镁含量和硅对铁-锌铝镁合金固-液扩散偶中Fe-Al反应层的影响

doi:10.11896/j.issn.1005-023X.2017.06.013

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Abstract In hot dip galvanization, the formation of Fe-Al compound layer on steel surface affects the growth and quality of coatings. Fe/(Zn-11%Al-3%Mg) and Fe/(Zn-11%Al-x%Mg-0.2%Si) solid-liquid diffusion couples were annealed at 600 ℃ for 25 min. Scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) were adopted to study the effect of Mg content and Si on the formation of Fe-Al reaction layer. The results showed that the reaction layer in Fe/(Zn-11%Al-3%Mg) solid-liquid diffusion couple was composed of FeAl₃ and Fe₂Al₅ phase. With the increase of Mg content, the thickness of the reaction layer in Fe/(Zn-11%Al-x%Mg-0.2%Si) diffusion couple increased firstly, then decreased and increased finally. The thickness of reaction layer was the thinnest when magnesium content was 3%. The average thickness of Fe-Al reaction layer in Fe/(Zn-11%Al-3%Mg) diffusion couple was obviously larger than that in Fe/(Zn-11%Al-3%Mg-0.2%Si) diffusion couple, which proved that Si played a role in inhibiting the formation of Fe-Al reaction layer. The results could be used for explaining the reason that there was no obvious Fe-Al inhibition layer forming in the coating of Super Dyma alloy.

Key words： galvanization solid-liquid diffusion couple interface reaction Fe-Al reaction layer

Published: 25 March 2017 Online: 2018-05-02

CLC number:	TG111.6
	TG113.1

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	Articles by authors
	MA Kun
	LIU Ya
	TU Hao
	SU Xuping
	WANG Jianhua

Cite this article:

MA Kun,LIU Ya,TU Hao, et al. Effect of Mg Content and Si on Fe-Al Reaction Layer in Solid-Liquid
Diffusion Couples of Fe/Zn-Al-Mg Alloys[J]. Materials Reports, 2017, 31(6): 61-65.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.06.013 OR https://www.mater-rep.com/EN/Y2017/V31/I6/61

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