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Meeting 2019 TMS Annual Meeting & Exhibition
Symposium Coatings and Surface Engineering for Environmental Protection
Presentation Title C-7: Mechanistic Understanding of Corrosion-inhibition in Graphene/Polyetherimide Nanocomposites: From Tortuosity to Galvanic Corrosion
Author(s) Rachel D. Davidson, Sarbajit Banerjee
On-Site Speaker (Planned) Rachel D. Davidson
Abstract Scope Transitioning to aluminum-based automotive components is imperative to meet the increasingly stringent weight targets required to reduce fuel consumption in the automotive industry. Chromium-based coatings provide excellent corrosion protection of high-strength aluminum alloys, but are carcinogenic and toxic to the environment. There is thus a strong unmet need for sustainable technologies that can provide long-term corrosion protection of engineered aluminum alloys. In this work, we develop mechanistic understanding of the corrosion inhibition endowed by polyetherimide/graphene coatings with varying graphene content. Graphene/polyamic acid coatings are formed by in situ condensation of aromatic dianhydrides with diamines followed by imidization on the substrate to obtain the graphene/polyetherimide nanocomposite. At low loadings, we demonstrate excellent long-term corrosion inhibition derived from well-dispersed graphene inclusions that provide extended tortuous pathways for the diffusion of corrosive species. However, higher graphene loadings result in formation of a percolative network, which brings about accelerated galvanic corrosion.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

C-10: The Effects of Addition of TiO2 Nanoparticles on the Corrosion and Tribological Performance of the Thermally Spared Aluminum Coatings
C-11: The Effect of α-αʹ Phase Separation due to Thermal Aging on Corrosion Behavior of Duplex Stainless Steels
C-12: Towards Novel Structural Material Candidates for Application in Liquid Metals: A Behavior of Nb, Ti-V and Fe-Cr-Al Alloys in Pb and Pb-Bi Eutectic
C-2: A Study of Cl Adsorption on Hydroxylated Cr2O3 Passive Film Using Density Functional Theory(DFT)
C-3: Ceramic Materials as Corrosion Protective Agents for Urethanic Films on Steel ABNT 1020 Fosphotated
C-4: Corrosion Behavior of Aluminum Alloy AA7075 Cold Sprayed Coatings
C-5: Localized Corrosion Behaviour of AA7150 after Ultrasonic Shot Peening: Corrosion Depth vs. Impact Energy
C-6: Mechanisms of Oxidation of Pure and Si-segregated α-Ti Surfaces
C-7: Mechanistic Understanding of Corrosion-inhibition in Graphene/Polyetherimide Nanocomposites: From Tortuosity to Galvanic Corrosion
C-8: Salt Test Methods and Controls as a Study of Corrosion in Polluted Areas
C-9: Study of Mechanisms of Cobalt Electrodeposition by Means of Potentiodynamic Polarization Curves
Characterizing High-temperature Asphaltene Fouling and Corrosion of Ferrous Alloys
Coating Performance and Atmospheric Corrosion Measurements
Comparing the Corrosion Resistance Imparted by a Polyetherimide Coating on Magnesium and Steel
Corrosion Performance of Polymer Nanocomposite Coatings on Aluminum Alloy in Saline Environment
Corrosion Phenomena in Powder-processed Icosahedral-phase-strengthened Aluminum Alloys
Corrosion Properties of Steel Sheet with Zinc-base Alloyed Coatings
Corrosion Study of Cu-Ag Alloy in the Presence of Benzotriazole Inhibitor
Corrosion Test Methods for New Materials and Mixed Material Assemblies
Design and Performance of REACH-compliant Coating Systems for Aerospace Applications
Diamond-like Carbon Coating for Drill Collars – Test Experiences
Effect and Role of Alloyed Nb on the Air Oxidation Behaviour of Ni-Cr-Fe Alloys at 1000 C
Effect of Aluminizing on Cyclic Oxidation Behavior of 304H Stainless Steel at 650oC in Dry/Wet Air
Effect of Nickel Content on Mechanical Property and Corrosion Behaviour of Nickel-aluminium Bronze
Fabrication and Characterization of Cold Sprayed Coating for Highly Corrosive High Temperature Conditions
Improvement of the High Temperature Oxidation Behavior of Ni-alloys by a Combined Al- Plus F-treatment
Influence of Aluminum Concentration in Zinc Bath on Galvanizing Behavior of a Dual Phase High Strength Steel
Investigating the Electrical Restance (ER) Technique for In-situ Structural Alloy Corrosion Monitoring within Supercritical CO2 Power Cycles
Investigation of Self-healing Properties of Cerium-based Conversion Coatings on Mg Alloys
New Accelerated Corrosion Test Methods for Atmospheric Corrosion on Aluminum Aircraft
Novel Amorphous Thermal Sprayed Coatings
Protective Coating for Nuclear Fuel Claddings
Recent Innovations in Electrodeposited Coatings
Seawater Corrosion Results for 11 Alloys Tested at the TAMUG Boat Basin Site

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