Anti-drag epoxy coating in water-based pipeline, preparation method of anti-drag epoxy coating, anti-corrosion coating, and application of anti-drag epoxy coating

Abstract

The invention relates to an anti-drag epoxy coating in a water-based pipeline, a preparation method of the anti-drag epoxy coating, an anti-corrosion coating, and an application of the anti-drag epoxycoating, and belongs to the technical field of anti-corrosion coatings. The anti-drag epoxy coating in the water-based pipeline comprises a first component and a second component. The first componentcomprises the following components in parts by weight: 1 part of a water-based epoxy emulsion, 0.3-0.5 part of deionized water, 0.005-0.01 part of modified graphene, 0.05-0.1 part of modified nano SiO2, 0.95-1.25 part of a pigment filler, 0.01-0.02 part of a defoaming agent, 0.01-0.03 part of a dispersing agent, 0.01-0.03 part of a flatting agent, 0.01-0.02 part of an anti-flash-rust agent, 0.01-0.02 part of an adhesion promoting agent, 0.01-0.02 part of a bactericide and 0.01-0.02 part of a thickening agent. The second component comprises the following components in parts by weight: 1 part of a water-based epoxy amine curing agent and 0.2 part of a coalescing agent. The anti-drag epoxy coating can greatly reduce gas transmission resistance, and can be used for corrosion prevention and protection of the inner wall of conveying pipelines for natural gas conveying, coal gas conveying, gas-liquid mixed conveying of natural gas-condensed liquid and the like.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, and in particular relates to a drag-reducing epoxy coating in a water-based pipeline, a preparation method thereof, an anti-corrosion coating and an application thereof. Background technique [0002] With the continuous strengthening of people's awareness of environmental protection, more and more attention has been paid to the development and use of environmentally friendly coatings. Water-based anti-corrosion coatings is a major trend in the development of the coatings industry today, and the country is also vigorously promoting the development of water-based coatings. Compared with solvent-based coatings, water-based coatings greatly reduce the VOC content, and even reduce the VOC content to zero, which is a real "green" coating. [0003] Waterborne epoxy coatings are widely used because of their good handling properties, good adhesion to most substrates, and the ability to cu...

AI Technical Summary

Problems solved by technology

First of all, due to the high surface tension of water, the wettability of water-based epoxy coatings to steel is poor, and problems such as shrinkage cavities and poor adhesion are prone to occur

Secondly, in the process of preparing water-based epoxy emulsion, a large number of hydrophilic groups are usually introduced into the resin segment, which will greatly reduce the cross-linking density of the water-based epoxy coating, thereby affecting the relationship between the coating and the substrate. Adhesion between

At the same time, the introduction of a large number of hydrophilic groups and the reduction of crosslinking density will lead to a decrease in the corrosion resistance of the coating.

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