| 孔蚀过程中微区电位变化的观测与模拟 | |
| 韩玉梅 | |
| Subtype | 硕士 |
| Thesis Advisor | 柯伟 |
| 1990 | |
| Degree Grantor | 中国科学院金属腐蚀与防护研究所 |
| Place of Conferral | 中国科学院金属腐蚀与防护研究所 |
| Abstract | 本文采用海洋平台用钢A537Cl做为实验材料对小孔在电化学作用下以及电化学、力学共同作用下的电位变化做了测试。同时也研究了孔的尺寸对蚀孔电位变化的影响。本文还对新的实验技术微区腐蚀电位分布测量仪给予介绍及应用。结果表明蚀坑在腐蚀过程中自射存在电位周期波动趋势。蚀坑的宽度、深度等形状尺寸对电位周期波动相存在影响，应力对电位大小有很大的作用，且小应力对直径小的蚀孔的影响更大。多蚀孔电位变化很复杂，它是许多因素相互影响的结果，如力学因素、化学因素，蚀孔尺寸，电解液的性质等。微区腐蚀电位分布测量仪是测定裂尖塑性区电位变化，确定最佳保护电位的一种简便、有效的工具。 |
| Other Abstract | The pit potential variations under electro-chemical action and joint action of electro-chemistry and mechanics factors were measured on A537CL steel specimens and the effects of pit size on potential variations were studied using a new experiment technique, micro-area corrosion potential measurement. It is shown that pit potential itself tends to periodical undulation during the tests, and that the pit shapes, such as width and depth of pits, have an influence on the periodical phases of the potential. The stress applied also have a great effect on the potential value and the effect of small stress on the pit whose diameter is smaller is significant. Improved micro-area corrosion potential distribution instrument is a simple and powerful tool for measuring the potential variation near the plastic zone of crack and determining the best range for protective potential. |
| Pages | 55 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/17435 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | 韩玉梅. 孔蚀过程中微区电位变化的观测与模拟[D]. 中国科学院金属腐蚀与防护研究所. 中国科学院金属腐蚀与防护研究所,1990. |
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