Structure of as-deposited and heat-treated iron-zinc coatings from chloride bath
- Sandia National Labs., Albuquerque, NM (United States)
- Lehigh Univ., Bethlehem, PA (United States)
The iron content, phase constitution, and microstructure of electrodeposited iron-zinc alloy (EZA) coatings, deposited from chloride baths, is described for as-deposited and heat-treated conditions of coatings containing bulk iron contents of 6, 8, 10, and 13 w/o. The observed influence of current density upon iron content, which in turn influences the phase constitution and microstructure of the coatings, is reported. The microstructure, composed of non-equilibrium phases that have nanometer grain sizes, is illustrated and described with respect to iron content, crystallography, and morphology. As-deposited {eta} phase coatings undergo transformations through a sequence of metastable phases when heated. The sequence of phase transformations varies with iron content, but the mechanisms of phase transformation from the as-deposited eta phase to the metastable G phase was found to be similar in 6, 8, and 10 w/o Fe coatings. Microstructural, compositional, and crystallographic changes associated with this phase transformation are discussed.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 10102434
- Report Number(s):
- SAND-93-1876C; CONF-940204-1; ON: DE93040046
- Resource Relation:
- Conference: 123. annual meeting of the Minerals, Metals and Materials Society,San Francisco, CA (United States),27 Feb - 3 Mar 1994; Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
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