| Journal: | Quimica nova |
| Database: | PERIÓDICA |
| System number: | 000313392 |
| ISSN: | 0100-4042 |
| Authors: | Santana, Renato Alexandre Costa de1 Campos, Ana Regina Nascimento Prasad, Shiva Leite, Valderí D2 |
| Institutions: | 1Universidade Federal de Campina Grande, Departamento de Engenharia Quimica, Campina Grande, Paraiba. Brasil 2Universidade Estadual da Paraiba, Departamento de Quimica, Campina Grande, Paraiba. Brasil |
| Year: | 2007 |
| Season: | Abr |
| Volumen: | 30 |
| Number: | 2 |
| Pages: | 360-365 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | A study on optimization of bath parameters for electrodeposition of Fe-W-B alloys from plating baths containing ammonia and citrate is reported. A 2³ full factorial design was successfully employed for experimental design analysis of the results. The corrosion resistance and amorphous character were evaluated. The bath conditions obtained for depositing the alloy with good corrosion resistance were: 0.01 M iron sulfate, 0.10 M sodium tungstate and 0.60 M ammonium citrate. The alloy was deposited at 12% current efficiency. The alloy obtained had Ecorr -0.841 V and Rp 1.463 x 10(4) Ohm cm². The deposit obtained under these conditions had an amorphous character and no microcracks were observed on its surface. Besides this, the bath conditions obtained for depositing the alloy with the highest deposition efficiency were: 0.09 M iron sulfate, 0.30 M sodium tungstate and 0.50 M ammonium citrate. The alloy was deposited at 50% current efficiency, with an average composition of 34 wt% W, 66 wt% Fe and traces of boron. The alloy obtained had Ecorr -0.800 V and Rp 1.895 x 10³ Ohm cm². Electrochemical corrosion tests verified that the Fe-W-B alloy deposited under both conditions had better corrosion resistance than Fe-Mo-B |
| Disciplines: | Ingeniería, Química |
| Keyword: | Ingeniería de materiales, Ingeniería química, Aleaciones hierro-wolframio-boro, Electrodeposición, Resistencia a la corrosión |
| Keyword: | Engineering, Chemistry, Chemical engineering, Materials engineering, Iron-wolframium-boron alloys, Electrodeposition, Corrosion resistance |
| Full text: | Texto completo (Ver HTML) |
