The effect of copper alloying element on the corrosion characteristics of Ti-Ni and ternary Ni-Ti-Cu meltspun shape memory alloy ribbons in 0.9% NaCl solution

Abstract:

This paper provides a new insight towards understanding the mechanism of corrosion of ternary Ni-Ti-Cu shape memory alloy ribbons manufactured by meltspinning in 0.9% NaCl solution. A new mechanism has been proposed to explain the pitting susceptibility and the role of copper on the Ni diffusion in Ti-Ni and Ti-Ni-Cu alloys. It has been evidenced that pitting is the most predominant corrosion form in Ti-Ni due to Ni dissolution. The presence of copper improved the resistance to pitting corrosion. Results showed that the most predominant corrosion form in Ti-Ni-Cu is general corrosion with some pits. The new findings will help the manufactures of shape memory alloys (SMAs) in designing materials of better durability and longer life time. © 2013 by ESG.

Año de publicación:

2013

Keywords:

• Rapid solidification
• Shape memory alloys
• Pitting corrosion
• Ti-Ni-Cu

Fuente:

scopus