应用分离电解池（the split cell）技术将阴阳极分离，通过测定因溶液中氧含量改变和添加CeCl3导致两电极之间的净电流的变化，研究了CeCl3对B95超强铝合金在01 mol/L NaCl溶液中腐蚀行为的影响，并用扫描电子显微镜(SEM)和X射线能量散射谱(EDS)表征电极表面的形貌特征，结合其它电化学技术如电位－时间曲线、极化曲线等手段，对Ce盐缓蚀机理作了深入探讨.结果表明，经Ce盐处理的B95超强铝合金表面可形成一层不均匀分布的转 化膜，成膜动力学包括铝合金的溶解及随后的成膜两个过程；铝合金Ce化学转化膜主要由Ce、O、Al组成；35%NaCl溶液全浸试验表明添加CeCl3后腐蚀率可降低数百倍，铝合金的耐蚀性能大大提高，CeCl3表现为一种优良的铝合金缓蚀成膜剂.
By using a split cell to separate anode and cathode as well as measuring the change of net-electric current between the two electrodes caused by the change of the amount of oxygen in the solution and the addition of CeCl3.The influence of CeCl3 on corrosion behavior of B95 super-strength aluminum alloy in the 0.1 mol/L NaCl solution was studied.Meanwhile,a further discussion about Ce salt inhibition mechanism was carried out by revealing the features of electrode surface with the help of SEM and X-ray energy-dispersive spectrometry (EDS) and resorting to other electric chemical techniques,such as potential-time curve,polarization curve and so on .The results showed that alayer of uneven conversion coatings could appear on the surface of B95 alloy after being dealt with by Ce salt;the dynamics of coating-formation involved two stages:the solution of aluminum alloys and coating-formation fterwards;the cerium conversion coatings were mainly composed of Ce,O and Al elements;the experiment with completely submerging into the solution of 3.5% NaCl showed that the corrosion rate of B95 could be reduced by several hundre d times and the anti-corrosion performance of aluminum alloys improved greatly when CeCl3 were added to the solution.As a result CeCl3 proves to be an excellent coating-formation material and aluminum alloy corrosion inhibitor.
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