本研究利用慢速拉伸試驗(Slow Strain Rate Tensile tests, SSRT)對304不鏽鋼在沸水式反應器起動過程之不同溫度下應力腐蝕龜裂敏感性(stress corrosion cracking susceptibility)進行測試。分別在四個試驗溫度150 °C、200 °C、250 °C和288 °C進行，包含一般水化學條件(Normal Water Chemistry, NWC)和加氫水化學(Hydrogen Water Chemistry, HWC)，藉此探討304不鏽鋼應力腐蝕龜裂敏感性在一般水化學下之溫度效應以及加氫水化學之防蝕效益評估。
試驗結果顯示，在150 °C之低溫下，由於應力腐蝕龜裂之驅動力不足，一般水化學和加氫水化學之結果均無任何SCC出現。在一般水化學之不同溫度下，304不鏽鋼之應力腐蝕龜裂敏感性由高至低依序是250 °C、288 °C和200 °C，破斷面分析結果顯示在200 °C、250 °C下應力腐蝕龜裂之行為屬多重裂縫成長，而288 °C為單一裂縫成長，在250 °C下由於多重裂縫成長且發生了裂縫接合之現象，因此其應力腐蝕龜裂敏感性高於相對於更高溫之288 °C；而加氫水化學之結果顯示，在200 °C、250 °C或288 °C下之破斷面分析結果均未發現沿晶應力腐蝕龜裂之出現，各溫度之結果均顯示有較一般水化學環境下更多之二次裂口，但其應是頸縮區累積了大量應變所致，此結果並不影響加氫水化學對應力腐蝕龜裂之抑制效果。

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