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Structure of as-deposited iron-zinc coatings from chloride bath

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Abstract

The iron content, phase constitution, and microstructure of electrodeposited iron-zinc alloy coatings deposited from chloride baths were investigated. It was found that the iron content of the coatings varied with the current density used during processing and that coatings containing 6 to 13 wt pct Fe consisted of nonequilibrium phases, η andG. η phase, hexagonal close-packed (hcp) zinc supersaturated with iron to about 8 wt pct Fe, contained nanometer-size crys-tals divided by 30-nm-wide growth steps. Within the growth steps, an amorphous phase was present. TheG phase, a body-centered cubic (bcc) phase similar to equilibrium γ phase, existed as equiaxed 30- to 80-nm-wide grains in 10 and 13 wt pct Fe coatings. It is suggested that the microstructure of higher iron content coatings resulted from a recovery/polygonization process.

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Authors and Affiliations

  1. 18015, Bethlehem, PA

    C. A. Drewien, J. I. Goldstein & A. R. Marder (Professor of Materials Science and Engineering)

Authors
  1. C. A. Drewien
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  2. J. I. Goldstein
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  3. A. R. Marder
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Additional information

C.A. Drewien, formerly with Lehigh University, is a Senior Member-Technical Staff in the Materials Process and Sciences Center at Sandia National Laboratories, Albuquerque, NM 87185. J.I.

Goldstein, formerly with Lehigh University, is Dean of Engineering at the University of Massachusetts-Amherst, Amherst, MA 01003.

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Drewien, C.A., Goldstein, J.I. & Marder, A.R. Structure of as-deposited iron-zinc coatings from chloride bath. Metall Mater Trans A 25, 249–255 (1994). https://doi.org/10.1007/BF02647970

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