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中文摘要：
采用极化曲线，塔菲尔图（Tafel Plot），交流阻抗（EIS）及浸泡腐蚀技术，研究了激光熔化沉积γ／Mo2Ni3Si合金在不同酸，碱，盐介质中的腐蚀行为。结果表明，该合金在1mol／L NaOH溶液中，由于形成了稳定的钝化膜，耐蚀性优异；在1mol／LH2SO4溶液中，合金只能形成不稳定的钝化膜；而在含Cl^-的中性或酸性介质中，合金没有钝化趋势，且由浸泡腐蚀试验表明，在1mol／LHCl溶液中，由于Cl^-导致相界腐蚀，合金耐蚀性较差。
英文摘要：
The corrosion behavior of Laser melting-deposited γ/Mo2Ni3Si alloy consisting of Mo2Ni3Si primary dendrites and Mo2Ni3Si/γ eutectic matrix in different mediums were investigated by polarization curve, Tafel Plot, EIS and immersion corrosion. Results showed that the alloy has excellent corrosion resistance in NaOH solution of 1 mol/L owing to the formation of stable passivation film. Unstable passivation film was formed in H2SO4 solution of 1 mol/L. No passivation occurred in neutral or acid solutions containing Cl^- The alloy exhibited very poor corrosion resistance during the immersion test in HCI solution of 1 mol/L due to the preverential phase-boundary corrosion by Cl^-.
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