Effects of ternary metal additions on corrosion of spark plasma sintered Ni-Fe alloys in H2SO4 and NaCl

Bulletin of The Chemical Society of Ethiopia

M. B. Shongwe¹ 

关键词: Spark plasma sintering;    Corrosion;    Ni-Fe based alloy;    Ternary alloys;    Powder metallurgy;   

DOI  :  10.4314/bcse.v32i2.12

学科分类：化学（综合）

来源: Chemical Society of Ethiopia

【 摘 要 】

Effect of ternary additions on electrochemical behavior of Ni-Fe binary alloys developed by Spark Plasma Sintering (SPS) were investigated and reported. All specimens revealed common passivity behavior in H₂SO₄. Both binary and ternary alloys did not reveal passivity region under saline conditions. The alloys have lower corrosion rates in NaCl than in H₂SO₄. Binary Ni₅₀Fe₅₀ alloy is characterized by large pits in H₂SO₄ and homogeneous corrosion on surface in NaCl. Ni₅₀Fe₄₀Ta₁₀ shows better passivity in 1 M H₂SO₄ and Ni₅₀Fe₄₀Al₁₀ has the lowest corrosion rate in 3.5 wt.% NaCl.

【 授权许可】

Unknown