地下管線陰極防蝕工程應用與檢測

Application and Maintenance of Cathodic Protection for Underground Pipeline

邱德俊(Der-Jiunn Chiou) ； 許峰彰(Frank-F. Sheu)

《石油季刊》 42卷4期 (2006/12) Pp. 57-67

https://doi.org/10.30128/JP.200612.0005

摘要

陰極防蝕是地下管線對抗環境腐蝕及雜散電流攻擊最主要的方法，但是許多裝設了陰極防蝕的地下管線依然發生腐蝕洩漏。主要原因是許多人都忽略了陰極防蝕施工階段才是確保陰極防蝕成功的基礎。材料的選擇及施工程式的每一步驟都決定了是否會增加防蝕成本、管線是否仍在默默腐蝕的關鍵。在管線存在的環境無法改變的條件下，如果無法在安裝階段掌握工程品質，即使有完美的設計，管線腐蝕必然發生。而有計劃的檢測是維持地下管線安全營運，增加操作壽命的信心。因此本文針對陰極防蝕在各種材料設備的應用、特性及正確的安裝方法，提出在施工階段及檢測時應注意事項及最適當的工法。

關鍵字

陰極防蝕 ； 深井地床 ； 淺井地床

並列摘要

The most effective method in reducing with corrosion factor in soil for underground pipeline is applying cathodic protection. Due to improper installation, serious corrosion still happens in many underground pipelines equipped with cathodic protection. Selection of materials and the procedure of installation in cathodic protection will strongly affect the future maintenance cost and the corrosive behavior. The environment can not be changed when pipeline is being laid. The pipeline will be corroded even with perfect design, if not much attention to quality control during installation stage is being paid. Planning on periodic cathodic protection for underground pipeline will increase the confidence in pipeline operation. This article discusses the characteristic of various materials and the correct procedures in installation. Furthermore, application of effective close interval potential survey of underground pipeline will be discussed in detail.

並列關鍵字

Cathodic Protection ； Deep Well Ground Bed ； Shallow Well Ground Bed