Corrosion protection of AA2024-T3 using rare earth diphenyl phosphates

Tracey Anne Markley; Maria Forsyth; Anthony E Hughes

doi:10.1016/j.electacta.2006.11.028

Corrosion protection of AA2024-T3 using rare earth diphenyl phosphates

Tracey Anne Markley, Maria Forsyth, Anthony E Hughes

Materials Science & Engineering

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

113 Citations (Scopus)

Abstract

Existing corrosion protection technologies for aluminium alloys utilising chromates are environmentally damaging and extremely toxic. This paper presents a preliminary investigation into rare earth diphenyl phosphates as new environmentally benign corrosion inhibitors. Full immersion weight loss experiments, cyclic potentiodynamic polarisation measurements and Raman spectroscopy were used in this study. Results show cerium diphenyl phosphate (Ce(dpp)(3)) acts as a cathodic inhibitor, decreasing cathodic current density and E-corr by passivating cathodic intermetallic particles on the alloy surface. Mischmetal diphenyl phosphate (Mm(dpp)(3)) acts a mixed inhibitor, shifting E-corr to more noble values, decreasing cathodic current density, increasing the breakdown potential and suppressing pitting. (c) 2006 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	4024 - 4031
Number of pages	8
Journal	Electrochimica Acta
Volume	52
Issue number	12
DOIs	https://doi.org/10.1016/j.electacta.2006.11.028
Publication status	Published - 2007

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10.1016/j.electacta.2006.11.028

Cite this

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title = "Corrosion protection of AA2024-T3 using rare earth diphenyl phosphates",

abstract = "Existing corrosion protection technologies for aluminium alloys utilising chromates are environmentally damaging and extremely toxic. This paper presents a preliminary investigation into rare earth diphenyl phosphates as new environmentally benign corrosion inhibitors. Full immersion weight loss experiments, cyclic potentiodynamic polarisation measurements and Raman spectroscopy were used in this study. Results show cerium diphenyl phosphate (Ce(dpp)(3)) acts as a cathodic inhibitor, decreasing cathodic current density and E-corr by passivating cathodic intermetallic particles on the alloy surface. Mischmetal diphenyl phosphate (Mm(dpp)(3)) acts a mixed inhibitor, shifting E-corr to more noble values, decreasing cathodic current density, increasing the breakdown potential and suppressing pitting. (c) 2006 Elsevier Ltd. All rights reserved.",

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AU - Markley, Tracey Anne

AU - Forsyth, Maria

AU - Hughes, Anthony E

PY - 2007

Y1 - 2007

N2 - Existing corrosion protection technologies for aluminium alloys utilising chromates are environmentally damaging and extremely toxic. This paper presents a preliminary investigation into rare earth diphenyl phosphates as new environmentally benign corrosion inhibitors. Full immersion weight loss experiments, cyclic potentiodynamic polarisation measurements and Raman spectroscopy were used in this study. Results show cerium diphenyl phosphate (Ce(dpp)(3)) acts as a cathodic inhibitor, decreasing cathodic current density and E-corr by passivating cathodic intermetallic particles on the alloy surface. Mischmetal diphenyl phosphate (Mm(dpp)(3)) acts a mixed inhibitor, shifting E-corr to more noble values, decreasing cathodic current density, increasing the breakdown potential and suppressing pitting. (c) 2006 Elsevier Ltd. All rights reserved.

AB - Existing corrosion protection technologies for aluminium alloys utilising chromates are environmentally damaging and extremely toxic. This paper presents a preliminary investigation into rare earth diphenyl phosphates as new environmentally benign corrosion inhibitors. Full immersion weight loss experiments, cyclic potentiodynamic polarisation measurements and Raman spectroscopy were used in this study. Results show cerium diphenyl phosphate (Ce(dpp)(3)) acts as a cathodic inhibitor, decreasing cathodic current density and E-corr by passivating cathodic intermetallic particles on the alloy surface. Mischmetal diphenyl phosphate (Mm(dpp)(3)) acts a mixed inhibitor, shifting E-corr to more noble values, decreasing cathodic current density, increasing the breakdown potential and suppressing pitting. (c) 2006 Elsevier Ltd. All rights reserved.

U2 - 10.1016/j.electacta.2006.11.028

DO - 10.1016/j.electacta.2006.11.028

M3 - Article

SN - 0013-4686

VL - 52

SP - 4024

EP - 4031

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 12

ER -