Effect of Zn addition on corrosion resistance of Cu-10Ni alloy in clean and sulphide contaminated seawater

Vipin Tandon; Awanikumar P. Patil; Ankur Bansod

doi:10.1080/00084433.2017.1403073

Effect of Zn addition on corrosion resistance of Cu-10Ni alloy in clean and sulphide contaminated seawater

Vipin Tandon^*
, Awanikumar P. Patil
, Ankur Bansod

^*Corresponding author for this work

Manipal School of Architecture and Planning, Manipal

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

3 Citations (Scopus)

Abstract

Cu-10Ni alloy has an outstanding resistance to corrosion in seawater due to formation of protective Cu₂O film. However, in presence of S²⁻ ions, it suffers accelerated corrosion. The present paper investigates the corrosion behaviour of Cu-10Ni, Cu-10Ni-6Zn and Cu-10Ni-12Zn alloys using weight loss, electrochemical impedance spectroscopy and potentiodynamic polarisation technique. The experiments were performed in clean seawater and sulphide contaminated seawater. The Cu-10Ni-6Zn and Cu-10Ni-12Zn alloys were found to exhibit lower corrosion rate than Cu-10Ni alloy in clean and sulphide contaminated seawater. Lower corrosion rate of Zn containing alloys in clean seawater is attributed to the incorporation of Zn²⁺ ions in Cu₂O lattice. Lower corrosion rate of Zn containing alloys sulphide contaminated seawater is attributed to formation of ZnS in the film.

Original language	English
Pages (from-to)	194-200
Number of pages	7
Journal	Canadian Metallurgical Quarterly
Volume	57
Issue number	2
DOIs	https://doi.org/10.1080/00084433.2017.1403073
Publication status	Published - 03-04-2018

All Science Journal Classification (ASJC) codes

Metals and Alloys
Industrial and Manufacturing Engineering

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10.1080/00084433.2017.1403073

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title = "Effect of Zn addition on corrosion resistance of Cu-10Ni alloy in clean and sulphide contaminated seawater",

abstract = "Cu-10Ni alloy has an outstanding resistance to corrosion in seawater due to formation of protective Cu2O film. However, in presence of S2− ions, it suffers accelerated corrosion. The present paper investigates the corrosion behaviour of Cu-10Ni, Cu-10Ni-6Zn and Cu-10Ni-12Zn alloys using weight loss, electrochemical impedance spectroscopy and potentiodynamic polarisation technique. The experiments were performed in clean seawater and sulphide contaminated seawater. The Cu-10Ni-6Zn and Cu-10Ni-12Zn alloys were found to exhibit lower corrosion rate than Cu-10Ni alloy in clean and sulphide contaminated seawater. Lower corrosion rate of Zn containing alloys in clean seawater is attributed to the incorporation of Zn2+ ions in Cu2O lattice. Lower corrosion rate of Zn containing alloys sulphide contaminated seawater is attributed to formation of ZnS in the film.",

author = "Vipin Tandon and Patil, \{Awanikumar P.\} and Ankur Bansod",

note = "Publisher Copyright: {\textcopyright} 2017 Canadian Institute of Mining, Metallurgy and Petroleum.",

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AU - Tandon, Vipin

AU - Patil, Awanikumar P.

AU - Bansod, Ankur

PY - 2018/4/3

Y1 - 2018/4/3

N2 - Cu-10Ni alloy has an outstanding resistance to corrosion in seawater due to formation of protective Cu2O film. However, in presence of S2− ions, it suffers accelerated corrosion. The present paper investigates the corrosion behaviour of Cu-10Ni, Cu-10Ni-6Zn and Cu-10Ni-12Zn alloys using weight loss, electrochemical impedance spectroscopy and potentiodynamic polarisation technique. The experiments were performed in clean seawater and sulphide contaminated seawater. The Cu-10Ni-6Zn and Cu-10Ni-12Zn alloys were found to exhibit lower corrosion rate than Cu-10Ni alloy in clean and sulphide contaminated seawater. Lower corrosion rate of Zn containing alloys in clean seawater is attributed to the incorporation of Zn2+ ions in Cu2O lattice. Lower corrosion rate of Zn containing alloys sulphide contaminated seawater is attributed to formation of ZnS in the film.

AB - Cu-10Ni alloy has an outstanding resistance to corrosion in seawater due to formation of protective Cu2O film. However, in presence of S2− ions, it suffers accelerated corrosion. The present paper investigates the corrosion behaviour of Cu-10Ni, Cu-10Ni-6Zn and Cu-10Ni-12Zn alloys using weight loss, electrochemical impedance spectroscopy and potentiodynamic polarisation technique. The experiments were performed in clean seawater and sulphide contaminated seawater. The Cu-10Ni-6Zn and Cu-10Ni-12Zn alloys were found to exhibit lower corrosion rate than Cu-10Ni alloy in clean and sulphide contaminated seawater. Lower corrosion rate of Zn containing alloys in clean seawater is attributed to the incorporation of Zn2+ ions in Cu2O lattice. Lower corrosion rate of Zn containing alloys sulphide contaminated seawater is attributed to formation of ZnS in the film.

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Effect of Zn addition on corrosion resistance of Cu-10Ni alloy in clean and sulphide contaminated seawater

Abstract

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