Electrodeposited Zn-Ni coatings are known to posses a high corrosion resistance in many aggresive environments. Apart chemical composition, the protective ability of Zn-Ni coatings depends mainly on their microstructure and phase composition. In the present study the Zn-Ni alloys (with Ni content up to 20 wt. %) were electrodeposited on steel substrates from a sulphate bath of different [Ni]/[Zn] concentration ratio with the addition of sodium citrate or ammonium sulphate. The influence of operating variables (electrolyte composition, pH, cathode current density) on the chemical and phase composition of Zn-Ni coatings was determined.
Non-equilibrium phase composition of electrodeposited Zn-Ni alloys / E., Beltowska Lehman; P., Ozga; Z., Swiatck; M., Michalec; Lupi, Carla. - STAMPA. - (2004), p. 152. (Intervento presentato al convegno CALPHAD XXXIII tenutosi a Krakov, Poland nel May30-June4, 2004).
Non-equilibrium phase composition of electrodeposited Zn-Ni alloys
LUPI, Carla
2004
Abstract
Electrodeposited Zn-Ni coatings are known to posses a high corrosion resistance in many aggresive environments. Apart chemical composition, the protective ability of Zn-Ni coatings depends mainly on their microstructure and phase composition. In the present study the Zn-Ni alloys (with Ni content up to 20 wt. %) were electrodeposited on steel substrates from a sulphate bath of different [Ni]/[Zn] concentration ratio with the addition of sodium citrate or ammonium sulphate. The influence of operating variables (electrolyte composition, pH, cathode current density) on the chemical and phase composition of Zn-Ni coatings was determined.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
