本研究之目的在評估鍋爐鹼洗除垢時，高溫鹼性清洗液是否會造成鍋爐管材的腐蝕，首先針對碳鋼爐管材料在商用鹼洗溶劑（Vertain675）搭配腐蝕抑制劑（A300）的清洗液中加溫至100?150℃、150?200℃之間，量測其電化學腐蝕特性以及鹼洗除垢之效果，以分析管材在高溫鹼洗過程中發生腐蝕之可能。在定時取樣鹼洗液分析時，若發現鹼洗液中金屬離子的濃度隨時間升高，經電化學腐蝕測試之訊號分析，及試片重量損失分析印證下，就可評估腐蝕的可能性。 為防止高溫腐蝕發生，本研究採用最具潛力的三種鹼洗劑如EDTA銨鹽、NTA銨鹽及ETA中選取較具清洗效果之溶劑，配合選自陽極型、陰極型及混合型三種抑制劑中之最佳抑制劑，來和商用鹼洗液比較其除垢效果及管材腐蝕能力，並探討腐蝕及防蝕機理，達成計畫預期之目標。 The purpose of this study is to evaluate the boiler corrosion induced by alkaline copper removal（ACR）reagents in the deposits-cleaning process at high temperatures. The corrosion of steel tubes is examined in a commercial cleaning formula, a mixture of Vertain 675（solvent）and A300（inhibitor）, at temperatures ranging from 100 to 150℃ and 150 to 200℃. The cleaning solution is periodically sampled from the autoclave for analysis of the concentration of metal ions.If the result indicates that metal concentration in the solution increases with time, it implies that the tubeis of boiler corrosion. The corrosion behavior is checked through the results from electro-chemical monitoring and is further confirmed by weight-less measurement. Three kinds of alkaline solvents, such as ammoniated EDTA（ethylenediaminetetraactic acid）, ammoniated NTA（nitrilotriacetic acid）and ETA（ethanolamine）are estimated in combination with one of the inhibitors, which is display（anodic, cathodic and mixed polarization）for development a competitive cleaning formula. The mechanism for deposits-cleaning andcorrosion-inhibition can be figured out because the components in the competitive formulaare chosen according to chelating and inhibitive theories. 研究期間：9009 ~ 9108
