| ZHANG Hao-yue,WANG Jin-mei.Cause of Metal Crevice Corrosion and Experiment Verification[J],46(2):204-207 |
| Cause of Metal Crevice Corrosion and Experiment Verification |
| Received:November 09, 2016 Revised:February 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.02.034 |
| KeyWord:metal crevice corrosion FeCl3 |
| Author | Institution |
| ZHANG Hao-yue |
Chongqing Yucai Chenggong School, Chongqing , China |
| WANG Jin-mei |
Southwest Technology and Engineering Research Institute, Chongqing , China |
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| Abstract: |
| As a very common and concealed local corrosion in products and engineering structures, crevice corrosion will not only reduce service life and component strength, but also result in a security issue. Three essential conditions, presence of metal or alloy, existence of crevices and residue of corrosion medium in products and engineering structures, were necessary for crevice corrosion. The characteristics and three stages of crevice corro-sion were summarized. The influence factors of crevice corrosion, including metal properties, environmental fac-tors (dissolved oxygen, chlorine ion concentration, temperature, pH value and the velocity of the solution) and crevice geometry were analyzed. The essential steps of examining crevice corrosion sensitivity of stainless steel and alloy in laboratory with ferric chloride solution were introduced. The basic idea of crevice corrosion resistance was put forward in engineering practices. |
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