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| Galvanic Corrosion Model with Insulation Spacer |
| Received:November 08, 2016 Revised:February 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.02.012 |
| KeyWord:galvanic corrosion insulation spacer electrochemistry model |
| Author | Institution |
| ZHOU Zi-long |
Naval University of Engineering, Wuhan , China |
| ZHANG Lei |
Naval University of Engineering, Wuhan , China |
| HU Hui-e |
Naval University of Engineering, Wuhan , China |
| LIU Ming-guang |
Service College of Naval University of Engineering, Tianjin , China |
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| Abstract: |
| Objective To design a galvanic corrosion model with insulation spacer and test the isolation effect. Methods Three kinds of materials, such as pipeline sealing gasket, non-woven fabrics and sealing daub were selected as spacer to test galvanic current, galvanic voltage and electrochemical alternating-current impedance. Results The galvanic current of sealing daub was the smallest. Its electrochemical impedance was always high; non-woven fabric was easy to be wetted, so it had the largest electric current; but it had the highest dry insulation resistance also. Conclusion The galvanic corrosion model designed is feasible. The result of different electrochemical methods are corresponding, improving the credible degree of the result. The effect of material isolation is related to the wetting degree of medium, and has little relationship with its dry insulation resistance. |
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