High-solid-content superhigh-corrosion-resistant water-based epoxy static conductive paint and preparation method thereof

Abstract

The invention discloses a high-solid-content superhigh-corrosion-resistant water-based epoxy static conductive paint and a preparation method thereof. The high-solid-content superhigh-corrosion-resistant water-based epoxy static conductive paint comprises a component A and a component B, wherein the component A comprises deionized water, wetting dispersant, a foam inhibitor, a flash corrosion inhibitor, a water-based epoxy curing agent, a film-forming cosolvent, conductive mica powder, a corrosion inhibitor, a defoaming agent, a flatting agent and a thickening agent; and the component B comprises modified epoxy resin, a conductive additive, an anti-settling agent, an amphoteric dispersant, an amphoteric defoaming agent, a diluents and a filler. The high-solid-content superhigh-corrosion-resistant water-based epoxy static conductive paint is smooth and hard in paint film, high in compactness, excellent in physical and mechanical properties such as adhesive power, high in heat resistance and water resistance, superhigh in corrosion resistance, and stable in conductivity; the painting requirement can be met by forming a film at one step; the paint is low in cost and strong in market competitiveness; and the deionized water serves as a solvent, so the paint is non-toxic, harmless, safe and environment-friendly.

Description

technical field [0001] The invention relates to a paint technology, in particular to a water-based epoxy electrostatic conductive paint with high solid content and super corrosion resistance and a preparation method thereof. Background technique [0002] With the rapid development of my country's petrochemical industry, the production and use of petroleum products are increasing, and the corrosion and static electricity safety issues of petroleum storage tanks are increasingly concerned. The electrostatic hazard of the oil tank is mainly due to the increase of the static voltage in the oil tank due to the charged oil flow. If only a general insulating anti-corrosion layer is used in the oil tank, the static electricity in the oil tank cannot be discharged in time, and there is a hidden danger of the oil tank explosion. Therefore, the anticorrosion of oil tanks must not only have good corrosion resistance, but also have excellent static conductivity. It is the most direct, m...

AI Technical Summary

Problems solved by technology

However, doped polyaniline conductive fillers will lead to increased brittleness of epoxy coatings, and nano-SiO 2 The formation of hybridization greatly shortens the gelation time of the system; at the same time, the addition of doped polyaniline requires 2 hours of high-speed dispersion, resulting in long production cycles and low efficiency.

In addition, the active diluent added in the system will obviously affect the heat resistance of the paint film, resulting in poor heat resistance of the coating

[0004] "Coating Technology and Abstracts" No. 3, 2008, 25-31 "Development of light-colored water-based anti-static anti-corrosion coatings in tanks" adopts the third-generation water-based system, using water-based epoxy resin and water-based epoxy curing agent to cross-link and cure Film-forming, but poor acid resistance, composite coating resistant to 5%H 2 SO 4 Only achieve 22d without change, can not meet the GB50393-2008 "Technical Specifications for Anti-corrosion Engineering of Steel Petroleum Storage Tanks" 5%H resistance 2 SO 4 The requirement of up to 720 hours is difficult to ensure long-term anticorrosion of oil storage tanks and oil pipelines that have been in acidic environments for a long time

At the same time, the solid content of the system is low, about 40%-60%, and the film formation in one layer is relatively thin, requiring multiple layers of construction to meet the requirements, resulting in low efficiency and increased construction costs

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