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| Exposure Position Influences on the Corrosion Resistance of the T2 Copper in Tropic Marine Atmosphere |
| Received:January 22, 2017 Revised:June 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.06.022 |
| KeyWord:pure copper tropic marine atmosphere corrosion salt spray deposition |
| Author | Institution |
| FU Ce-hu |
Sanya Branch of Luoyang Ship Material Research Institute, Sanya , China |
| REN Hai-tao |
Sanya Branch of Luoyang Ship Material Research Institute, Sanya , China |
| YAO Hua |
Sanya Branch of Luoyang Ship Material Research Institute, Sanya , China |
| LI Geng-rong |
Sanya Branch of Luoyang Ship Material Research Institute, Sanya , China |
| LI Wen-jun |
Sanya Branch of Luoyang Ship Material Research Institute, Sanya , China |
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| Abstract: |
| Objective To study influences on the corrosiveness of pure copper in the tropical marine atmosphere circumstances of different exposure positions. Methods The T2 copper in Sanya tropical beach of different offshore distances was tested for 24 months of marine atmospheric exposure. Combined with the changing conditions of deposition and humidity of Chloride Ion accordingly in the air, morphology, ingredient and phase of the corrosion products were analyzed with SEM, X-Ray EDS, and XRD. Results T2 copper in the tropical marine atmosphere corroded uniformly. Its average corrosion speed decreased with the increase of the distance to the ocean surfaces and the time of exposing. The corrosion products were in a bilayer structure, the outer sphere of which was green Cu2(OH)3Cl; the inlayer was dense Cu2O.With the increase of the distance to the ocean surfaces and the time of exposing, the heavier the concentration of the Chloride Ion in the electrolytes on the surface of the samples and the more the Cu2(OH)3Cl in corrosion products of TS copper. Whereas, Cu2O was the most in the corrosion products. Conclusion There were significant differences between corrosion rate and salt spray deposition with offshore distance changes, salt spray deposition first increased and then decreased, with the maximum value in the 80 meters offshore; due to influences of the relative humidity of the atmosphere, the corrosion rate of T2 copper has the maximum value in the offshore 0 meters, a maximum at 80 meters offshore. |
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