On the Microstructural and Electrochemical Nature of Hydrothermally Treated Al-Zr and Al-Ti Surfaces

Juan Tan; Marco Crosio; Nadja Vinkel; Peter Jensen; Shoshan Tamar Abrahami; Chakravarthy G V; Rajan Ambat

doi:10.1016/J.CORSCI.2019.108244

On the Microstructural and Electrochemical Nature of Hydrothermally Treated Al-Zr and Al-Ti Surfaces

Juan Tan, Marco Crosio, Nadja Vinkel, Peter Jensen, Shoshan Tamar Abrahami, Chakravarthy G V, Rajan Ambat

Materials Engineering

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Abstract

Hydrothermal treatment of sputtered Al-Zr and Al-Ti coatings was performed in an autoclave. Electron microscopy of generated conversion layers revealed dual layered boehmite films. Needle morphology at top, and thin compact oxide at interface with metal substrate was observed. X-ray Energy Dispersive, and photoelectron spectroscopy revealed enrichment of Zr or Ti in compact oxide, and oxidation of Zr, Ti and Al. Potentiodynamic polarisation showed decrease in passive current densities due to treatment. Treated Zr containing surfaces showed lower corrosion current density when compared to those containing Ti. The observed electrochemical properties are correlated with microstructure and composition of conversion layers.

Original language	English
Journal	Corrosion Science
Early online date	27 Sept 2019
DOIs	https://doi.org/10.1016/J.CORSCI.2019.108244
Publication status	Published - 2019

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10.1016/J.CORSCI.2019.108244

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title = "On the Microstructural and Electrochemical Nature of Hydrothermally Treated Al-Zr and Al-Ti Surfaces",

abstract = "Hydrothermal treatment of sputtered Al-Zr and Al-Ti coatings was performed in an autoclave. Electron microscopy of generated conversion layers revealed dual layered boehmite films. Needle morphology at top, and thin compact oxide at interface with metal substrate was observed. X-ray Energy Dispersive, and photoelectron spectroscopy revealed enrichment of Zr or Ti in compact oxide, and oxidation of Zr, Ti and Al. Potentiodynamic polarisation showed decrease in passive current densities due to treatment. Treated Zr containing surfaces showed lower corrosion current density when compared to those containing Ti. The observed electrochemical properties are correlated with microstructure and composition of conversion layers.",

author = "Juan Tan and Marco Crosio and Nadja Vinkel and Peter Jensen and Abrahami, {Shoshan Tamar} and {G V}, Chakravarthy and Rajan Ambat",

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language = "English",

journal = "Corrosion Science",

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T1 - On the Microstructural and Electrochemical Nature of Hydrothermally Treated Al-Zr and Al-Ti Surfaces

AU - Tan, Juan

AU - Crosio, Marco

AU - Vinkel, Nadja

AU - Jensen, Peter

AU - Abrahami, Shoshan Tamar

AU - G V, Chakravarthy

AU - Ambat, Rajan

PY - 2019

Y1 - 2019

N2 - Hydrothermal treatment of sputtered Al-Zr and Al-Ti coatings was performed in an autoclave. Electron microscopy of generated conversion layers revealed dual layered boehmite films. Needle morphology at top, and thin compact oxide at interface with metal substrate was observed. X-ray Energy Dispersive, and photoelectron spectroscopy revealed enrichment of Zr or Ti in compact oxide, and oxidation of Zr, Ti and Al. Potentiodynamic polarisation showed decrease in passive current densities due to treatment. Treated Zr containing surfaces showed lower corrosion current density when compared to those containing Ti. The observed electrochemical properties are correlated with microstructure and composition of conversion layers.

AB - Hydrothermal treatment of sputtered Al-Zr and Al-Ti coatings was performed in an autoclave. Electron microscopy of generated conversion layers revealed dual layered boehmite films. Needle morphology at top, and thin compact oxide at interface with metal substrate was observed. X-ray Energy Dispersive, and photoelectron spectroscopy revealed enrichment of Zr or Ti in compact oxide, and oxidation of Zr, Ti and Al. Potentiodynamic polarisation showed decrease in passive current densities due to treatment. Treated Zr containing surfaces showed lower corrosion current density when compared to those containing Ti. The observed electrochemical properties are correlated with microstructure and composition of conversion layers.

U2 - 10.1016/J.CORSCI.2019.108244

DO - 10.1016/J.CORSCI.2019.108244

M3 - Article

SN - 0010-938X

JO - Corrosion Science

JF - Corrosion Science

ER -

On the Microstructural and Electrochemical Nature of Hydrothermally Treated Al-Zr and Al-Ti Surfaces

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