ABSTRACT In this study, corrosion behaviour of double-phase Al1.3CrFeNi chemically complex alloy was investigated, including hot corrosion and electrochemical corrosion. Hot corrosion behaviour of Al1.3CrFeNi alloy was explored in molten 75 wt-% Na2SO4 + 25 wt-% NaCl salt. The result revealed that the corrosion kinetic curve of Al1.3CrFeNi alloy followed the exponential rate rule through mass loss measurement. In addition, it prevented that the formed corrosion layer had obvious stratification including external granular Al2O3 and inner porous Cr2O3 when corrosion time was up to 100 h. Besides, it should be noted that the Al1.3CrFeNi alloy was sensitive to the molten salt containing chlorine, which makes the alloy surface leave voids and bring about acceleration of corrosion. Meanwhile, electrochemical corrosion resistance of Al1.3CrFeNi alloy in NaCl solution with different concentrations (0.6, 1.0 and 2.0 mol L−1) was investigated at room temperature. The results revealed that Al1.3CrFeNi alloy showed superior corrosion resistance in NaCl solution due to the existence of Al and Cr which aid the formation of protective oxide layer.

中文翻译：

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Al1.3CrFeNi化学复合合金的腐蚀行为

摘要 在这项研究中，研究了双相 Al1.3CrFeNi 化学复合合金的腐蚀行为，包括热腐蚀和电化学腐蚀。研究了 Al1.3CrFeNi 合金在 75 wt-% Na2SO4 + 25 wt-% NaCl 盐溶液中的热腐蚀行为。结果表明，通过质量损失测量，Al1.3CrFeNi合金的腐蚀动力学曲线遵循指数速率规律。此外，当腐蚀时间达到100 h时，防止形成的腐蚀层出现明显的分层，包括外部颗粒状Al2O3和内部多孔Cr2O3。另外需要注意的是，Al1.3CrFeNi合金对含氯的熔盐敏感，使合金表面留有空隙，加速腐蚀。同时，Al1.2 的耐电化学腐蚀性能。在室温下研究了 3CrFeNi 合金在不同浓度（0.6、1.0 和 2.0 mol L-1）的 NaCl 溶液中。结果表明，Al1.3CrFeNi合金在NaCl溶液中表现出优异的耐腐蚀性，因为Al和Cr的存在有助于形成保护性氧化层。