Preparation method of nano anticorrosion additive for ship waterborne anticorrosion coating

Abstract

The invention relates to the preparation technology of water-based anti-corrosion additives, and aims to provide a preparation method of nano-anti-corrosion additives used for water-based anti-corrosion coatings for ships. It includes: mixing SiCl4 and methyl triethoxyethyl silicate to form a siloxane mixture, adding dropwise to aqueous hydrochloric acid solution, and distilling under reduced pressure to obtain a concentrated aqueous nano-silica sol; then adding CeNO3, mixing to obtain a nano-silica sol Antiseptic additives. The present invention uses SiCl4 as raw material to prepare nano-silica sol, the hydrolytic polymerization speed is fast, and the silica nano-phase can be formed rapidly, and at the same time, the addition of alkoxysilane-methyltrimethoxysilane with organic groups together prevents The produced highly active nano silicon dioxide undergoes a polymerization reaction to form a gel, which improves the stability of the sol. On the other hand, the introduction of corrosion inhibitors through nano-phases improves the dispersion of corrosion inhibitors and improves the corrosion inhibition performance of anti-corrosion additives.

Description

Technical field [0001] The invention relates to a preparation technology of a water-based anti-corrosion additive, in particular to a preparation method of a nano anti-corrosion additive used in a ship's water-based anti-corrosion coating. Background technique [0002] Anticorrosive coatings for ships, especially for ship hulls, have high requirements for the corrosion resistance of the coatings. Ordinary organic resins and other anticorrosive coatings are combined with pretreatment layers and primers. At the same time, zinc powder and other anode protective agents are added. It has better corrosion resistance under the circumstances. However, the organic water-based anticorrosive coating has strong water absorption and will cause swelling, which will reduce its shielding effect on corrosive media after a certain period of use. Therefore, it needs to be repaired and recoated after a period of use to ensure the normal operation of the ship. [0003] Nanomaterials have a good reinfo...

AI Technical Summary

Problems solved by technology

However, since the activity of the powder increases with the decrease of the particle size of the powder, the nano powder is easy to agglomerate when it exists in the form of dry powder, and it is difficult to disperse evenly in the organic paint film, and it is difficult to achieve the ideal reinforcing effect