A kind of ship derusting method

Abstract

The invention discloses a method for descaling a ship. The method comprises the following steps: performing pretreatment on the surface of a steel plate, performing sanding on a substrate, performing defect repair sandblasting on structures of welding seams and the like, finishing a primer, spraying a reinforcing paint, spraying a finishing paint and performing subsequent maintenance. By adopting the descaling method disclosed by the invention, the surface of a steel product is subjected to pretreatment before coating, and parts with high antirust requirements are sprayed with an epoxy anticorrosive paint and then are subjected to integral spraying; during the integral spraying, a water-based paint is adopted at the bottom of a ship, and an acrylic acid water-based paint has the advantages of weathering resistance, luster maintenance, color holding, rust protection and corrosion protection and also has good adhesive force, corrosion resistance and fouling resistance, so that the acrylic acid water-based paint not only meets requirements on half matt gloss and sub matt gloss of an anticorrosive paint for a cabin, but also is easy to smear for a plurality of times, is less volatile for water, has relatively strong adhesive force and cannot cause flush rust. The method disclosed by the invention is short in process flow, and a produced ship has good antirust, anticorrosive and anti-fouling properties.

Description

technical field [0001] The invention relates to an antirust method, in particular to an antirust method for marine ships. Background technique [0002] Seawater is the largest and highly corrosive natural electrolyte in nature. Seawater contains almost all chemical elements on the earth, and its composition is very complex. In addition, seawater also contains dissolved oxygen, marine life and decaying organic matter. These substances have caused great harm to metal components such as various marine transportation tools, oil production platforms, and marine equipment. With the development of coastal transportation, industrial production, and national defense construction in various countries, the threat of seawater and marine atmospheric corrosion has also become more and more serious. The more prominent, the more applicable and economical marine engineering protection method is to apply marine coatings that resist seawater corrosion. [0003] In the research of marine anti...

AI Technical Summary

Problems solved by technology

However, the interior cabins of ships (mainly drinking water tanks, oil tanks, ballast water tanks, cargo tanks, cofferdams, engine rooms, etc.) are narrow, dark and humid. In winter or when the temperature is low, due to the temperature difference between indoor and outdoor, Condensation on the wall, if things go on like this, moldy walls, wood rot, and metal corrosion will shorten the life of the cabin, so there are higher requirements for cabin coatings, and the development of coatings suitable for the special environment of the cabin has become a top priority in the research of marine coatings

[0004] The anti-corrosion and anti-fouling guarantee period of the paint on the outer plate of the ship in the prior art is 3 years. After 3 years and every three years thereafter, the ship will be docked for anti-corrosion and anti-fouling maintenance on the outer plate. The docking maintenance of the ship will affect the operation of the ship and cause a lot of maintenance costs, which is something every shipowner wants to avoid