Sustainable additives for anticorrosive bitumen coatings on carbon steel under marine environment: Harnessing remnant agricultural biomass-derived green graphene

•A promising and sustainable solution using green additives for anticorrosive coating on carbon steel.•Influence of green graphene mixed with bitumen coating improves corrosion resistance property (99.5%).•Green graphene and bitumen coating improves, hydrophobicity, and nano-hardness of composite coating. Here, we present the utilization of sustainable silica-rich green graphene (GG), obtained from the pyrolysis of remnant agricultural biomass (RAB), to enhance the corrosion-resistant properties of bitumen-modified coatings on carbon steel. Potentiodynamic polarization (PDP) analysis of GG-modified bitumen coatings exhibited higher corrosion resistance compared to uncoated steel, along with improved nano-hardness and hydrophobicity. The chemical interactions and barrier properties of GG-modified coatings hinder corrosive species ingress on to the metal surface, offering a sustainable, cost-effective solution for advanced corrosion-resistant coating material onunderground pipelines in marine environment.