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采用电化学腐蚀测试技术对钒与V-5Cr-5Ti合金在氯离子溶液中的电化学腐蚀行为进行了研究。结果表明,在50μg/gCl-的氯化钾溶液中,钒的腐蚀电位高于V-5Cr-5Ti合金而具有更好的热力学稳定性;相对于V-5Cr-5Ti合金,钒具有较大的极化电阻和较小的腐蚀电流;钒与V-5Cr-5Ti合金具有相似的阴极极化行为;在阳极极化过程中,钒主要表现为Tafel行为,而V-5Cr-5Ti合金具有“伪钝化”和钝化行为;二者均具有负的循环极化滞后环;钒的抗腐蚀性能优于V-5Cr-5Ti合金。
The electrochemical corrosion behavior of vanadium and V-5Cr-5Ti alloy in chloride solution was investigated by electrochemical corrosion test. The results showed that the corrosion potential of vanadium was higher than that of V-5Cr-5Ti alloy in the 50μg / gCl-KCl solution, and the vanadium had a higher thermodynamic stability than the V-5Cr-5Ti alloy Polarization resistance and smaller corrosion current. Vanadium has similar cathodic polarization behavior to V-5Cr-5Ti alloy. During anodic polarization, vanadium mainly behaves as Tafel, while V-5Cr-5Ti alloy has a “ Pseudo-passivation ”and passivation behavior; both have a negative cyclic polarization hysteresis loop; the corrosion resistance of vanadium is superior to the V-5Cr-5Ti alloy.