電力、石油、石化、化學等各種工業的生產運輸設備常因腐蝕而產生停工修護，設備更換，流程無法改善，生產力降低，甚至保險損失等問題。傳統的腐蝕監偵測技術因無法提供及時的腐蝕情況，使得操作人員無法利用監偵測技術採取行動解決腐蝕問題，以致傳統的腐蝕偵測技術只能告訴操作人員在某一段時期材料腐蝕了多少，這一個訊息似乎對改善以上所提的問題沒有多大幫助。現代的腐蝕診斷技術利用電化學監偵測技術，能立即提供腐蝕速度、形態的功能，使得現場操作人員能夠結合腐蝕訊息和其他操作訊號（如溫度等），即時診斷設備及流程的腐蝕狀況，採取適當措施，以解決上述問題，大大提高了腐蝕偵測技術的應用價值。本文主要在闡述腐蝕診斷和腐蝕監偵測的關係和差異以及如何利用電化學腐蝕診斷技術解決上述的問題。

Corrosion can cause unexpected shutdown, equipment repair, low production efficiency and insurance problem. Conventional corrosion monitoring technology provide corrosion information of material only afetr a period of time. Corrosion and maintenace personal benefits very little from using such a technology. On recent years there has been a quite revolution in corrosion monitoring technology. Advanced electrochemical technology hased on a. c impedance and electrochemical noise provides real time corrosion rate and type, which can combine with operational parametes, to give operators a usual tool to control corrosion and evaluate corrosion production. The purpose of this paper is to provide a review of this advanced technology and its typical applications.