Corrosion behaviour of amorphous Ti48Cu52, Ti50Cu50 and Ti60Ni40 alloys investigated by potentiodynamic polarization method

Bulletin of materials science

A Dhawan²  S K Sharma²  S Roychowdhury¹  P K De¹ 

[1] Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400 085, IndiaMaterials Science Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$;Department of Physics, Malaviya National Institute of Technology, Jaipur 302 017, India$$Department of Physics, Malaviya National Institute of Technology, Jaipur 302 017, IndiaDepartment of Physics, Malaviya National Institute of Technology, Jaipur 302 017, India$$

关键词: Amorphous alloys;    polarization;    potentiodynamic;    corrosion.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Potentiodynamic polarization studies were carried out on virgin specimens of amorphous alloys Ti₄₈Cu₅₂, Ti₅₀Cu₅₀ and Ti₆₀Ni₄₀ in 0.5 M HNO₃, 0.5 M H₂SO₄ and 0.5 M NaOH aqueous media at room temperature. The value of the corrosion current density (𝐼_corr) was maximum for Ti₄₈Cu₅₂ alloy in all the three aqueous media as compared to the remaining two alloys. The value of 𝐼_corr for the alloy Ti₄₈Cu₅₂ was maximum (𝐼_corr = 2.6 Ã�? 10^-5 A/cm²) in 0.5 M H₂SO₄ and minimum (𝐼_corr = 3.5 Ã�? 10^-6 A/cm²) in 0.5 M NaOH aqueous solutions. In contrast, the alloy Ti₆₀Ni₄₀ exhibited the least corrosion current density in 0.5 M HNO₃ (𝐼_corr = 4.0 Ã�? 10^-7 A/cm²) and in 0.5 M NaOH (𝐼_corr = 5.5 Ã�? 10^-7 A/cm²) aqueous media as compared to those for Tiâ€�?�Cu alloys, while its value in 0.5 M H₂SO₄ was comparable to that for Ti₅₀Cu₅₀. It is suggested that the alloy Ti₆₀Ni₄₀ is more corrosion resistant than the alloys Ti₄₈Cu₅₂ and Ti₅₀Cu₅₀ in all the three aqueous media.

【 授权许可】

Unknown