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采用电化学方法、电偶实验和电感耦合等离子体质谱对不同Fe含量的Al-Zn-In-Mg-Ti合金在海水中的电化学性能进行研究.结果表明:Al-5Zn-0.02In-1Mg-0.05Ti-0.1Fe合金开路电位足够负,极化性能较好,并呈现低电阻、高电容特性.耦合电位较负且稳定,耦合电流较高.2 h时的Al和Zn溶解量分别为22μg/L和3.8μg/L,48 h时的扫描电流峰值为36μA,增加了溶解活性点,铝合金的溶解均匀性得到增强.Fe质量分数超过0.1%后,会限制In的活化作用,活性溶解阻力逐渐增大.Fe质量分数为0.1%的Al-Zn-In-Mg-Ti合金具有较好的电化学性能.
The electrochemical performance of Al-Zn-In-Mg-Ti alloy with different Fe content in seawater was studied by electrochemical method, galvanic couple experiment and inductively coupled plasma mass spectrometry.The results showed that the Al-5Zn- -0.05Ti-0.1Fe alloy has a sufficiently negative open circuit potential, good polarization performance, and exhibits low resistance and high capacitance. The coupling potential is negative and stable, and the coupling current is higher. The amounts of dissolved Al and Zn at 2 h are 22μg / L and 3.8μg / L respectively, the peak value of the scanning current was 36μA at 48h, the dissolution activity was increased and the dissolution homogeneity of the aluminum alloy was enhanced.When the Fe content exceeded 0.1%, the activation of In was limited and the activity The dissolution resistance increases gradually.The Al-Zn-In-Mg-Ti alloy with 0.1% Fe mass fraction has good electrochemical performance.