Abstract
The use of carbon nanotubes grown on carbon fiber was used in electrochemical sensing of the aluminum alloy corrosion by open circuit potential (OCP) and electrochemical impedance spectra (EIS) measurements. In 3.5 wt% NaCl solutions, CNT enhanced the conductivity of the carbon fiber. After sputtering of the aluminum alloys on the carbon fiber and carbon-CNT, the chemical compositions of the aluminum alloys thin films were identical to the target substrates. Energy dispersive spectroscopy measurements confirmed the chemical composition of the aluminum alloy coatings. OCPs of the aluminum alloy coating on the carbon fiber and carbon-CNT were also similar to those of the bulk aluminum alloys. Dissolutions of the aluminum alloy coatings on the carbon fiber and carbon-CNT have occurred in around 40 hours and 20 hours respectively. This result suggests that CNT enhanced the dissolution of both aluminum alloy 2024 and 7075 on the carbon fiber.
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