Inhibition of AA2024-T3 on a phase-by-phase basis using an environmentally benign inhibitor, cerium dibutyl phosphate

N. Birbilis; R. G. Buchheit; D. L. Ho; M. Forsyth

doi:10.1149/1.2073672

Inhibition of AA2024-T3 on a phase-by-phase basis using an environmentally benign inhibitor, cerium dibutyl phosphate

N. Birbilis, R. G. Buchheit, D. L. Ho, M. Forsyth

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Abstract

Inhibition of anodic and cathodic reactions on intermetallic compounds in aluminum alloy 2024-T3 (Al-4.4Cu-1.5Mg-0.6Mn) by cerium dibutyl phosphate [Ce(dbp)₃] additions to dilute chloride solutions was studied using a microelectrochemical cell approach. Cathodic polarization curves were measured on Al₂Cu, Al₇Cu₂Fe, Al₂₀Cu ₂Mn₃, and Al₃Fe. Results showed the Ce(dbp)₃ effectively inhibits oxygen reduction on each phase. Anodic polarization curves were measured for Al₇Cu₂Fe and Al ₂CuMg compounds. Results showed that Ce(dpb)₃ additions stabilized passivity of these phases. This work suggests that Ce(dbp) ₃ may effectively inhibit localized corrosion owing to its mixed nature, providing retardation of the oxygen reduction reaction upon noble intermetallics and concomitant retardation of dissolution of phases that may be prone to attack.

Original language	English
Pages (from-to)	C180-C183
Journal	Electrochemical and Solid-State Letters
Volume	8
Issue number	11
DOIs	https://doi.org/10.1149/1.2073672
State	Published - 2005

ASJC Scopus subject areas

General Chemical Engineering
General Materials Science
Physical and Theoretical Chemistry
Electrochemistry
Electrical and Electronic Engineering

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abstract = "Inhibition of anodic and cathodic reactions on intermetallic compounds in aluminum alloy 2024-T3 (Al-4.4Cu-1.5Mg-0.6Mn) by cerium dibutyl phosphate [Ce(dbp)3] additions to dilute chloride solutions was studied using a microelectrochemical cell approach. Cathodic polarization curves were measured on Al2Cu, Al7Cu2Fe, Al20Cu 2Mn3, and Al3Fe. Results showed the Ce(dbp)3 effectively inhibits oxygen reduction on each phase. Anodic polarization curves were measured for Al7Cu2Fe and Al 2CuMg compounds. Results showed that Ce(dpb)3 additions stabilized passivity of these phases. This work suggests that Ce(dbp) 3 may effectively inhibit localized corrosion owing to its mixed nature, providing retardation of the oxygen reduction reaction upon noble intermetallics and concomitant retardation of dissolution of phases that may be prone to attack.",

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T1 - Inhibition of AA2024-T3 on a phase-by-phase basis using an environmentally benign inhibitor, cerium dibutyl phosphate

AU - Birbilis, N.

AU - Buchheit, R. G.

AU - Ho, D. L.

AU - Forsyth, M.

PY - 2005

Y1 - 2005

N2 - Inhibition of anodic and cathodic reactions on intermetallic compounds in aluminum alloy 2024-T3 (Al-4.4Cu-1.5Mg-0.6Mn) by cerium dibutyl phosphate [Ce(dbp)3] additions to dilute chloride solutions was studied using a microelectrochemical cell approach. Cathodic polarization curves were measured on Al2Cu, Al7Cu2Fe, Al20Cu 2Mn3, and Al3Fe. Results showed the Ce(dbp)3 effectively inhibits oxygen reduction on each phase. Anodic polarization curves were measured for Al7Cu2Fe and Al 2CuMg compounds. Results showed that Ce(dpb)3 additions stabilized passivity of these phases. This work suggests that Ce(dbp) 3 may effectively inhibit localized corrosion owing to its mixed nature, providing retardation of the oxygen reduction reaction upon noble intermetallics and concomitant retardation of dissolution of phases that may be prone to attack.

AB - Inhibition of anodic and cathodic reactions on intermetallic compounds in aluminum alloy 2024-T3 (Al-4.4Cu-1.5Mg-0.6Mn) by cerium dibutyl phosphate [Ce(dbp)3] additions to dilute chloride solutions was studied using a microelectrochemical cell approach. Cathodic polarization curves were measured on Al2Cu, Al7Cu2Fe, Al20Cu 2Mn3, and Al3Fe. Results showed the Ce(dbp)3 effectively inhibits oxygen reduction on each phase. Anodic polarization curves were measured for Al7Cu2Fe and Al 2CuMg compounds. Results showed that Ce(dpb)3 additions stabilized passivity of these phases. This work suggests that Ce(dbp) 3 may effectively inhibit localized corrosion owing to its mixed nature, providing retardation of the oxygen reduction reaction upon noble intermetallics and concomitant retardation of dissolution of phases that may be prone to attack.

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Inhibition of AA2024-T3 on a phase-by-phase basis using an environmentally benign inhibitor, cerium dibutyl phosphate

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