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題 名 | 含氯物質對不銹鋼之腐蝕研究 |
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作 者 | 李豐祥; | 書刊名 | 技術學刊 |
卷 期 | 10:4 1995.12[民84.12] |
頁 次 | 頁465-472 |
分類號 | 440.365 |
關鍵詞 | 腐蝕; 不銹鋼; 氯離子; Corrosion; Stainless steel; Chloride ion; |
語 文 | 中文(Chinese) |
中文摘要 | 選擇18Cr-8Ni (A) 和18Cr-12Ni-3.5Mo-0.030C (B) 兩種不銹鋼,並分別焊接後製作試片,再用不同的方式加工,包括以酸洗劑酸洗處理和磨光至#1801後以中性洗潔精清洗。然後以三種方法進行試驗:(1) 浸漬於pH=2.8之稀鹽酸廢水,(2) 浸漬於15%HCl溶液,(3) 置放於含HCl空氣流中,其結果並與空白比較。最後發現在15%HCl溶液中,B.之腐蝕率在0.5rnpy以下,而A之母材約12mpy,A有焊道者約27-51rnpy。又在會HCl之濕熱空氣流中,在達露點以下時,兩種材質均有明顯孔蝕現象,B之腐蝕率約1mpy,A約3-4 mpy。證實在含氯離子環境中,B比A之耐蝕,性佳。另外發現焊道及熱影響區經酸洗或研磨後對防止孔蝕有明顯效果。而在防止母材之孔蝕現象,酸洗無效果,但研磨則有效果。 |
英文摘要 | Two kinds of stainless steels, 18Cr-8Ni(A) and 18Cr-12Ni-3.5Mo-0.030C(B), were chosen to make the test pieces by welding, which were washed with pickling inhibitor or polished to #180 first, then cleaned with liquid detergent. In order to examine the corrosion, three different tests were conducted: (1) by immersion in a very dilute hydrochloric acid waste water (pH=2.8), (2) by immersion in 15% HCl solution, and (3) to be tested in the vent gas flow with HCl vapor. Results were compared with a blank. It was shown that B has a better corrosion resistance than Ain the chloride environment according to the corrosion rate in 15% HCl solution which revealed less than 0.5 mpy for B, about 12 mpy for the mother material of A and 27-51 mpy for A after welding. While in the vent gas flow with HCl below dew point, it was found to be about 1 mpy for B, and 3-4 mpy for A, though both showed apparent pittings. Furthermore, apparent effects were observed in preventing pitting corrosion around both the welding line and the heat influence area after any of the post-welded treatment. For the mother material, polishing process shows the effect, but pickling process does not. |
本系統中英文摘要資訊取自各篇刊載內容。