Effect of temperature variation on the corrosion behaviour and semiconducting properties of the passive film formed on chromium oxide coatings exposed to saline solution

A.M. Oje; A.A. Ogwu; S. Ur Rahman; Alex I. Oje; Nathaniel Tsendzughul

doi:10.1016/j.corsci.2019.04.004

Effect of temperature variation on the corrosion behaviour and semiconducting properties of the passive film formed on chromium oxide coatings exposed to saline solution

A.M. Oje, A.A. Ogwu, S. Ur Rahman, Alex I. Oje, Nathaniel Tsendzughul

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Abstract

The corrosion behaviour of chromium oxide coatings and semiconducting properties of the passive film formed on the surface of the coated samples when exposed to saline solution at a temperature range 25 °C–65 °C was investigated. The cyclic polarisation results revealed that the coatings tested at a electrolyte temperature range 25 °C–35 °C possess superior resistance to pitting corrosion when compared to coatings tested at higher temperatures. Our Mott-Schottky analysis suggests that this variation in corrosion resistance can be linked to the increase in the amount of the defect density present in the films and enhanced diffusion at higher temperatures.

Original language	English
Pages (from-to)	28-35
Number of pages	8
Journal	Corrosion Science
Volume	154
Early online date	6 Apr 2019
DOIs	https://doi.org/10.1016/j.corsci.2019.04.004
Publication status	Published - 1 Jul 2019

Keywords

Chromium oxide coatings
Corrosion
Semiconducting properties
Elevated temperatures
Saline solution

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10.1016/j.corsci.2019.04.004

2019 04 04 Oje et al EffectAccepted author manuscript, 1.24 MBLicence: CC BY-NC-ND

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title = "Effect of temperature variation on the corrosion behaviour and semiconducting properties of the passive film formed on chromium oxide coatings exposed to saline solution",

abstract = "The corrosion behaviour of chromium oxide coatings and semiconducting properties of the passive film formed on the surface of the coated samples when exposed to saline solution at a temperature range 25 °C–65 °C was investigated. The cyclic polarisation results revealed that the coatings tested at a electrolyte temperature range 25 °C–35 °C possess superior resistance to pitting corrosion when compared to coatings tested at higher temperatures. Our Mott-Schottky analysis suggests that this variation in corrosion resistance can be linked to the increase in the amount of the defect density present in the films and enhanced diffusion at higher temperatures.",

keywords = "Chromium oxide coatings, Corrosion, Semiconducting properties, Elevated temperatures, Saline solution",

author = "A.M. Oje and A.A. Ogwu and Rahman, {S. Ur} and Oje, {Alex I.} and Nathaniel Tsendzughul",

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T1 - Effect of temperature variation on the corrosion behaviour and semiconducting properties of the passive film formed on chromium oxide coatings exposed to saline solution

AU - Oje, A.M.

AU - Ogwu, A.A.

AU - Rahman, S. Ur

AU - Oje, Alex I.

AU - Tsendzughul, Nathaniel

PY - 2019/7/1

Y1 - 2019/7/1

N2 - The corrosion behaviour of chromium oxide coatings and semiconducting properties of the passive film formed on the surface of the coated samples when exposed to saline solution at a temperature range 25 °C–65 °C was investigated. The cyclic polarisation results revealed that the coatings tested at a electrolyte temperature range 25 °C–35 °C possess superior resistance to pitting corrosion when compared to coatings tested at higher temperatures. Our Mott-Schottky analysis suggests that this variation in corrosion resistance can be linked to the increase in the amount of the defect density present in the films and enhanced diffusion at higher temperatures.

AB - The corrosion behaviour of chromium oxide coatings and semiconducting properties of the passive film formed on the surface of the coated samples when exposed to saline solution at a temperature range 25 °C–65 °C was investigated. The cyclic polarisation results revealed that the coatings tested at a electrolyte temperature range 25 °C–35 °C possess superior resistance to pitting corrosion when compared to coatings tested at higher temperatures. Our Mott-Schottky analysis suggests that this variation in corrosion resistance can be linked to the increase in the amount of the defect density present in the films and enhanced diffusion at higher temperatures.

KW - Chromium oxide coatings

KW - Corrosion

KW - Semiconducting properties

KW - Elevated temperatures

KW - Saline solution

U2 - 10.1016/j.corsci.2019.04.004

DO - 10.1016/j.corsci.2019.04.004

M3 - Article

SN - 0010-938X

VL - 154

SP - 28

EP - 35

JO - Corrosion Science

JF - Corrosion Science

ER -

Effect of temperature variation on the corrosion behaviour and semiconducting properties of the passive film formed on chromium oxide coatings exposed to saline solution

Abstract

Keywords

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