Biodegradable water-based anti-corrosion composite paint remover for ships and preparation method of paint remover

Abstract

The invention discloses a biodegradable water-based anti-corrosion composite paint remover for ships. The paint remover is prepared from raw materials in parts by weight as follows: 37-38 parts of benzyl alcohol, 2-3 parts of N-methyl pyrrolidone, 6.7-7.3 parts of absolute ethyl alcohol, 0.2-0.5 parts of sodium malate, 2-4 parts of alkyl glycoside, 5-7 parts of polylactic acid, 1-2 parts of maltodextrin powder, 12-13 parts of corn gluten meal, 11-14 parts of pomegranate rind, 6-8 parts of a styrene-acrylic emulsion, 2.8-3.2 parts of phenyl trimethoxy silane, 1.8-2.2 parts of a self-made emulsifier and 46-49 parts of water. The prepared composite paint remover has high dissolution capacity for common paint layers, has the high paint removal speed, is low in cost and can be reused, waste residues produced by paint removal can be biodegraded, raw materials are easy to obtain, and the production technology is simple.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a biodegradable water-based anti-corrosion composite paint remover for ships and a preparation method thereof. Background technique [0002] Under normal circumstances, when a ship sails for 2-3 years, the paint film of the hull will be eroded by various corrosive media and damaged by mechanical damage, resulting in damage and aging of the paint film, and it is necessary to stop sailing and dock for necessary maintenance. In the maintenance process, it is necessary to completely remove the original paint film and repaint it again. There are many methods that can be used to remove the old paint film, such as mechanical removal, flame erosion, and paint stripper method. Among these methods, the paint stripper method is one of the most commonly used methods because it does not require With relatively large manpower and material resources, the original paint film can...

AI Technical Summary

Problems solved by technology

[0005] However, the water-based paint remover in this article still contains organic main solvents and mixed acid accelerators, which have a great corrosion and damage effect on the underlying metal materials of the paint, and are not environmentally friendly. Reducing the amount of the paint remover also has the risk of reducing the paint removal efficiency. Therefore, after confirming efficient paint removal At the same time, it is also necessary to strengthen the anti-corrosion protection of the base metal; adding carboxymethyl cellulose as a thickener in the article can improve the wall-hanging property of the paint remover to a certain extent, but the wall-hanging time of the complex metal surface used on the vertical surface Short, the contact time between the paint remover and the old paint film is short, and the paint removal efficiency is low, which limits the application range of the paint remover. In addition, the sludge-like substances produced by chemical paint removal are collected, stored, transported and disposed of Improper handling will also cause harm to the environment that cannot be underestimated