Preparation method for nano anti-corrosion additive for water-based anti-corrosion paint for ships

Abstract

The invention relates to the preparation technique of water-based anti-corrosion additives, and aims to provide a preparation method for a nano anti-corrosion additive for water-based anti-corrosion paint for ships. The preparation method comprises the following steps: mixing SiCl4 and methyl triethoxy ethyl silicate to form a siloxane mixture, dropwise adding the siloxane mixture into a hydrochloric acid water solution, and conducting reduced pressure distillation to obtain concentrated water-based nano silicon dioxide sol; then adding CeNO3, uniformly mixing to obtain the nano anti-corrosion additive. SiCl4 is used as the raw material to prepare the nano silicon dioxide sol; the hydrolytic polymerization speed is high, and silicon dioxide nanophase can be quickly formed; in addition, through the addition of alkoxy silane and methyl trimethoxy silane which contain organic groups and are subjected to hydrolytic polymerization together, the condition that produced high-activity nano silicon dioxide conducts polymerization reaction to form gel is prevented, and the stability of sol is improved. Moreover, through the introduction of nanophase into a corrosion inhibitor, the degree of dispersion of the corrosion inhibitor is improved, and the corrosion inhibition performance of the anti-corrosion additive is improved.

Description

technical field [0001] The invention relates to the preparation technology of water-based anti-corrosion additives, in particular to a preparation method of nano-anti-corrosion additives used for ship water-based anti-corrosion coatings. Background technique [0002] Anti-corrosion coatings for ships, especially anti-corrosion coatings for hulls, have high requirements on the corrosion resistance of coatings. Ordinary organic resin and other anti-corrosion coatings are combined with pretreatment layers and primers, and zinc powder and other anodic protective agents are added at the same time. It has better corrosion resistance performance. However, the organic water-based anti-corrosion 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 ...

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