Copper and nickel pipe anti-corrosion device

Abstract

The invention discloses a copper and nickel pipe anti-corrosion device. The copper and nickel pipe anti-corrosion device comprises a steel pipe and two copper and nickel pipes. The two ends of the steel pipe are welded with steel pipe flanges, the two copper and nickel pipes are arranged on the two sides of the steel pipe, copper and nickel pipe flanges are welded to the ends, close to the steel pipe, of the two copper and nickel pipes, flange seal gaskets are arranged between the steel pipe flanges and the copper and nickel pipe flanges, multiple sets of mounting holes are formed in the circumferential direction of the steel pipe flanges and the copper and nickel pipe flanges at equal distances, bolt connecting assemblies are arranged in the mounting holes, and each bolt connecting assembly comprises a connecting bolt, a locking nut, a connecting nut and an elastic gasket. The galvanic corrosion principle generated by contact between different materials can be used for enabling corrosion of the steel pipe in the copper and nickel pipe system to be quickened, and the cooper and nickel pipe system and other devices and materials on ships can be protected against corrosion.

Description

technical field [0001] The invention relates to the technical field of copper-nickel tube anticorrosion devices, in particular to a copper-nickel tube anticorrosion device. Background technique [0002] Due to the rapid development of modern shipbuilding, the maintenance of working ships is one of the main factors for the increase in operating costs, especially for the cooling water system of the main and auxiliary machines. If the seawater cooling system is more serious, it will have to stop sailing and go to the shipyard for repairs Therefore, in recent years, in order to avoid such maintenance incidents, some shipowners have begun to use copper-nickel pipes in the seawater cooling system in new ships. The anti-corrosion effect of copper-nickel materials is better than that of copper and 304 stainless steel. 2 Although its anti-corrosion effect is very good, if it is not handled properly, it will accelerate the corrosion of other equipment and materials on the ship, which ...

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Problems solved by technology

[0002] Due to the rapid development of modern shipbuilding, the maintenance of working ships is one of the main factors for the increase in operating costs, especially for the cooling water system of the main and auxiliary machines. If the seawater cooling system is more serious, it will have to stop sailing and go to the shipyard for repairs Therefore, in recent years, in order to avoid such maintenance incidents, some shipowners have begun to use copper-nickel pipes in the seawater cooling system in new ships. The anti-corrosion effect of copper-nickel materials is better than that of copper and 304 stainless steel. 2 Although its anti-corrosion effect is very good, if it is not handled properly, it will accelerate the corrosion of other equipment and materials on the ship, which will also increase the repair cost of the ship. This phenomenon is called potential difference corrosion. It is also used. The most primitive method is to improve the corrosion resistance of the surface by passing the factory passivation or adding a throttle orifice to control the flow rate of the liquid inside the pipeline and the dense surface film formed by the natural oxidation of the copper-nickel tube, or adding insulating tape and The insulating sleeve isolates the connection with other equipment and materials to reduce the potential difference corrosion with other equipment and materials, and ensure that other equipment and materials

This situation works only when there is no water passing through the pipeline, but since water is also a conductor, there is water flowing inside the pipeline during working hours, so the isolation of the pipeline system will also cause potential difference corrosion

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