▎ 摘　　要

NOVELTY - Corrosion-inhibiting primer prepared by uniformly mixing 3-8 pt. wt. epoxy resin, 0.5-2 pt. wt. toughening agent, 0.1-1.5 pt. wt. curing agent, 2-5 pt. wt. accelerator/chromate/graphene composite, and 75-95 pt. wt. solvent, co-curing with adhesive film or sealant to bond metal substrates, spraying onto the surface of the metal substrate and pre-curing at 120-130 °C, and then coating an adhesive film or sealant to cure and bond the metal substrate, is claimed. USE - The corrosion-inhibiting primer is useful for structure bonding for inhibiting corrosion bottom glue of large aviation aircraft for glue joint of medium-temperature curing metal bearing structure. ADVANTAGE - The method adopts the lamellar structure of graphene and the chromate on the surface of the lamellae; prevents water molecules from invading epoxy resin and inhibits the corrosion of metal substrates; utilizes the steric hindrance effect and ionic bond complexation of graphene; reduces the reactivity of the substituted urea accelerator; solves the problems of poor heat and humidity resistance and short storage period of the primer of epoxy resin system. The primer has good corrosion resistance and applicability, and meets the needs of large aviation aircraft for corrosion-inhibiting primers and is suitable for medium temperature curing metal Bonding of load-bearing structures. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing corrosion-inhibiting primer for structural adhesive bonding comprising (1) mixing graphene oxide and deionized water, ultrasonically processing for 30 minutes to obtain a uniformly dispersed graphene oxide aqueous solution, adding chromate raw materials and dissolve them completely, adding the mixed solution to the reaction kettle, heating to 100-120°C, and stirred for 30 minutes, reducing the temperature of the reaction kettle to 30-60°C, adding an accelerator, stirring the mixture for 30 minutes, filtering the product and vacuum-drying to obtain accelerator/chromate/graphene composite, (2) providing epoxy resin, curing agent, toughening agent and accelerator/chromate/graphene composite, and (3) adding epoxy resin, curing agent, toughening agent and accelerator/chromate/graphene composite into the reaction kettle, adding solvent, using mechanical blending method to rotate at 200-600 revolutions/minute, mixing epoxy resin, curing agent, toughening agent and accelerator/chromate/graphene compound until it is completely dissolved and uniform without precipitation.