鋼筋混凝土構造物之陰極防蝕方法分為外加電流及犧牲陽極兩種，西濱快速公路WH33-3標係公路總局首次在濱海公路新建梁位於潮汐變化之感潮河段，採用外加電流之陰極防蝕工法施工。本文最主要係依設計施工過程和應注意事項加以探討，並將施工中遭遇困難情形提出討論，以為後續實施此工法借鏡，另本工程尚在施工中，嗣後完工之維護管理，亦為應關切之課題，如此才能確得陰極防蝕工法之成效。

Cathodic protection applied to RC structure is divided into Impressed Current Cathodic Protection (ICCP) and Sacrificial Anode Cathodic Protection (SACP). Contract WH33-3 of the Directorate General of Highways is the first bridge using Cathodic Protection above the tide changing waters. In this paper, the construction processes and what we need to pay attention to are been discussed. In addition, we point out the difficulties we met under construction in order to give some references for the continuing construction. By the way, this constructions is still in process, therefore, the protection and management are matters after finishing the work. By doing so, the result of this method can be got thoroughly.