboratory for Corrosion and Protection of Metals Institute of Metal Research The Chinese Academy of Sciences Shenyang 110016 China |
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| 作者单位： | F.H. Cao，Z. Zhang，Y.L. Cheng，J.F. Li，J.Q. Zhang and C.N.CaoDepartment of Chemistry，Yuquan Campus，Zhejiang University，Hangzhou 310027. ChinaState Key Laboratory for Corrosion and Protection of Metals，Institute of Metal Research，The Chinese Academy of Sciences，Shenyang 110016，China |
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| 基金项目： | the National Key Basic Research Foundation of China，国家自然科学基金，the State Key Laboratory for Corrosion and Protection of Metals (China) |
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| 摘 要： | The electrochemical features of commercial airfrarne material, Al alloy LY12, in 0.349mol/L neutral sodium chloride (NaCl) and sodium sulfate (NazSO^) solutions were investigated by electrochemical impedance spectroscopy (EIS) and potentiody-namic polarization techniques. The microstructure of the as-tested samples was studied by scanning electron microscopy. The results show that the Nyquist plots of LY12 at different immersion time displayed different features, indicating that the Cl- ions elevate the corrosion rate and inhibit the repassivation of a metastable pit. It also shows that the corrosion product of LY12 formed in SO42- solution isn't easy to dissolve, and it will cover the surface of working electrode in the electrolyte. SEM images indicate that the corrosion apparent area and pit number of LY12 in NaCl solution are greater than that in Na2SO4 solution.
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| 收稿时间： | 2002-07-10 |
| 修稿时间： | 2002-10-10 |
ELECTROCHEMICAL FEATURES DURING PITTING CORROSION OF LY12 ALUMINUM ALLOY IN DIFFERENT NEUTRAL SOLUTIONS |
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| F.H.Cao,Z.Zhang,Y.L.Cheng,J.F.Li,J.Q.Zhang,C.N.Cao. ELECTROCHEMICAL FEATURES DURING PITTING CORROSION OF LY12 ALUMINUM ALLOY IN DIFFERENT NEUTRAL SOLUTIONS[J]. Acta Metallurgica Sinica(English Letters), 2003, 16(4): 319-326 |
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| Authors: | F.H.Cao Z.Zhang Y.L.Cheng J.F.Li J.Q.Zhang C.N.Cao |
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| Affiliation: | 1. Department of Chemistry, Yuquan Campus, Zhejiang University, Hangzhou 310027, China
2. Department of Chemistry, Yuquan Campus, Zhejiang University, Hangzhou 310027, China;State Key Laboratory for Corrosion and Protection of Metals, Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016, China |
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| Abstract: | The electrochemical features of commercial airfrarne material, Al alloy LY12, in 0.349mol/L neutral sodium chloride (NaCl) and sodium sulfate (NazSO^) solutions were investigated by electrochemical impedance spectroscopy (EIS) and potentiody-namic polarization techniques. The microstructure of the as-tested samples was studied by scanning electron microscopy. The results show that the Nyquist plots of LY12 at different immersion time displayed different features, indicating that the Cl- ions elevate the corrosion rate and inhibit the repassivation of a metastable pit. It also shows that the corrosion product of LY12 formed in SO42- solution isn't easy to dissolve, and it will cover the surface of working electrode in the electrolyte. SEM images indicate that the corrosion apparent area and pit number of LY12 in NaCl solution are greater than that in Na2SO4 solution. |
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| Keywords: | LY12 aluminum alloy pitting corrosion electrochemical impedance spectroscopy potentiodynamic polarization pit- morphology |
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