| YANG Jing-wei,ZHAO Yong-gang,SUN Jie,HU Sheng-nan,WANG Hui,LI Zhen-yu.Defect Analysis of the Aluminum Alloy Substrate after Chromic Acid Anodizing[J],43(2):72-74,94 |
| Defect Analysis of the Aluminum Alloy Substrate after Chromic Acid Anodizing |
| Received:November 30, 2013 Revised:February 26, 2014 |
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| DOI： |
| KeyWord:aluminum alloy chromic acid anodizing segregation |
| Author | Institution |
| YANG Jing-wei |
AVIC Shenyang Liming AERO-Engine Group Co. Ltd, Shenyang , China |
| ZHAO Yong-gang |
AVIC Shenyang Liming AERO-Engine Group Co. Ltd, Shenyang , China |
| SUN Jie |
School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang , China |
| HU Sheng-nan |
AVIC Shenyang Liming AERO-Engine Group Co. Ltd, Shenyang , China |
| WANG Hui |
AVIC Shenyang Liming AERO-Engine Group Co. Ltd, Shenyang , China |
| LI Zhen-yu |
AVIC Shenyang Liming AERO-Engine Group Co. Ltd, Shenyang , China |
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| Abstract: |
| Objective To analyze the surface defects of the aluminum alloy substrate after chromic acid anodizing and its cause.Methods The morphology, microstructure and corrosion products of the defects were analyzed by scanning electron microscopy ( SEM) , metallurgical microscopy and energy dispersive spectrometer ( EDS) , respectively. Results The defects on the substrate of the aluminum alloy could be caused by the intergranular corrosion when treated by chromic anodizing. Conclusion The elements of Cu, Ni, Mg and Fe could be enriched to form segregation in the process of heat treatment to cause the corrosion of substrate in the chromic acid solution. |
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