CAJ | 학술논문

研制了4种Mn含量不同的Fe-Cr-Mn三元合金,并系统研究和分析了其在450℃熔融锌液中的腐蚀行为及组织变化规律.结果表明,4种不同锰含量的Fe-Cr-Mn三元合金腐蚀层的形貌基本相似,但与纯铁在液锌中的腐蚀形貌差别很大,其主要是由致密的δ相层和分布于η相中稀疏的ζ相颗粒组成,且δ相层厚度随锰含量的提高先增加后减少,其中属含Mn量为9.55%的Fe-Cr-Mn三元合金腐蚀层中致密的δ相层厚度最厚,表现出较好的耐锌蚀能力,同时,此三元合金基体与腐蚀层界面处存在Cr的富集区,此区约含27.48%的Cr,厚度在1μm左右.连续完整的富Cr抑制层的形成,能够减缓铁锌反应的速度,减慢对基体的腐蚀速度,提高了耐锌蚀能力.
연제료4충Mn함량불동적Fe-Cr-Mn삼원합금,병계통연구화분석료기재450℃용융자액중적부식행위급조직변화규률.결과표명,4충불동맹함량적Fe-Cr-Mn삼원합금부식층적형모기본상사,단여순철재액자중적부식형모차별흔대,기주요시유치밀적δ상층화분포우η상중희소적ζ상과립조성,차δ상층후도수맹함량적제고선증가후감소,기중속함Mn량위9.55%적Fe-Cr-Mn삼원합금부식층중치밀적δ상층후도최후,표현출교호적내자식능력,동시,차삼원합금기체여부식층계면처존재Cr적부집구,차구약함27.48%적Cr,후도재1μm좌우.련속완정적부Cr억제층적형성,능구감완철자반응적속도,감만대기체적부식속도,제고료내자식능력.
A systematic study of the corrosion resistance of Fe-Cr-Mn alloys with different manganese content in molten zinc at 450℃ was carried out in this work. It was found that there was no remarkable different corrosion products in four kinds Fe-Cr-Mn alloys, but different from the corrosion of the pure iron in molten zinc. The Fe-Cr-Mn alloys exhibited a compaction δ layer and small ζ particles separated in molten zinc. The corrosion layer of the Fe-Cr alloy with 9.55% Mn had the biggest thickness and had the best corrosion resistant. We observed that between of the alloy and corrosion layer had narrow and continuous layer with less than 1μm thickness. There was a narrow Cr enrichment zone with 27.48%. For the Cr element beneficiation, it can slow up Fe-Zn reaction, reduce the corrosion of the alloy, and also increase corrosion resistance in molten zinc.