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 Influence of the addition of aluminium into molten zinc bath on the kinetics of formation of intermetallic phases in the system Fe—Zn

P. Fellner, Ž. Lubyová, and D. Pohl

Institute of Inorganic Chemistry, Slovak Academy of Sciences, 842 36 Bratislava


Abstract: The formation kinetics of intermetallic phases in the systems Fe-Zn and FeZn-1% Al were investigated at 735 K. Thicknesses of the intermetallic layers were detd. by using a metallog. microscope and x-ray microanalyzer. The addn. of Al influences mainly formation of Zn-rich phases and has almost no influence on the growth of other intermetallic phases. The mean interdiffusion coeff. in phases Γ1 and Γ was 3 × 10-10 cm2s-1. Growth of phases (δ1 + ζ) in the time interval 0-8 min was described by a parabolic relation. When 1% Al was added to the Zn bath, growth of δ1-FeZnand ζ-FeZn13   phases depended on pretreatment of the steel substrate. Pretreatment with an HCl soln. resulted in growth kinetics different from those for an NH4Cl-ZnCl2 soln. treated substrate.

Full paper in Portable Document Format: 363a327.pdf


Chemical Papers 36 (3) 327–332 (1982)

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