Aluminum material chromium-free passivator based on graphene modification as well as preparation method and application of aluminum material chromium-free passivator

The invention relates to the technical field of aluminum material environment-friendly passivation and rust prevention, in particular to a graphene modification-based aluminum material chromium-free passivator and a preparation method and application thereof, and the graphene modification-based aluminum material chromium-free passivator comprises the following components in percentage by weight: 0.06%-0.5% of hexafluorozirconic acid, 0.12%-0.2% of fluotitanic acid, 0.01%-0.06% of fluoborate, 0.1%-0.2% of sulfuric acid, 0.01%-1% of a modified graphene dispersion solution and the balance of a solvent. The chromium-free passivating agent contains a trace amount of modified graphene, so that a more compact passivating protective film can be formed, the chromium-free passivating agent has certain lubricity, can meet the requirements of most aluminum products for tests of 480 hours or more in neutral salt spray tests and passivating treatment processes with corrosion resistance equivalent to those of chromium proce