Influence of IR Drop on the Results of Electrochemical Measurement of Rebar Corrosion in Concrete
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摘要: 介紹了在混凝土介質中進行鋼筋腐蝕電化學測量時產生的IR降對測量結果的影響,以及由此可能造成判斷上的失誤或評估上的錯誤.通過一種新的混凝土鋼筋腐蝕的電化學測量方法(稱為恒電流瞬斷法),不僅可以有效的消除混凝土中的IR降影響,還可同時消除混凝土中鋼筋表面發生的濃差極化的影響,得到只有電化學極化作用的穩態極化曲線.通過此方法測量得到的數據,可以仿照"穩態法"來計算電化學步驟的動力學參數.Abstract: Describes the influence of the concrete JR drop on the results of electrochemical measurements carried out on reinforcing steel corrosion in concrete and the resulted errors in judgement or evaluation of rebar corrosion. Through a new electrochemical measuring method i.e transient switch method conducted on reinforcing steel corrosion in concrete, not only the influence of JR drop but also the influence of concentration polarization in rebar surface can be effectively eliminated. Thus polarization curves can be obtained under the influence of electrochemical polarization only. Kinetics parameters of the electrochemical processes can be calculated referring to stationary methods using the data obtained.
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Key words:
- transient switch method /
- JR drop /
- rebar corrosion /
- electrochemical polarization /
- concrete
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