Ship corrosion preventing method

Abstract

The invention discloses a ship corrosion preventing method. The ship corrosion preventing method comprises the following steps of steel plate surface pre-treatment, base material sanding treatment, weld joint and other structure defect repair sand blasting, priming paint coating, strengthening paint spraying, finishing paint spraying and follow-up maintenance. According to the ship corrosion preventing method, steel plate surface pre-treatment is performed before coating, an epoxy anticorrosive coating is sprayed on the position with high rust-proof requirement, and whole spraying is performed after spraying; during whole spraying, corrosion resistant polyurethane serves as film forming matter, a coating for a framework formed by sheet metal flakes does not contain precious metal and toxic components and is a novel environment-friendly coating, flakes are formed and distributed on the material surface, multiple layers of flakes are horizontally arranged in an overlapped mode, a path for a corrosive medium to permeate into a base material is prolonged, and the corrosion preventing performance of the coating is improved. The ship corrosion preventing method is short in technological process, and produced ships have excellent rust, corrosion and fouling preventing performance.

Description

technical field [0001] The invention relates to an anticorrosion 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 marin...

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