论文部分内容阅读
对自制的一种新型高锰奥氏体耐液锌腐蚀合金在490℃的熔融纯锌液中的腐蚀行为进行了系统的研究,并探讨了其耐液锌腐蚀机理.结果表明,与316L不锈钢相比,新型高锰奥氏体合金具有更好的耐液锌蚀能力,其腐蚀速率为6.42×10-4g.cm-2.h-1,而316L不锈钢的腐蚀速率为1.54×10-3g.cm-2.h-1.新型高锰奥氏体合金在锌液中的最终腐蚀产物为Γ相+δ相+ζ相,而316L不锈钢的腐蚀产物几乎全是ζ相.新型高锰奥氏体合金的腐蚀产物中δ相固溶了质量分数在8.5%左右的Cr,Cr的存在使得δ相稳定性增加,致密的富含Cr的δ相的存在减缓了铁、锌反应速率,提高了新型高锰奥氏体合金的耐液锌腐蚀能力.因此,以锰代镍来制取低成本的新型高锰奥氏体耐液锌腐蚀合金具有可行性.
The corrosion behavior of self-made high manganese austenitic liquid zinc alloy was investigated systematically in molten pure zinc solution at 490 ℃ and the mechanism of liquid zinc corrosion resistance was discussed.The results show that the corrosion resistance of 316L stainless steel In contrast, the new high-manganese austenitic alloy has better liquid zinc corrosion resistance, the corrosion rate of 6.42 × 10-4g.cm-2.h-1, and 316L stainless steel corrosion rate of 1.54 × 10-3g .cm-2.h-1. The final corrosion products of new high-manganese austenitic alloys in liquid zinc are Γ phase + δ phase + ζ phase, while the corrosion products of 316L stainless steel are almost all ζ phase. In the corrosion products of martensitic alloys, the δ phase dissolves in the mass fraction of 8.5% Cr and Cr, the stability of δ phase increases. The dense and Cr-rich δ phase slows down the reaction rate of iron and zinc The new high-manganese austenitic alloy liquid zinc corrosion resistance.Therefore, it is feasible to make low-cost new high manganese austenitic liquid zinc corrosion alloy by manganese nickel.