𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Electrochemical behavior of titanium-tantalum alloys in sulfuric acid solutions

✍ Scribed by K. A. de Souza; A. Robin

Publisher
John Wiley and Sons
Year
2004
Tongue
German
Weight
487 KB
Volume
55
Category
Article
ISSN
0947-5117

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Titanium exhibits a good corrosion resistance in oxidizing acids and neutral media but it is severely attacked in reducing acids. On the contrary, tantalum presents an excellent resistance in both oxidizing and reducing acids, but its high cost limits its use to very aggressive conditions. The titanium‐tantalum alloys are promising materials for use in reducing acids, due to their lower cost and density when compared to tantalum, and their higher corrosion resistance when compared to titanium. Titanium‐20, 40, 60 and 80 wt% tantalum alloys were prepared by arc‐melting and their microstructures were characterized by scanning electron microscopy and X‐ray diffractometry. Their electrochemical behaviors were studied in 20 to 80 wt% sulfuric acid solutions at room temperature, using open‐circuit potential measurements, potentiodynamic polarization and electrochemical impedance spectroscopy. Different behaviors were observed depending on the tantalum content and acid concentration. A clear tendency of increase in corrosion resistance with the increase of tantalum content is observed, especially in 80 wt% sulfuric acid solutions.

📜 SIMILAR VOLUMES

Electrochemical behavior of cobalt–chrom
Electrochemical behavior of cobalt–chromium alloys in a simulated physiological solution
✍ Bruce G. Pound 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 373 KB

## Abstract Several cobalt–chromium alloys such as MP35N are used for biomedical implants. The electrochemical behavior of these alloys in the passive range differs from that of other biomedical alloys. In particular, their cyclic potentiodynamic polarization curves exhibit an increase in current a

The influence of tin and silver as micro
The influence of tin and silver as microstructure modifiers on the corrosion rate of Pb–Ca alloys in sulfuric acid solutions
✍ M. I. Čekerevac; E. Romhanji; Z. Cvijović; L. N. Bujanović 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 German ⚖ 365 KB 👁 1 views

## Abstract The effect of microstructure modifiers, Sn and Ag, on the corrosion rate of commercial Pb–Ca alloy in H~2~SO~4~ electrolyte was investigated by the potentiodynamic polarization and by the weight loss corrosion rate measurement at the open circuit potential. The effect of microstructure