Abstract
Nano coatings for anti-corrosion and electromagnetic wave absorbing can simultaneously implement the functions of assimilating electromagnetic waves and reducing the corrosion of materials caused by corrosive environments, such as seawater. In this work, a composite material for both electromagnetic wave absorption and anti-corrosion was prepared by an in-situ chemical oxidation and surface coating method using carbonyl iron powder (CIP), graphene oxide (GO) and aniline (AN). The synthesized composite material was characterized by scanning electron microscopy (SEM), infrared spectroscopy (FT-IR) and XRD. The carbonyl iron powder-graphene oxide-polyaniline (CIP-GO-PANI) composite material was used as the functional filler, and the epoxy resin was the matrix body for preparing the anticorrosive wave-absorbing coating. The results show that CIP had strong wave-absorbing properties, and the anti-corrosion property was greatly enhanced after being coated by GO-PANI.
Highlights
Electromagnetic waves can be interfered with by objects through conduction coupling and electromagnetic field coupling
The Tafel polarization curve and electrochemical impedance spectroscopy (EIS) of the material were tested by an electrochemical workstation (CHI660) to analyze the anti−corrosion performance
Results and Discussion trochemical impedance spectroscopy (EIS) of the material were tested by an electrochemical workstation (CHI660) to analyze the anti-corrosion performance
Summary
Electromagnetic waves can be interfered with by objects through conduction coupling and electromagnetic field coupling. It is difficult to protect against this, and it is harmful to metal materials. The wave-absorbing material has gradually become a research hotspot. Corrosion can cause great harm to materials and waste resources. The annual loss due to corrosion in many countries accounts for 3% to 5% of GDP, and the corrosion loss in China has reached 3.44% of its GDP. The steel wasted every year due to corrosion accounts for 30% of the total production, half of which can be avoided by applying modern anti-corrosion technology. Seeking non-toxic, bio-environmental coatings with anti-corrosion and wave-absorbing properties is of great significance to the sustainable development of society
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