Electrochemically-induced TiO2 incorporation for enhancing corrosion and tribocorrosion resistance of PEO coating on 7075 Al alloy

Francesco Di Franco; Monica Santamaria; Amin Hakimizad; Ehsan Akbari; Keyvan Raeissi

Electrochemically-induced TiO2 incorporation for enhancing corrosion and tribocorrosion resistance of PEO coating on 7075 Al alloy

Francesco Di Franco, Monica Santamaria, Amin Hakimizad, Ehsan Akbari, Keyvan Raeissi

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20 Citations (Scopus)

Abstract

7075 Al alloy was PEO-treated in a silicate based electrolyte containing 3 g l-1 potassium titanyl oxalate using unipolar and bipolar pulsed current waveforms. The coating formed by the bipolar waveform with the wider cathodic pulses showed volcano-like surface morphology with no evidence of large pores at the metal/coating interface. It revealed the highest corrosion performance due to the synergistic effect of TiO2 incorporation and structural/morphological features along with a better passivation behavior indicating no pitting susceptibility. For this coating, the tribocorrosion tests showed no potential drop during sliding under 1 N with the lowest volume loss of 0.022 mm3.

Original language	English
Pages (from-to)	314-328
Number of pages	15
Journal	Corrosion Science
Volume	143
Publication status	Published - 2018

All Science Journal Classification (ASJC) codes

General Chemistry
General Chemical Engineering
General Materials Science

Cite this

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title = "Electrochemically-induced TiO2 incorporation for enhancing corrosion and tribocorrosion resistance of PEO coating on 7075 Al alloy",

abstract = "7075 Al alloy was PEO-treated in a silicate based electrolyte containing 3 g l-1 potassium titanyl oxalate using unipolar and bipolar pulsed current waveforms. The coating formed by the bipolar waveform with the wider cathodic pulses showed volcano-like surface morphology with no evidence of large pores at the metal/coating interface. It revealed the highest corrosion performance due to the synergistic effect of TiO2 incorporation and structural/morphological features along with a better passivation behavior indicating no pitting susceptibility. For this coating, the tribocorrosion tests showed no potential drop during sliding under 1 N with the lowest volume loss of 0.022 mm3.",

keywords = "A. aluminium, B. EIS, B. SEM, B. polarization, C. anodic films, C. oxide coatings, Chemical Engineering (all), Chemistry (all), Materials Science (all), A. aluminium, B. EIS, B. SEM, B. polarization, C. anodic films, C. oxide coatings, Chemical Engineering (all), Chemistry (all), Materials Science (all)",

author = "{Di Franco}, Francesco and Monica Santamaria and Amin Hakimizad and Ehsan Akbari and Keyvan Raeissi",

year = "2018",

language = "English",

volume = "143",

pages = "314--328",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Limited",

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TY - JOUR

T1 - Electrochemically-induced TiO2 incorporation for enhancing corrosion and tribocorrosion resistance of PEO coating on 7075 Al alloy

AU - Di Franco, Francesco

AU - Santamaria, Monica

AU - Hakimizad, Amin

AU - Akbari, Ehsan

AU - Raeissi, Keyvan

PY - 2018

Y1 - 2018

N2 - 7075 Al alloy was PEO-treated in a silicate based electrolyte containing 3 g l-1 potassium titanyl oxalate using unipolar and bipolar pulsed current waveforms. The coating formed by the bipolar waveform with the wider cathodic pulses showed volcano-like surface morphology with no evidence of large pores at the metal/coating interface. It revealed the highest corrosion performance due to the synergistic effect of TiO2 incorporation and structural/morphological features along with a better passivation behavior indicating no pitting susceptibility. For this coating, the tribocorrosion tests showed no potential drop during sliding under 1 N with the lowest volume loss of 0.022 mm3.

AB - 7075 Al alloy was PEO-treated in a silicate based electrolyte containing 3 g l-1 potassium titanyl oxalate using unipolar and bipolar pulsed current waveforms. The coating formed by the bipolar waveform with the wider cathodic pulses showed volcano-like surface morphology with no evidence of large pores at the metal/coating interface. It revealed the highest corrosion performance due to the synergistic effect of TiO2 incorporation and structural/morphological features along with a better passivation behavior indicating no pitting susceptibility. For this coating, the tribocorrosion tests showed no potential drop during sliding under 1 N with the lowest volume loss of 0.022 mm3.

KW - A. aluminium

KW - B. EIS

KW - B. SEM

KW - B. polarization

KW - C. anodic films

KW - C. oxide coatings

KW - Chemical Engineering (all)

KW - Chemistry (all)

KW - Materials Science (all)

KW - A. aluminium

KW - B. EIS

KW - B. SEM

KW - B. polarization

KW - C. anodic films

KW - C. oxide coatings

KW - Chemical Engineering (all)

KW - Chemistry (all)

KW - Materials Science (all)

UR - http://hdl.handle.net/10447/339544

M3 - Article

VL - 143

SP - 314

EP - 328

JO - Corrosion Science

JF - Corrosion Science

SN - 0010-938X

ER -

Electrochemically-induced TiO2 incorporation for enhancing corrosion and tribocorrosion resistance of PEO coating on 7075 Al alloy

Abstract

All Science Journal Classification (ASJC) codes

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