| 316L不锈钢楔形缝隙内溶液化学 |
| |
| 引用本文： | 张琳,曹备,吴荫顺,崔强,陈卓,方智.316L不锈钢楔形缝隙内溶液化学[J].北京科技大学学报,1996(Z2). |
| |
| 作者姓名： | 张琳 曹备 吴荫顺 崔强 陈卓 方智 |
| |
| 作者单位： | 北京科技大学表面科学与腐蚀工程系 |
| |
| 摘 要： | 用微电极研究了３１６Ｌ不锈钢楔形缝隙在３．５％ＮａＣｌ溶液（室温）中的溶液化学变化规律。结果表明：在两种不同缝隙开口情况下，缝隙内各点的Ｃｌ－都发生了富集，ｐＨ也都降低；当缝隙开口为１．３６ｍｍ时，缝隙内Ｃｌ－浓度随时间和与缝口距离的增大而增大，ｐＨ值随之下降，最高Ｃｌ－浓度为１．６ｍｏｌ／ｌ，最低ｐＨ值为５．０１；当缝隙开口为０．２２ｍｍ，最高Ｃｌ－浓度为１．１ｍｏｌ／ｌ，最低ｐＨ值为３．１．缝隙内溶液酸化是由于金属离子的水解和Ｃｌ－的共同作用，缝内金属氯化物浓度甚至可以达到饱和态。
|
| 关 键 词： | 缝隙腐蚀，316L不锈钢，Cl~－，pH |
Solution Chemistry in Cuneiform Crevice of 316L Stainless Seel |
| |
| Zhang Lin,Cao Bei,Wu Yinshun,Cui Qiang,Chen Zhuo,Fang Zhi,.Solution Chemistry in Cuneiform Crevice of 316L Stainless Seel[J].Journal of University of Science and Technology Beijing,1996(Z2). |
| |
| Authors: | Zhang Lin Cao Bei Wu Yinshun Cui Qiang Chen Zhuo Fang Zhi |
| |
| Abstract: | The solution chemistry in cuneiform crevice of 316L stainless steel was studied in 3.5%NaCl at room temperature.The Cl-was concentrated and PH value decreased in the cuneiform crevice with two sizes of crevice opening. When the crevice opening is 1.36mm,the Cl-concentration increased and PH value decreased with time and the distrance from the opening. The highest Cl-concentration is 1.6mol/l and the lowest PH value is 5.01.When the opening is 0.22mm, the highest Cl- is 1.1 mol/l and the lowest PH value is 3.1.The very low PH value in the crevice was formed by the hydrolysis of dissolving metal ions and Cl-. The chloride can be very concentrated in the crevice. even be saturated. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
|
