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研究了四种不同Mn含量的铁锰二元合金在450℃液锌中的腐蚀行为,探讨了Mn对铁锌反应的影响规律。结果表明,铁锰二元合金在液锌中的腐蚀属于溶解性腐蚀。随着锰含量的增加,腐蚀速率有较大变化。含锰量为10wt%的合金,其腐蚀速率为5.79×10-3g.cm-2.h-1,含锰量为15wt%的合金,其腐蚀速率为3.64×10-2.gcm-2.h-1。锰含量为10wt%时,腐蚀产物由致密的δ相层和块状的ζ相层组成,致密的较厚的δ相层的存在,降低了铁锌反应速率,合金表现出较好的耐液锌腐蚀能力,而锰含量为15wt%时,腐蚀产物由大量疏松的颗粒状ζ相分布在液锌相中组成,疏松的组织恶化了合金的耐液锌腐蚀能力。
The corrosion behavior of four kinds of Fe-Mn binary alloys with different Mn contents in liquid zinc at 450 ℃ was studied. The effect of Mn on the iron-zinc reaction was also discussed. The results show that the corrosion of iron-manganese binary alloy in liquid zinc belongs to dissolution corrosion. With the increase of manganese content, the corrosion rate has a greater change. The alloy containing 10wt% manganese had the corrosion rate of 5.79 × 10-3g.cm-2.h-1 and the alloy containing 15wt% manganese with the corrosion rate of 3.64 × 10-2.gcm-2. h-1. When the content of manganese is 10wt%, the corrosion products consist of a dense δ-phase layer and a massive ζ-phase layer, and the presence of a dense, thick δ-phase layer reduces the iron-zinc reaction rate and the alloy exhibits better resistance to liquid Zinc corrosion ability, while the manganese content of 15wt%, the corrosion products by a large number of loose granular zeta phase distribution in the liquid zinc phase composition, loose tissue deterioration of the liquid zinc resistance of the alloy corrosion.