Graphene compound vinyl ester heavy anti-corrosion coating and preparation method thereof

Abstract

The invention discloses a graphene compound vinyl ester heavy anti-corrosion coating, which comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 60-75 parts of phenolic vinyl ester resin, 0.5-2 parts of graphene, 20-30 parts of precipitated barium sulphate, 5-10 parts of sericite, 0.5-2 parts of a nano assistant, 0.5-1 part of an anti-settling agent, 0.5-2 parts of an accelerant; and the component B is 2-4 parts of a cross-linking agent. The preparation method comprises the steps of (1) adding the anti-settling agent, the nano assistant and the accelerant to the phenolic vinyl ester resin under a stirring state, stirring for 10min, adding graphene, stirring evenly, finally adding the sericite and the precipitated barium sulphate and stirring evenly to obtain a paste coating; and (2) mixing the paste coating and the cross-linking agent evenly to obtain a finished product coating. The heavy anti-corrosion coating which has excellent properties such as light weight, good chemical resistance, good solvent resistance and high wear resistance can be prepared.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, and in particular relates to a graphene composite vinyl ester heavy-duty anti-corrosion coating and a preparation method thereof. Background technique [0002] The flue gas desulfurization device system is already an environmental protection device required by my country's thermal power plants and other furnaces and sintering machines. In the desulfurization process, limestone-gypsum wet flue gas desulfurization is the most mature technology in the world, suitable for my country's national conditions and domestic application. The most efficient desulfurization process (referring to large-scale desulfurization devices), but in practical applications, it is found that flue gas desulfurization contains dust, SO 2 , HF, HCl, NOx, water vapor, H 2 SO 3 、H 2 SO 4 And other complex components, alternating acid and alkali, alternating cold and hot, alternating dry and wet, corrosion an...

AI Technical Summary

Problems solved by technology

However, glass flake coatings have the following defects in use: 1. After construction, due to the blocking of the glass flake layer, the solvent is difficult to volatilize, and various coating defects related to the solvent are prone to occur, such as: blistering, hollowing, and peeling off ; Solvent-based flake coatings are only suitable for thin layer coatings

2. Due to the addition of a large amount of glass flakes (usually more than 30%) and other wear-resistant fillers in glass flake coatings, the coating has poor adhesion on the substrate and is easy to fall off, especially during long-term use. Area flaking

But in actual use, this patent still has the following defects: 1. The coating obtained by this patent is liquid, and in actual construction applications, there are construction technical problems. Because the inner wall of the chimney is closed, no matter spraying, brushing, roller Paint will produce paint mist or solvent volatilization pollution, which can easily cause poisoning of construction workers and is not easy to construct; in addition, liquid paint cannot form a thick enough coating film. In the field of desulfurization tower construction in thermal power plants, the coating film thickness is usually 0.5 -4mm, its products cannot be realized in application technology, and cannot meet the construction requirements

2. The patented product pre-disperses graphene during preparation to make graphene masterbatch, and then adds it into the coating system, which has the defect of complex manufacturing process

3. The patented coating is three-component, and it is troublesome for construction personnel to add. At the same time, because the amount of curing accelerator added is very small, if the measurement is not accurate, it will lead to large deviations in the performance of the coating film

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