Dual-Function Hybrid Coatings Based on Polytetrafluoroethylene and Cu2O for Anti-Biocorrosion and Anti-Wear Applications

Corrosion and wear issues of motion components exposed to water-based corrosion mediums, e.g., naval vessels and oil extraction equipment, pose challenges for the lifespan and reliability of the motion systems. In this work, epoxy-based coatings modified with polytetrafluoroethylene (PTFE) and cupro...

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Veröffentlicht in:Coatings (Basel) 2024-05, Vol.14 (5), p.592
Hauptverfasser: Li, Guohui, Li, Huan, Xu, Yongkun, He, Ren, Zhang, Ga, Liu, Zongzhu
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creator Li, Guohui
Li, Huan
Xu, Yongkun
He, Ren
Zhang, Ga
Liu, Zongzhu
description Corrosion and wear issues of motion components exposed to water-based corrosion mediums, e.g., naval vessels and oil extraction equipment, pose challenges for the lifespan and reliability of the motion systems. In this work, epoxy-based coatings modified with polytetrafluoroethylene (PTFE) and cuprous oxide (Cu2O) nanoparticles were prepared. The anti-corrosion performance of the coatings was comparatively investigated by electrical impedance spectroscopy and Tafel tests in sterile and sulphate-reducing bacteria (SRB) mediums. Moreover, the tribological behaviors of the coatings were examined under water lubrication conditions. Our results demonstrate that the epoxy coatings lower significantly the corrosion current density icorr and the charge transfer resistance of the electrical double layer Rct of the carbon steel substrate. Interestingly, the hybrid coatings filled with both PTFE and Cu2O exhibit excellent anti-corrosion and anti-wear performance. After being immersed in the SRB medium for 18 days, the icorr of the pure EP coating and hybrid coatings are 1.10 × 10−7 Amp/cm2 and 0.3 × 10−7 Amp/cm2, and the Rct values are 1.04 × 103 Ω·cm2 and 3.87 × 103 Ω·cm2, respectively. A solid tribofilm forms on the stainless steel counterface sliding against the hybrid coating, which is surmised to be essential for the low friction coefficients and wear. The present work paves a route for formulating the dual-function coatings of anti-biocorrosion and anti-wear.
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A solid tribofilm forms on the stainless steel counterface sliding against the hybrid coating, which is surmised to be essential for the low friction coefficients and wear. 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subjects Bacteria
Bacterial corrosion
Biofilms
Carbon steel
Carbon steels
Cathodic protection
Charge transfer
Coefficient of friction
Copper oxides
Corrosion
Corrosion currents
Corrosion prevention
Corrosion resistance
Corrosive wear
Electrical impedance
Electrodes
Epoxy coatings
Epoxy resins
Investigations
Microorganisms
Motion systems
Nanoparticles
Naval vessels
Polymers
Polytetrafluoroethylene
Protective coatings
Stainless steels
Substrates
Sulfate reduction
Tribology
Wear resistance
title Dual-Function Hybrid Coatings Based on Polytetrafluoroethylene and Cu2O for Anti-Biocorrosion and Anti-Wear Applications
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