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| Corrosion Behavior of Copper and Its Alloys in Freshwater-Seawater Alternate Circumstance |
| Received:July 18, 2016 Revised:February 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.02.005 |
| KeyWord:copper copper alloy corrosion flow velocity seawater-freshwater alternate circumstance |
| Author | Institution |
| YANG Bo-jun |
Advanced Material Academy of Luoyang Ship Material Research Institute, Xiamen , China |
| CHEN Xiang-feng |
1.Advanced Material Academy of Luoyang Ship Material Research Institute, Xiamen , China; 2.State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| YAO Jing-hua |
1.Advanced Material Academy of Luoyang Ship Material Research Institute, Xiamen , China; 2.State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| REN Run-tao |
1.Advanced Material Academy of Luoyang Ship Material Research Institute, Xiamen , China; 2.State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
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| Abstract: |
| Objective To study corrosion behaviors of copper and its alloys in seawater-freshwater alternate circumstance. Methods Three kinds of typical metals, including Tup pure copper, B10 and B30 copper alloys, were exposed in seawater, freshwater and seawater/freshwater alternate circumstance for 2 years to compare the data of corrosion morphology and corrosion rate. The corrosion rules of 3 kinds of metals in different water circumstances were summarized, the corrosion mechanism were discussed, and the long-term corrosion behaviors were also predicted. Results Influences of seawater-freshwater alternate circumstance on Tup pure copper was 1.66 times of that of seawater. Influences of seawater-freshwater alternate circumstance on B30 copper alloy was 2.07 times of that of seawater. Influences of seawater-freshwater alternate circumstance on B10 copper alloy was 2.17 times of that of seawater. Conclusion Sequence of copper and its alloys corrosion resistance is fresh water, seawater and seawater-freshwater alternate circumstance. The corrosion of copper and its alloys are more serious under higher flow velocity of water in natural environment. |
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