鋯合金Zr702在鹽酸溶液中之腐蝕性質研究——Fe3+及Cu2+的影響

Corrosion Behavior of Zr702 in HCl Solution—Effects of Fe3+ and Cu2+

本研究主要目的在於評估Fe3+及Cu2+等氧化性離子對Zr702在HCl溶液中之局部腐蝕性質的影響。浸泡試驗之結果顯示，隨著HCl濃度及Fe3+或Cu2+濃度之增加，Zr702之表面腐蝕形態愈形嚴重，且其重量改變量亦隨著增加。浸泡試驗後之試片表面可觀察到許多蝕孔及蝕溝，蝕孔或蝕溝之最大深度則與浸泡時間之平方根成正比。

The effects of Fe3+ and Cu2+ on the localized corrosion behavior of Zr702 in HCl solution were investigated. Surface morphology and weight change after immersion test indicated that the severity of corrosion increased with increasing concentration of HCl, Fe3+ or Cu2+. Pits and grooves were observed. The maximunm depth of pit or groove increased linearly with the square root of time.