Graphene metal anticorrosive paint for primary equipment in coastal areas and preparation method thereof

Abstract

The invention discloses a graphene metal anticorrosive paint for primary equipment in coastal areas and a preparation method thereof. The paint comprises the following components in parts by weight: 50-100 parts of polyvinylidene fluoride, 0.1-1 part of benzoyl hydrazine modified graphene oxide powder, 3-7 parts of a dispersing agent, 2-6 parts of a leveling agent, 5-15 parts of a curing agent, 10-20 parts of a diluent, 1-10 parts of a functional filler and 15-20 parts of a mixed solvent. The preparation method of the benzoyl hydrazine modified graphene oxide powder comprises the following steps: (1) dispersing graphene oxide in a solvent, adding benzoyl hydrazine according to a molar ratio of graphene oxide to benzoyl hydrazine of 1: (1-5), carrying out an ultrasonic treatment and separation to obtain a benzoyl hydrazine modified graphene oxide crude product; and (2) purifying the modified graphene oxide crude product obtained in the step (1) to obtain benzoyl hydrazine modified graphene oxide. Modified graphene oxide is more easily adsorbed to the metal surface, the adhesiveness of the paint is improved, diffusion of water molecules and corrosive ions can be effectively blocked,and the corrosion prevention effect is improved.

Description

technical field [0001] The invention belongs to the technical field of anticorrosion of electric primary equipment, and in particular relates to a graphene metal anticorrosion coating. Background technique [0002] With the large-scale construction of my country's power grid, substations have sprung up like mushrooms after rain. However, the corrosion of power grid equipment is one of the important reasons that affect its service life and lead to equipment and structure failure. The power grid project covers a vast area, and the natural environment in which it is located is complex and diverse. Among them, the problem of metal corrosion protection of primary equipment in coastal areas has also surfaced. The equipment that completes the functions of power generation, transmission and distribution is called primary equipment, such as generators, transformers, motors, fuses and isolating switches. At present, the most effective and direct anti-corrosion method is to apply anti-...

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Problems solved by technology

[0005] However, the graphene anti-corrosion coating prepared in the prior art lacks active functional groups on the surface of graphene, and the specific surface area is huge, so that the interface bonding strength between them and the polymer matrix is ​​low, and agglomeration easily occurs. After agglomeration, graphene particles are in the coating. The uniformity of the coating will be reduced. After the coating is applied to the metal surface, it will lead to uneven conductivity and weak protection against the metal, resulting in the inability to form a barrier effect in places where there is less graphene.

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