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Surface plating process of spiral plate heat exchanger
Oct 09, 2018

The spiral plate heat exchanger is the oxidant tank gas pressurizing component in the whole system of the engine. Its main function is to provide the propellant supply pressure required for the engine to work normally. In the design process, the inner and outer brazing surfaces and non-brazing surfaces of the spiral plate heat exchanger are required to be plated with Ni10-15μm, wherein the coating on the brazing surface is required for subsequent welding with other components, and the non-brazing surface coating is used as a work. When the high temperature oxidation resistance coating is used.


In general, the application of nickel plating can be divided into protective decorative and functional aspects. As a decorative decorative coating for spiral plate heat exchangers, nickel can be plated on low carbon steel, zinc castings, certain aluminum alloys, copper alloy surfaces to protect its matrix material from corrosion and by polishing dark nickel plating or directly The bright nickel method achieves a bright nickel coating for decorative purposes.


In functional applications, the repair is plated on parts of the worn, corroded or over-machined spiral plate heat exchanger. Therefore, it is generally not used as a protective coating for the steel substrate of the spiral plate heat exchanger, but as an intermediate layer and a bottom layer for protecting the decorative plating system.

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