Online from: 1954
Subject Area: Mechanical & Materials Engineering
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|Title:||The role of iron content on the corrosion behavior of 90Cu-10Ni alloys in 3.5% NaCl solutions|
|Author(s):||Hosni M. Zubeir, (College of Engineering, University of Bahrain, Sakheer, Bahrain)|
|Citation:||Hosni M. Zubeir, (2012) "The role of iron content on the corrosion behavior of 90Cu-10Ni alloys in 3.5% NaCl solutions", Anti-Corrosion Methods and Materials, Vol. 59 Iss: 4, pp.195 - 202|
|Keywords:||90Cu-10Ni alloys, Alloys, Corrosion, Flow, Iron, Iron content, NaCl solution|
|Article type:||Research paper|
|DOI:||10.1108/00035591211242032 (Permanent URL)|
|Publisher:||Emerald Group Publishing Limited|
Purpose – The purpose of this paper is to investigate the effect of iron content (2% and up to 6% Fe) on the corrosion behavior of 90Cu-10Ni alloys in 3.5% NaCl at different temperatures (23, 50 and 80°C) under stagnant conditions and fluid flow (with an agitation speed of 350 and 900?RPM). The laboratory study was conducted following a failure of high iron content (up to 6%) 90Cu-10Ni heat exchanger tubes in a desalination plant.
Design/methodology/approach – Potentiodynamic polarization measurement (DC) was used to estimate the corrosion rate of the 90Cu-10Ni alloys in NaCl solutions under stagnant and fluid flow conditions.
Findings – It was found that the higher iron content cupronickel material suffered higher corrosion rates in all tests. The intensity of the corrosion attack of both materials was increased significantly with increasing experimental temperature or flow velocity. The results support a previous prediction that the presence of excess iron (well above 2%) has played a major role in corrosion failure of 90Cu-10Ni heat exchanger tubing material in seawater.
Originality/value – This paper explains the role of iron content on the corrosion behavior of 90Cu-10Ni alloys in 3.5% NaCl under stagnant and fluid flow conditions.
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