Graphene powder bimetallic paint and preparation method thereof

Abstract

The invention discloses a graphene powder bimetallic paint. The graphene powder bimetallic paint is composed of base materials, filler, volatile corrosion inhibitor and auxiliaries, wherein the base materials are composed of, by weight part, 30-50 parts of epoxy resin powder, 5-30 parts of phenolic hydroxyl resin, 5-15 parts of polytetrafluoroethylene resin and 5-15 parts of fluorocarbon powder resin; the filler is composed of 30-60 parts of flake zinc powder, 1-5 parts of flake aluminum powder, 5-10 parts of aluminum tripolyphosphate, 5-10 parts of zinc phosphate and 0.05-1 part of graphene.The graphene powder bimetallic paint is high in shielding effects, the added graphene can significantly increase conductivity of flake metals, enhance the electrochemical protecting effects as well asthe utilization rate of the zinc powder of coatings and accordingly greatly enhance the anti-corrosion effects of the coatings; the added flake aluminum powder can enhance the shielding effects of the coatings and endow the coatings with a silver gray metal appearance so that the graphene powder bimetallic paint can be applied as a finishing coating, and meanwhile, the metal appearance can achieve reflecting effects on ultraviolet rays to corresponding increase the anti-ageing effects of the coatings.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a powder bimetallic coating containing graphene and a preparation method thereof. Background technique [0002] Hot-dip galvanizing is also called hot-dip galvanizing. It is to immerse the rust-removed steel components in a zinc solution melted at a high temperature of about 600 ° C, so that the surface of the steel components is attached with a zinc layer. The above thick plate is not less than 86μm. As an effective metal anti-corrosion method, hot-dip galvanizing process has been widely used in metal structure facilities in various industries. [0003] The existing hot-dip galvanizing process such as figure 1 As shown, however, the existing hot-dip galvanizing construction technology has many defects: [0004] (1) The pickling process uses 20% hydrochloric acid, which will produce a large amount of acid waste liquid. The activation and exposure treatment stages use ZnCl2 and NH4Cl so...

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Problems solved by technology

[0004] (1) The pickling process uses 20% hydrochloric acid, which will produce a large amount of acid waste liquid. The activation and exposure treatment stages use ZnCl2 and NH4Cl solutions, which will generate a large amount of industrial wastewater. If they are directly discharged, they will cause damage to water resources and soil resources. Severe pollution and high cost of wastewater treatment;

[0005] (2) A large amount of coal resources need to be consumed in this process to maintain the temperature of the zinc bath, which results in a serious waste of energy

[0006] (3) The construction process is complex and the construction environment is harsh

During the construction process, a large amount of waste gas and waste liquid are generated, and the treatment is difficult, causing pollution to the surrounding environment

[0007] (4) Serious waste of zinc resources

However, because powder coatings do not have the electrochemical cathodic protection effect of zinc-rich coatings, powder coatings must be combined with hot-dip galvanizing, electro-galvanizing or other cathodic protection systems when they are applied in the field of heavy-duty corrosion protection, which not only increases the project cost but also caused a great waste of resources

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