Novel water-based rust-conversion coating and preparation method thereof

Abstract

The invention relates to a novel water-based rust conversion coating and a preparation method thereof. The coating comprises the following components in parts by weight: 30-70 parts of water-based epoxy emulsion, 5-20 parts of a rust conversion agent, 0.5-5 parts of a penetrating agent, 5-10 parts of aluminum triphosphate, 10-20 parts of barium sulfate and 0.6-5 parts of a functional additive, wherein the water-based epoxy emulsion is a cationic water-based acidic modified epoxy emulsion. According to the invention, the cationic water-based acidic epoxy emulsion is selected as a film-forming substance and has good compatibility with an acidic rust conversion agent; based on single-component normal-temperature curing, compared with a modified water-based acrylic acid system, a paint film ofthe coating is good in water resistance and salt water resistance, good in salt spray resistance, high in adhesive force, high in hardness and excellent in storage stability. The coating is high in rust conversion rate and can chemically react with rust to generate a black compact and stable chelate, so that the purposes of rust removal, rust prevention and rust stabilization are achieved.

Description

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AI Technical Summary

Benefits of technology

This new technology allows for better quality paints that have improved durability against corrosion caused by rain or snow falling on them over time without losing their effectiveness due to damage from external factors such as weather conditions. It also includes an easy-to-use method for producing these coatings quickly while maintaining its properties.

Problems solved by technology

This patented technical problem addressed by this patents relates to improving the quality and efficiency of applying antirhealthy paints onto metallized surfaces without causing damage from oxidizing environments caused by atmospheric oxygen (O2) gas during drying processes for longer periods of time. Current methods involve manually removing any dirt particles after each step, resulting in increased costs associated therewith. Additionally, current solutions require expensive equipment like immersion brushers and scrap stones, leading to wastewater contamination issues. There is an urgent demand for developing effective ways to provide long lasting and environmentally friendly rust conversion layers over various types of materials due to their superior ability to resist corrosivity compared to existing approaches involving chrome plated structures.