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| Corrosion Electrochemical Sensor for Welded Structures in Aquatic Environment |
| ;Shizhe Song |
| 中国石油天然气管道工程有限公司 |
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Abstract In this paper, an electrochemical sensor to detect corrosion in aquatic environment was designed and set up.But contact and angular contact welding seam corrosio detection sensors were designed respectively. Based on local enclosure theory an enclosed electrolytic cell was built up by contacting the front section of insulated cavity with the surface of the component to be tested. Magnets were employed as contacting fix up on the structre surface. Current enclosing capability of the sensor was erified by the experiments. Employing the sensor developed, measurement were carried out at welding seam and different locations of the base metal on simulating welded specimens in NaCl solution of 3.5%. The results show that Rpof welding seam and base metal exhibit different trends against time, and both EIS spectrums diferentiate with each other evidently. It shows that the corrosion situations at different sections can be well distinguished by the sensor.
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Received: 12 July 2005
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