蘭嶼核廢料貯存壞溝中所用之核廢料昨存鋼桶，經研議採用熱浸蠶錚技術以增進其耐蝕力。於決定採行熱浸鍍辭之前曾進行各項研究，以確定材料耐蝕力以及熱浸鍍技術之可行性。本研究延續實驗室之模擬研究，進行蘭嶼壞溝內現場暴露試驗，將歷經七年試驗之試片，以化學分析電子光譜(ElectronSpectroscopy for Chemical Analysis， ESCA或稱XPS)之結果進行腐蝕因子分析，並 依據金相分析結果以瞭解熱浸鍍詐、熱浸鍍5%鋁錚、以及熱浸鑑55%鋁錚三種鍍層之腐蝕形態以及腐蝕速率。根據分析結果顯示:腐蝕速率以熱浸鍍55%鋁錚者最低，但熱浸鍍55%鋁錚有嚴重之孔蝕現象。熱浸鍍錚與熱浸鍍5%鋁錚則未見于L蝕，其腐蝕速率分別為2.9微米/年以及1.4微米/年。

A policy has been decided to apply hot dip galvanization for enhancing the corrosion resistance of the radiowaste canisters to be stored in Lan- Yu radiowaste storage trench. A serious of investigations have been conducted for the feasibility ofthe galvanization technology prior to the decision making. The present study stepped follow the laboratory simulation research on performing the field test of the corrosion resistance of the hot dip Zn， Al-Zn canister steel in the Lan-Yu storage trench. The results ofa seven year exposure test are discussed in this present work. ESCA (ElectronSpectroscopy for Chemical Analysis) was applied for investigating the corrosion factors. The corrosion behaviors and corrosion rates of the Zn， 5%Al-Zn， and 55%Al-Zn coatings were investigated with the aid of metallography. The experimental results indicate that 55'OA1-Zn exhibits the lowest，corrosion rate， yet pitting occured for this coating while not for the Zn and 5%Al-Zn coatings. The corrosion rates were estimated to be 2.9 and 1.4 μm/year for the Zn and 5%AI-Zn coatings， respectively.