本文選題：預銹　切入點：低合金鋼筋　出處：《建筑材料學報》2017年02期

【摘要】：通過電化學阻抗譜(EIS)、背散射電子(BSE)圖像與能譜分析(EDS)研究了大氣預銹對低合金鋼筋和普通低碳鋼筋在混凝土模擬液中氯鹽腐蝕行為的影響.結果表明:大氣預銹作用影響2種鋼筋鈍化膜的生成;氯鹽侵蝕后,大氣預銹作用降低了低碳鋼筋的耐蝕性,但低合金鋼筋的耐蝕性不受預銹作用影響,原因是低合金鋼筋基體與氧化皮間的縫隙內形成了致密的富Cr銹層,抑制了氯鹽對鋼筋基體的進一步侵蝕.
[Abstract]:The effect of atmospheric prerust on chloride corrosion behavior of low alloy steel bar and ordinary low carbon steel bar in concrete simulated solution was studied by electrochemical impedance spectroscopy (EIS), backscatter electron beam (BSE) image and energy spectrum analysis (EDS). The results show that the atmospheric prerust is the most important factor in the corrosion behavior of low alloy steel bar and ordinary low carbon steel bar in concrete simulation solution. The formation of passivation film of two kinds of reinforcing bar is affected by the action. The corrosion resistance of low alloy steel bar is not affected by the corrosion resistance of low alloy steel bar due to the formation of dense Cr-rich rust layer in the gap between the base of low alloy steel bar and the oxide sheet. The corrosion resistance of low alloy steel bar is not affected by the corrosion resistance of low alloy steel bar after chlorine salt erosion, but the corrosion resistance of low alloy steel bar is not affected by the pre rust action. Further erosion of reinforcement matrix by chloride salt was restrained.
【作者單位】： 東南大學江蘇省土木工程材料重點實驗室;
【基金】：江蘇省產學研聯合創(chuàng)新基金資助項目(BY2013091) 國家重點基礎研究發(fā)展計劃(973計劃)項目(2015CB655100) 國家自然科學基金資助項目(51208098,51678144)
【分類號】：TU528
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本文編號：1673197