Preparation method for seawater corrosion resistant type self-lubricating material

Abstract

The invention discloses a preparation method for a seawater corrosion resistant type self-lubricating material, and belongs to the technical field of self-lubricating material preparation. The preparation method is characterized in that polyethylene is cracked and polyethylene wax is collected; a nickel basal body layer is deposited on a polyethylene wax surface layer through the electro-deposition effect; copper is replaced and covered to a nickel surface, so that a double-layer clad structure is formed; in a self-lubricating process, a self-friction material is cracked as a result of the friction effect to release inner-layer polyethylene wax; a high temperature generated by friction is absorbed by the polyethylene wax, so that the polyethylene wax is molten and coated to the surface of a self-friction material copper-nickel composite, and therefore, a lubricating protective film layer is formed; and while lubricating efficiency is improved, point corrosion caused by deposition of pollutants in seawater is effectively prevented, and lubricating efficiency of the self-lubricating material is improved.

Description

technical field [0001] The invention discloses a preparation method of a seawater corrosion-resistant self-lubricating material, which belongs to the technical field of self-lubricating material preparation. Background technique [0002] The ocean covers more than 70% of the Earth's surface area and is also the most abundant natural electrolyte. Seawater is an electrolyte containing a certain amount of salt, and metal materials will inevitably undergo electrochemical corrosion in it. However, because the ocean has tides, wave motion and spray splashes, as well as marine organisms and entrained sediment, the actual situation is much more complicated than the corrosion of a static electrolyte solution containing the same salt. In marine environments, the most common types of corrosion are general corrosion, galvanic corrosion, pitting corrosion, crevice corrosion, and cavitation corrosion. Factors affecting the corrosivity of seawater can be divided into chemical factors, ph...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the defects that existing nickel-based self-lubricating materials are easily covered by sediments in seawater, resulting in the loss of passivation and pitting corrosion, and reducing the lubrication efficiency of self-lubricating materials, a kind of The method of forming a lubricating protective layer and improving the lubrication efficiency through frictional melting of polyethylene wax, the present invention cracks polyethylene and collects polyethylene wax, and then deposits a layer of nickel layer on the surface of polyethylene wax through electrodeposition, and then Copper is replaced and coated on the nickel surface to form a double-coated structure. During the self-lubricating process, due to friction, the self-friction material breaks, releasing the inner layer of polyethylene wax, and then absorbs the high temperature generated by friction through the polyethylene wax It is melted and coated on the surface of the self-lubricating material copper-nickel composite to form a layer of lubricating protective film, which can effectively prevent pitting caused by the deposition of pollutants in seawater while improving the lubrication efficiency, and improve the lubrication efficiency of the self-lubricating material