Characterization of electrodeposited Fe-W AND Fe-P-W alloys
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VERNICKAITE, E., ANTAR, Zied, PADGURSKAS, Juozas, CESIULIS, Henrikas. Characterization of electrodeposited Fe-W AND Fe-P-W alloys. In: Materials Science and Condensed Matter Physics, Ed. 7, 16-19 septembrie 2014, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2014, Editia 7, p. 285.
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Materials Science and Condensed Matter Physics
Editia 7, 2014
Conferința "Materials Science and Condensed Matter Physics"
7, Chișinău, Moldova, 16-19 septembrie 2014

Characterization of electrodeposited Fe-W AND Fe-P-W alloys


Pag. 285-285

Vernickaite E.1, Antar Zied2, Padgurskas Juozas3, Cesiulis Henrikas1
 
1 Vilnius University,
2 University of Sfax,
3 Aleksandras Stulginskis University
 
Proiecte:
 
Disponibil în IBN: 18 martie 2019


Rezumat

The aim of this work was to study the corrosion and tribological properties of Fe-W and Fe-P-W alloys deposited from the citrate-ammonia baths with different FeSO4 concentrations but resulting the similar W content as 25-27 at.% and 0-1.7 at.% of P. Thin films were electrodeposited under direct current mode at 30 mA/cm2 and at 70 ºC. SEM images of as-deposited Fe-W and Fe-W-P coatings at pH 8 are shown in Fig. 1. It can be seen that the presence of sodium hypophosphate in the electrolyte results evidently smaller grain sizes. Notably, the addition of phosphorous does not affect the W content in the alloys.  The corrosion tests were performed in 0,012 M Na2SO4 and 0,027 M NaCl solution (pH 5) at 90 ºC by means of electrochemical impedance spectroscopy. Fe-W-P coating shows the higher corrosion resistance in comparison with Fe and Fe-W alloy coatings.   The friction coefficient is lower for Fe-P-W alloy deposited from the bath containing minimal concentration of FeSO4, whereas the microhardness is higher for Fe-W alloys also deposited from the baths with minimal concentration of FeSO4.