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首页> 外文期刊>Materials and Corrosion >Synergistic inhibition between dodecylamine and potassium iodide on the corrosion of cold rolled steel in 0.1 M phosphoric acid
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Synergistic inhibition between dodecylamine and potassium iodide on the corrosion of cold rolled steel in 0.1 M phosphoric acid

机译：十二胺和碘化钾对0.1 M磷酸对冷轧钢腐蚀的协同抑制作用

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摘要

The corrosion inhibition of cold rolled steel in 0.1 M aerated phosphoric acid (H{sub}3PO{sub}4) in the presence of dodecylamine (DDA) and potassium iodide (KI) has been investigated by Tafel polarization curve and electrochemical impedence spectroscopy (EIS) at 20℃. The results obtained from polarization curve show that the inhibition efficiency of DDA with and without KI increases with increase in concentration of DDA but the inhibition efficiency of DDA without KI is not too high. A synergistic effect exists when DDA and KI are combined together to prevent cold rolled steel corrosion in 0.1 M H{sub}3PO{sub}4. All impedance spectra in EIS tests exhibit one capacitive loop which indicates that the corrosion reaction is controlled by charge transfer process. Inhibition efficiencies obtained from Tafel polarization, transfer resistance (R{sub}t) are consistent.
机译：通过Tafel极化曲线和电化学阻抗谱研究了在0.1M充气磷酸（H {sub} 3PO {sub} 4）中十二烷基胺（DDA）和碘化钾（KI）存在下冷轧钢的腐蚀抑制作用（ EIS）在20℃。从极化曲线获得的结果表明，具有和不具有KI的DDA的抑制效率随DDA浓度的增加而增加，但是不具有KI的DDA的抑制效率不是太高。当DDA和KI结合在一起以防止冷轧钢在0.1 M H {sub} 3PO {sub} 4中腐蚀时，存在协同作用。 EIS测试中的所有阻抗谱均显示一个电容回路，表明腐蚀反应受电荷转移过程控制。从Tafel极化，转移电阻（R {sub} t）获得的抑制效率是一致的。

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