|
|
|
| ON THE DISTRIBUTION OF CHROMIUM IN THE CHROMIUMDEPLETED ZONE OF A SENSITIZED 18-8 STAINLESS STEELS |
| HUA PAO-TING;SHEN HSING-SU;CHOW TEH-JUI;LI KUI-CHIH Institute of Applied Chemistry; Academia Sinica |
|
Cite this article:
HUA PAO-TING;SHEN HSING-SU;CHOW TEH-JUI;LI KUI-CHIH Institute of Applied Chemistry; Academia Sinica. ON THE DISTRIBUTION OF CHROMIUM IN THE CHROMIUMDEPLETED ZONE OF A SENSITIZED 18-8 STAINLESS STEELS. Acta Metall Sin, 1965, 8(1): 98-102.
|
|
|
Abstract The distribution of chromium in the chromium-depleted zone of a sensitized (650℃,2 hrs.) 18-8 stainless steel was studied by our coulometric method. A sheet of stainlesssteel was held at a potential at which the chromium-depleted zone is active whereas theregions with higher chromium contents remain passive. Since the different parts of thedepleted zone contain different amounts of chromium and thus have different passivatingproperties, they can be "extracted" fractionally at different potentials and allow theirwidths and compositions to be determined separately. Using this method, it is shown that the chromium-depleted zone consists of layersof continuously varying chromium contents and passivating properties. The total widthof the depleted zone is about 2000A, but that containing less than 8.7％ Cr is only128A (on each side of Cr_(23)C_6) and that containing less than 16.1％ Cr is only 384A,etc. Thus, the distribution diagram of chromium in the depleted zone is for the firsttime quantitatively obtained (Fig. 2).
|
|
Received: 18 January 1965
|
[1] 华保定、沈行素、戴钟道等:科学通报,1963,(12) ,56．
[2] Hopkinson, B. E., Carroll, K. G.: Nature, 1959, 184, 1479．
[3] Philibert, J., Voeltzel, J., Platean. J.: Compt. Rend., 1961, 252, 2705．
[4] Edeleanu, C.: J. Iron Steel Inst., (London), 1957, 185, 482．
[5] Cihal, V., Prazak, M.: J. Iron Steel Inst. (London), 1959, 193, 360．
[6] 华保定、沈行素、邹中坚:科学通报,1964,(1) ,81．
[7] 华保定、沈行素、周德瑞:敏化温度对于贫铬层宽度的影响,未发表.
[8] #12
[9] Панченко,Е.В.等著,孙一唐译:金相实验室,(冶金工业出版社,1960年),459-460页.
[10] Philibert, J., Crussard, C., Wache, X. et al.: Compt. Rend., 1960, 251, 1289．
[11] #12
[12] Hatwell, H.: 3~e Colloque de Metallurgie sur la Corrosion, (Centre d'Etudes Nucleaires de Seclay, 1960) , p. 142．; |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
