|
|
|
Abstract Surface sensitive techniques, such as SEM and ESCA, were used for comparing and analyzing the metallurgical structure, surface morphology and composition of Al-Zn-In-Si alloy before and after discharging. ESCA combined with Ar~+ ion sputtering technique was employed for profile analysis of the composition of the oxide film which was formed at the surface of aluminum anode. The measurement results show: (1)The metallurgical structure of Al-Zn-In-Si alloy: There are three kinds of segregative phase which exist in Al-Zn solid solution matrix, One is rich in In. The other two are Al-Fe-Si and Al-Fe-In-Si precipitates which are situated in interdendritic region. (2) The surface film of Al alloy anode formed in the air, is mainly composed of aluminum and zinc oxide. A thin layer of indium was found between the oxide film and the matrix. (3)When discharging, the surface of aluminum anode was activated and dissolved. The so-formed pits expanded rapidly and joined together. The In-riched precipitates bear no relation to the initiation of pits. After long term discharglng,the surface was covered with thick aluminum oxide, upon which there were some deposits of metal zinc and indium, which seem to be responsible for keeping continuous activation and dissolution of alumminum alloy anode.
|
|
Received: 25 April 1989
|
[1] 孙璧媃等,铝合金牺牲阳极,上海交通大学学报,2,(1979)
[2] Despic', A. R.; Drazic, D. M.; Purenovic', M. M., Cikovic', N., J. of Applied Electrochem., 6,527(1976)
[3] Mance, A.; Cerovic', Do, Mihajlovic', A., ibid., 14,459(1984)
[4] Al-Saffer, A. H.; Ashworth, V.; Grant, W. A. and Procter, P. M., Corrosion Science, 18,687(1978)
[5] Reboul, Maxc. Material performance, 19, 35(1980)
[6] Reboul, M. C.; Gimenz, ph.; Rameau, J. J., Corrosion-NACE, 40 366(1984)
[7] Wehner, G. K.. The Aspects of Sputtering in Surface Analysis from Elsevier, Amsterdam, Methods of Surface Analysis, Chapter 1, 5 (1975)
[8] 朱峰;吴益华;黄永昌,腐蚀与防护,5,8(1988)
[9] Mondolfo, L. F., Aluminum Alloys Structure and Properties, Butterworths, London, (1976) |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
