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为考察Ｍｎ对Ｆｅ３Ａｌ金属间化合物耐蚀性能的影响，测定了四种成分的合金在三种介质中的电化学腐蚀特性，并对其微观机理进行了初步分析．结果表明，Ｍｎ的加入对Ｆｅ３Ａｌ基合金在三种介质中的腐蚀类型无显著影响；试验合金在３．５％ＮａＣｌ溶液中以点蚀为主要特征，伴有缝隙腐蚀；在１Ｎ的ＮａＯＨ和０．５Ｎ的Ｈ２ＳＯ４溶液中以均匀腐蚀为主，在０．５Ｎ的Ｈ２ＳＯ４中还伴有点蚀；当Ｍｎ的加入量适当（不致引入新相）时，可使试验合金在３．５％ＮａＣｌ和０．５Ｎ的Ｈ２ＳＯ４溶液中的腐蚀速度显著降低
In order to investigate the effect of Mn on the corrosion resistance of Fe3Al intermetallic compounds, the electrochemical corrosion properties of the four alloys were measured and the microscopic mechanism was analyzed. The results show that the addition of Mn has no significant effect on the corrosion type of Fe3Al-based alloy in three media. The pitting corrosion is the main characteristic of the experimental alloy in 3.5% NaCl solution with crevice corrosion. When NaOH and 0 .5N H2SO4 solution to uniform corrosion, 0.5N H2SO4 is also accompanied by pitting; when the amount of Mn added (not to introduce a new phase), the test alloy can be 3.5% NaCl and 0 The corrosion rate in .5N H2SO4 solution is significantly reduced