通过草酸浸蚀试验、动电位扫描测试、自腐蚀电位测试、电偶腐蚀试验和扫描电镜（SEM）观察，研究镍基合金Incoloy800、Incoloy840以及用它们制成的加热管在试验条件下的腐蚀情况；分析加工工艺对两种镍基合金腐蚀性能的影响；比较两种镍基合金加热管抗腐蚀性能的差异。结果表明，加工工艺显著降低了Incoloy840镍基合金的点蚀电位，对Incoloy800镍基合金的点蚀电位影响较小；对两种镍基合金晶间腐蚀敏感性几乎都没有影响；Incoloy800加热管试样品间腐蚀敏感性小于Incoloy840加热管；Incoloy800加热管点蚀电位高于Incoloy840加热管；白腐蚀电位高低顺序为：Incoloy800加热管，Incoloy840加热管，Mg；Incoloy800加热管／镁电偶对电偶电流密度大于lncoloy840加热管/镁电偶对，lncoloy800加速电偶阳极镁腐蚀的作用更大。
The corrosion performance of Ni-based alloy Incoloy800 and Incoloy840 was studied by oxalic acid etch test, potentiodynamic polarization test, galvanic corrosion experiment and SEM. The influence of processing on the corrosion resistance of these two alloys was also discussed. The results showed that alloy Incoloy800 and the heating tube made of it had better intergranular corrosion resistance compared with Incoloy840 and the tube made of it. Pitting potential of Incoloy840 decreased significantly and Incoloy800 ahnost showed little change in pitting potential after processing. The galvanic current density of Incoloy800 heating tube/Mg was higher than that of Incoloy840 heating tube/Mg, indicating that Incoloy800 accelerated the corrosion rate of Mg anode more remarkably.
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