To the severe corrosion and maintenance challenges observed in the roof steel structures of the silos during the operation of Phase III and IV of the Huanghua Port Coal Terminal,this study conducts anticorrosion research on these structures.The objective is to propose long-term anticorrosion solutions suitable for the highly corrosive port environment,extending the service life of protective coatings and reducing future maintenance frequency.Through field investigations and theoretical analysis,the primary causes of severe corrosion in the roof steel structures are identified.Based on literature review and engineering case studies,metal protection and coating protection technologies are extensively evaluated,leading to the proposal of two heavy-duty anticorrosion schemes with a design service life of no less than 30 years.Furthermore,addressing the compatibility between anticorrosion and fire protection,theoretically grounded and practical engineering case studies are employed to propose integrated anticorrosion and fire protection measures suitable for port silos.In response to the highly corrosive environment of ports,heavy-duty anticorrosion measures and anticorrosion and fire prevention supporting measures are proposed,which can increase the design life of conventional anti-corrosion protection from 10 years to 30 years,with an extension of three times.The research results can provide valuable references for the anti-corrosion design of Phase V of the Huanghua Port Coal Terminal and other similar silo structures.