Corrosion resistance of 45 carbon steel enhanced by laser graphene-based coating

In this study, a directly growing graphene layer on carbon steel and its corrosion performance is reported. The graphene-based coating was now prepared on carbon steel by combining electroplating and laser preparation of graphene. Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy were used to characterize the structure and composition, confirming the possibility of directly preparing few layers of graphene on carbon steel materials. The graphenebased substrate showed the highest Vickers hardness of coatings studied using the polarization curve and electrochemical impedance spectroscopy corrosion performance. The graphene-based coating's dynamic polarization curve's corrosion rate is much lower than that of pure Ni-coating and pure carbon steel material. A supplement of electrochemical impedance spectroscopy also showed the highest charge transfer resistance and the minimum double-layer capacitance. The excellent anti-corrosion performance of the laser graphene-based coating protects the carbon steel material from corrosion.