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.
马坤, 刘亚, 涂浩, 苏旭平, 王建华. 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[J]. 《材料导报》期刊社, 2017, 31(6): 61-65.
MA Kun, LIU Ya, TU Hao, SU Xuping, WANG Jianhua. Effect of Mg Content and Si on Fe-Al Reaction Layer in Solid-Liquid Diffusion Couples of Fe/Zn-Al-Mg Alloys. Materials Reports, 2017, 31(6): 61-65.
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2017, Vol. 31 
