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

Mxolisi Brendon Shongwe; Isaac Moraka Makena; Olawale Olarewaju Ajibola; Peter Apata Olubambi; Feyisayo Victoria Adams

doi:10.4314/bcse.v32i2.12

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

Mxolisi Brendon Shongwe, Isaac Moraka Makena, Olawale Olarewaju Ajibola, Peter Apata Olubambi, Feyisayo Victoria Adams

Metallurgy

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	337-349
Number of pages	13
Journal	Bulletin of the Chemical Society of Ethiopia
Volume	32
Issue number	2
DOIs	https://doi.org/10.4314/bcse.v32i2.12
Publication status	Published - 2018

Keywords

Corrosion
Ni-Fe based alloy
Powder metallurgy
Spark plasma sintering
Ternary alloys

ASJC Scopus subject areas

General Chemistry

Access to Document

10.4314/bcse.v32i2.12

Cite this

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

abstract = "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.",

keywords = "Corrosion, Ni-Fe based alloy, Powder metallurgy, Spark plasma sintering, Ternary alloys",

author = "Shongwe, {Mxolisi Brendon} and Makena, {Isaac Moraka} and Ajibola, {Olawale Olarewaju} and Olubambi, {Peter Apata} and Adams, {Feyisayo Victoria}",

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AU - Shongwe, Mxolisi Brendon

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AU - Ajibola, Olawale Olarewaju

AU - Olubambi, Peter Apata

AU - Adams, Feyisayo Victoria

PY - 2018

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N2 - 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.

AB - 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.

KW - Corrosion

KW - Ni-Fe based alloy

KW - Powder metallurgy

KW - Spark plasma sintering

KW - Ternary alloys

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