Method for corrosion repair and long-term protection of ship propeller

Abstract

The invention provides a method for corrosion repair and long-term protection of a ship propeller. The method includes the following steps that firstly, a resistance heat energy micro arc build up welding device is utilized to repair corroded parts on the surface of the ship propeller; secondly, a high velocity oxy-fuel device is utilized to prepare a ceramic protective coating on the surface of the ship propeller. According to the method for corrosion repair and long-term protection of the ship propeller, firstly the resistance heat micro arc build up welding device is utilized to weld up corrosion defects on the surface of the ship propeller, in the welding-up process, welding materials and a base body can be well metallurgically bonded, the heat affected zone is small, accuracy can be controlled, and maintenance risks are low; then the high velocity oxy-fuel device is utilized to prepare the ceramic coating on the surface of the ship propeller, the ceramic coating is ultra-strong in hardness, high in bonding strength with the base body and excellent in wear resistance and corrosion resistance, the surface of the propeller can be protected for a long term, and therefore the service life of the propeller can be greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of metal corrosion repair, and in particular relates to a method for corrosion repair and long-term protection of ship propellers. Background technique [0002] The propeller of a ship plays the role of propelling the ship forward, and its performance has a great influence on navigation. Seawater corrosion, marine organism pollution, and accidental collisions will all cause local damage to the propeller such as bending, cracks, gaps, and corrosion. When the damage is severe, the propulsion performance of the ship will be lost. [0003] The repair of the propeller directly affects the docking period and maintenance cost of the ship. Traditionally, propellers are made of copper materials. Among copper alloys, considering the requirements of corrosion resistance and damping of materials, propellers are mainly made of high manganese aluminum bronze and nickel aluminum bronze. Generally, ship propellers adopt c...

AI Technical Summary

Problems solved by technology

[0004] At present, traditional welding repair methods such as carbon dioxide gas shielded welding and manual tungsten argon arc welding are mainly used for the treatment of ship propellers after corrosion. The risk of fracture during use; at the same time, the corrosion resistance of the repaired ship propeller is further reduced due to the repaired weld seam, and corrosion on the surface of the ship propeller is more likely to occur again, so the long-term protection of the repaired propeller is also a current technology problem

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