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| Galvanic Corrosion Behavior of X65/316L Coupled in Simulated Flowing Formation Water |
| Received:March 24, 2016 Revised:August 15, 2016 |
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| DOI：10.7643/ issn.1672-9242.2016.04.026 |
| KeyWord:double metal composite tube galvanic corrosion ZRA Tafel |
| Author | Institution |
| LUO Rui |
Shanghai Hailong Oil Tubular Goods Research Institute, Shanghai , China |
| YU Shi-jie |
1.Shanghai Hailong Oil Tubular Goods Research Institute, Shanghai , China;2.Southwest Petroleum University, Chengdu , China |
| YUAN Peng-bin |
Southwest Petroleum University, Chengdu , China |
| OU YANG Zhi-ying |
Shanghai Hailong Oil Tubular Goods Research Institute, Shanghai , China |
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| Abstract: |
| Objective To study the galvanic corrosion behavior of 316L and X65 coupled in the simulated flowing formation water. Methods The paper carried out experiments with X65 /316L coupled in the simulated flowing formation water saturated with CO2, measured the polarization curve and AC impedance spectrum of galvanic current, galvanic potentials, open circuit potential and samples under different temperatures and flow velocities through electrochemical workstation. Additionally, galvanic corrosion behavior of tube was analyzed by observing corrosion morphology with scanning electron microscope (SEM). Results The corrosion rates of coupled X65 were 0.883 mm/a and 1.169 mm/a respectively in the simulated flowing formation water at simulated velocities of 0 m/s and 0.2 m/s. Conclusion X65 anodic reaction polarization degree is small. The cathodic reaction process of 316L is a step to control the overall reaction rate. The anodic dissolution on X65 surface occurs accompanied by the cathode reaction. |
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