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頁籤選單縮合
題名 | 304不銹鋼罅隙腐蝕行為研究--罅隙縱深效應 |
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作者 | 張錦泉; 柏宏基; 林義宗; | 書刊名 | 材料科學 |
卷期 | 26:2 1994.06[民83.06] |
頁次 | 頁161-164 |
分類號 | 440.365 |
關鍵詞 | 罅隙腐蝕; 罅隙縱深效應; 電化學技術; 抑制劑; Crevice corrosion; Crevice depth effect; Electrochemical technique; Inhibitor; |
語文 | 中文(Chinese) |
中文摘要 | 本研究係在固定罅隙間距為100μm,於3.5wtNaCl中性溶液中,分別利 用電化學阻抗圖譜及直流極化法,解析不同罅隙深度(2.4~14cm)對304不�袗�罅隙 腐蝕行為之影響。實驗結果顯示,歐姆降隨罅隙縱深加長而增加,罅隙腐蝕起始 時間則隨罅隙縱深加長而縮短;當罅隙腐蝕起始後,不�袗�表面鈍化膜即迅速被 破壞,終致完全崩潰。另在相同之浸泡時間下測試鈍化膜狀態,結果卻發現其被 破壞程度隨罅隙深度之加長而降低。 此外,實驗結果亦顯示,在3.5wtNaCl溶液中,添加0.5wt Na�浚rO�畦i有效抑制 304不�袗�在不同罅隙縱深內之腐蝕。 |
英文摘要 | Electrochemical impedance spectroscopy and DC polarization techniques were used to study the effects of the crevice depth on the crevice corrosion behavior of 304 stainless steel in 3.5wt NaClsolution. The crevice gap was 100 μm and the crevice depth was 2.4~14cm in this work. Experimentalresults indicated that IR drop was increased with the increase of the crevice depth. However, the time required to initiate the crevice corrosion was decreased with the increase of the crevice depth. As the crevice corrosion initiated, the passive film on stainless steel surface would be destroyed rapidly, then broken down completely. Furthermore, it was also found that the break-down percentage of the passive film was decreased with the increase of the crevice depth when tested by the same period of immersion time. In addition, it was also found that adding 0.5wt Na�浚rO�� into 3.5wt NaCl solution could effectively inhibit the corrosion of 304 stainless steel with different crevice depths in this study. |
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