▎ 摘　　要

NOVELTY - Chromium-free DACROMET (RTM: Zinc and aluminum flake coating) coating liquid comprises 20-40 pts. wt. metal powder, 30-60 pts. wt. binder, 5-10 pts. wt. dopamine, 3-5 pts. wt. hydroxylated graphene, 1-5 pts. wt. passivant, 5 -15 pts. wt. wetting dispersant, 10-30 pts. wt. thickening agent-2 and organic solvent. USE - The chromium-free DACROMET (RTM: Zinc and aluminum flake coating in the treatment of the decorative material surface (claimed). ADVANTAGE - The chromium-free corrosion resistant coating coating liquid ensures the original super-strong corrosion resistance, no hydrogen brittleness, high heat resistance, and no three wastes product, under the condition of good permeability, replacing the chromium containing component, avoiding the potential hazard to the environment and human body, at the same time, improving the formulation of the adhesive, in the component by adding dopamine and hydroxylation, graphene as to effectively improve the sealing performance of the coating layer, further improving the anti-corrosion effect, and it is good for forming coating on base material base material, and has excellent adhesive force. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing chromium-free dacromet, which involves: 1. adding the adhesive and organic solvent into the mixing kettle starting stirring until the mixed material is uniform; 2. adding metal powder into the mixing kettle hydroxylation graphene passivating agent and wetting dispersant continuously, stirring until mixing uniformly; 3. testing the material liquid viscosity in the mixing kettle, adding dopamine and thickening agent, adjusting viscosity stirring to mix, uniformly standing until the de-foaming is finished to obtain the chromium-free dacromet coating liquid.