Corrosion-resistant polymer coatings containing rare earth compounds

O’Keefe, Matthew J.; Fahrenholtz, William G.; Stoffer, James O.; Morris, Eric

doi:10.1533/9780857093585.163

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…In general, the literature agrees that rare earths behave as cathodic corrosion inhibitors for many metal alloys when added to a corrosive electrolyte (de Damborenea et al, 2014;Hughes et al, 2014;O'Keefe et al, 2014;Yasakau et al, 2014). In particular, the process of inhibiting corrosion through the lanthanide salts for various materials is a consequence of the inhibition of cathodic regions by the precipitation of an oxide/ hydroxide film.…”

Section: Electrochemical Studiesmentioning

confidence: 92%

Assessment of Self-Healing Epoxy-Based Coatings Containing Microcapsules Applied on Hot Dipped Galvanized Steel

2019

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This study focuses on the design, development, and validation of two coating systems for corrosion protection of hot dip galvanized steel substrates. The coatings consist of epoxy-based resin reinforced with core-shell microcapsules, either cerium oxide or cuprous oxide core and a polymeric shell doped with cerium ions. The effect of the modification of the epoxy resin with a liquid rubber polymer has also been studied. Corrosion studies via electrochemical impedance spectroscopy (EIS) revealed that the coatings have enhanced barrier properties. Moreover, EIS studies on coatings with artificial scribes, demonstrated an autonomous response to damage and a selfhealing effect. Heat-induced material re-flow has also been observed after exposure to temperature higher than the T g of the system, which offered an additional self-healing mechanism, partially inhibiting the underlying corrosion processes when the liquid rubber is present in the system.

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Section: Electrochemical Studiesmentioning

confidence: 92%

Assessment of Self-Healing Epoxy-Based Coatings Containing Microcapsules Applied on Hot Dipped Galvanized Steel

2019

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“…An epoxy primer containing praseodymium (Pr) pigment (02GN084, MIL-PRF-23377J Type I, Class N coating) was applied directly on the bare AA7075-T6 panel without any surface pretreatment. Pr oxide is soluble in the primer matrix, and Pr-rich species can transport to the active corrosion sites and reprecipitate [11]. Two 'X'-shaped scribes through the coating to the Al alloy substrate were created manually across the bottom of two fastener holes before the fasteners were installed.…”

Section: Corrosion Testsmentioning

confidence: 99%

Fundamental study of corrosion-preventive compounds: part III—soft films

Wang

Frankel

2020

Corrosion Engineering, Science and Technology

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Soft film corrosion-preventive compounds (CPC) were studied using ASTM B117 accelerated corrosion testing method and a special test specimen. The tested CPCs included a commercial product and homemade CPCs with a generic formulation containing paraffin wax, petrolatum, corrosion inhibitors and surfactants. Carbon steel substrates coated with CPCs containing corrosion inhibitors and surfactants showed little corrosion after 21 days of exposure in an ASTM B117 chamber. However, the carbon steel substrates coated with CPCs containing no inhibitors or surfactants showed severe corrosion after 7 days of exposure. The effect of CPCs on galvanic corrosion prevention was studied using a special test specimen configuration consisting of a primer-coated AA7075-T6 panel coupled with SS316 fasteners. The galvanic currents between the panel and fastener were measured using a zero-resistance ammeter during exposure of the test specimen in the ASTM B117 chamber. The galvanic attack of the panels coated with different CPCs was evaluated.

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“…They showed that these materials are proper substitutes for conventional anticorrosion materials. O'Keefe et al 20 studied the importance of using the rare-earth materials in the organic paints as corrosion inhibitors. They reported the use of cerium salts in an electrolytically deposited coating on the corrosion protection of metals.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical investigation of the epoxy nanocomposites containing MnAl2O4 and CoAl2O4 nanopigments applied on the aluminum alloy 1050

et al. 2015

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The MnAl 2 O 4 and CoAl 2 O 4 nanopigments were synthesized through solution combustion method. The nanopigments extracts in the 3.5 wt% NaCl solution were prepared. Electrochemical impedance spectroscopy (EIS) and linear polarization (LP) techniques were utilized to investigate the corrosion inhibition properties of the pigments in the solutions containing pigments extracts. The epoxy nanocomposites were prepared and applied on the aluminum specimens. EIS and pull-off measurements were performed to characterize the corrosion protection properties of the epoxy nanocomposites. It was revealed that the MnAl 2 O 4 pigment showed higher corrosion inhibition properties than CoAl 2 O 4 in the solution phase. In addition, MnAl 2 O 4 enhanced the corrosion resistance and decreased the adhesion loss of the epoxy coating on the aluminum substrate significantly. The MnAl 2 O 4 nanopigment improved the corrosion resistance of the epoxy coating through increasing the barrier performance and releasing inhibitive species.

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Corrosion-resistant polymer coatings containing rare earth compounds

Cited by 7 publications

References 11 publications

Assessment of Self-Healing Epoxy-Based Coatings Containing Microcapsules Applied on Hot Dipped Galvanized Steel

Assessment of Self-Healing Epoxy-Based Coatings Containing Microcapsules Applied on Hot Dipped Galvanized Steel

Fundamental study of corrosion-preventive compounds: part III—soft films

Electrochemical investigation of the epoxy nanocomposites containing MnAl2O4 and CoAl2O4 nanopigments applied on the aluminum alloy 1050

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