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| Effects of Temperature and Chloride Ion Concentration on Corrosion Rate of 30CrMnSiNiA |
| Received:May 25, 2017 Revised:September 15, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2017.09.019 |
| KeyWord:weight loss method corrosion rate chlorine ion concentration corrosion mechanism |
| Author | Institution |
| YOU Ming-rui |
Naval Aeronautical Engineering Institute Qingdao Branch, Qingdao , China |
| JIN Ping |
Naval Aeronautical Engineering Institute Qingdao Branch, Qingdao , China |
| TAN Xiao-ming |
Naval Aeronautical Engineering Institute Qingdao Branch, Qingdao , China |
| WANG De |
Naval Aeronautical Engineering Institute Qingdao Branch, Qingdao , China |
| SU Yu-ling |
Navy Unit 91663, Qingdao , China |
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| Abstract: |
| Objective To study effects of temperature and chloride ion concentration on the corrosion rate of metal. Methods The corrosion rate of 30CrMnSiNiA steel structure at different chloride ion concentration and temperature was researched and compared with the weight loss method. Results The corrosion rate of steel 30CrMnSiNiA experienced an increase--decrease-- stabilizing process, which mean that the corrosion mechanism was not changed. At low temperature and low chlorine, elevated temperature and chlorine concentration would increase the corrosion rate; at high temperature and chlorine ion concentration, continuous raising the temperature and chlorine ion concentration would reduce the content of dissolved oxygen in solution, and thus decrease the corrosion rate. The limit extension rate of dissolved oxygen would become the key factor limiting the corrosion rate. Conclusion Rules for corrosion behaviors of the metal at different temperature and chlorine are the same. The temperature and chloride ion concentration promote the corrosion rate of metal within a certain scope. If the inversion point is exceeded, improving the temperature and chloride ion concentration can reduce the corrosion rate. |
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