地下管線緊密極化電位檢測

The Close-interval Polarization Potential Survey on Underground Pipeline

邱德俊(Der-Jiunn Chiou) ； 莊貴欽(Kuei-Chin Chuang) ； 何永盛(Yung-Sheng Ho)

《石油季刊》 39卷4期 (2003/12) Pp. 77-84

https://doi.org/10.30128/JP.200312.0008

摘要

地下管線運用陰極防蝕系統來保護管線，但地下管線在防蝕系統保護下效果究竟如何？如何「看」到管線是否產生腐蝕，依現有技術及考量快速性與經濟性而言，運用管線在防蝕電流保護下產生的地表電位來判斷管線是否在防蝕的狀態較為有效。
雖然地下管線檢測最準確之方法為智慧型PIG檢測，其準確性高，為目前最優良的檢測方法，但檢測成本高、國內無法自行執行且缺乏自行開發的技術或經濟效益，陰極防蝕之緊密極化電位檢測則可以彌補PIG無法作到的低成本、高時效性、技術自主的優點，若能加強檢測技術精度的提昇則有準確的檢測結果，除了掌握管線外部腐蝕的狀態，亦可找出較大範圍的腐蝕點及早修復。

關鍵字

陰極防蝕 ； 緊密電位 ； 極化電位

並列摘要

Cathodic protection is an excellent skill to help underground pipeline against corrosion. How do we evaluate the result of pipeline under cathodic protection is difficult. Under the consideration of technical possibility and economics, it may be a good method that use the close interval potential survey (CIPS).
It is more precise for checking anti-corrosion status of pipeline to use intelligent PIG. The using intelligent PIG to audit underground pipeline is very expensive, and it must be operation by specific foreign company because the key technology still own by two or three companies. The potential measurement is been developed many years in Taiwan. Many technical departments have the experience on close interval potential survey (CIPS).Combination the on/off measurement and CIPS can provide superior results on efficiency of cathodic protection and finding the coating defects..

並列關鍵字

Cathodic protecion ； Close interval potential survey ； Polarization potential