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Study of electrodeposition of Fe-Mo-P and Fe-W-P ternary alloys. Characterization of films.

Grant number: 13/05821-2
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): January 01, 2014
Effective date (End): November 30, 2016
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
Principal researcher:Ivani Aparecida Carlos
Grantee:Elton Patrick Barbano
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated scholarship(s):15/21788-0 - Electrodeposition of ternary alloys Fe-Mo-P and Fe-W-P. Coatings characterization, BE.EP.DR

Abstract

Our research group has been specialized in the development and study of baths non cyanides and absence of citrate anions to the electrodeposition of alloys, since cyanide bath exhibit high toxicity and bath containing citrate may decompose during the deposition process. Also, we have been concerned with simplifying of the baths in relation to the reduced number of additives present therein. Among the systems of interest to our group is the electrodeposition of Fe-Mo and Fe-W containing P, then, is reported in the literature that the electrodeposited alloys of iron group containing phosphorus may have a number of properties, for example, corrosion resistance. The baths used in the Fe-Mo, Fe-W and Fe-P electrodeposition are generally based on citrate, which are very sensitive to changes in pH of the bath; may be reduced at the cathode and also to form organic substances, that becomes the control of the processes difficult. Moreover, these substances may be incorporated to electrodeposit modifying their properties. Thus, in this design, it is intended to study and develop baths for deposition of Fe-Mo-P e Fe-W-P onto Pt substrate in the presence of NTA (nitrilotriacetic acid), alternative to the baths based on citrate used in the deposition of alloys Fe-Mo, Fe-W and Fe-P. To establish the conditions under which the baths are stable in relation to the concentration of metal ions and the acidity of the medium, we use mixture design. This is of great importance for the application of these baths, in the production of the alloys Fe-Mo-P and Fe-W-P. Characterization of Fe-Mo-P and Fe-W-P electrodeposits obtained from baths to be developed, at different deposition potential and current densities will be performed by Scanning Electron Microscopy (SEM); X-ray Dispersive Energy Spectroscopy (EDS), X-ray diffraction (XRD) and atomic force microscopy (AFM), the latter will be used to investigate the initial stages of the deposition process of these alloys. Also for better understanding of these results will apply chemometric tools such as Principal Component Analysis (PCA) and Hierarchical Cluster Analysis (HCA).

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
BARBANO, ELTON P.; DE CARVALHO, MARCOS F.; CARLOS, IVANI A. Electrodeposition and characterization of binary Fe-Mo alloys from trisodium nitrilotriacetate bath. Journal of Electroanalytical Chemistry, v. 775, p. 146-156, AUG 15 2016. Web of Science Citations: 6.
DE ALMEIDA, MOACYR RODRIGO H.; BARBANO, ELTON PATRICK; ZACARIN, MARIA G.; DE BRITO, MATHEUS M.; TULIO, PAULO CEZAR; CARLOS, IVANI APARECIDA. Electrodeposition of CuZn films from free-of-cyanide alkaline baths containing EDTA as complexing agent. SURFACE & COATINGS TECHNOLOGY, v. 287, p. 103-112, FEB 15 2016. Web of Science Citations: 10.

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