A kind of electroplating solution for forming nickel-molybdenum rare earth-molybdenum disilicide composite coating and its preparation method and application

Abstract

The invention discloses electroplating liquid used for forming nickel molybdenum rare earth-molybdenum disilicide composite plating and a preparation method of the electroplating liquid. The per liter of the electroplating liquid used for forming the nickel molybdenum rare earth-molybdenum disilicide composite plating comprises the following components by mass: 10 to 400 g nickel salt, 10 to 800 g molybdenum polyoxometallate, 5 to 100 g complexing agent, 10 to 300 g chloride, 0.5 to 6 g rare earth, 5 to 60 g molybdenum disilicide, 0.01 to 0.9 g surfactant and water in balancing amount. The preparation method of the electroplating liquid comprises the following four steps: preparing a rare earth salt solution, pre-treating molybdenum disilicide particles, preparing nickel salt-molybdenum polyoxometallate-complexing agent-chloride-rare earth salt mixed liquor, and preparing the electroplating liquid of the nickel molybdenum rare earth-molybdenum disilicide composite plating, and the obtained electroplating liquid used for forming nickel molybdenum rare earth-molybdenum disilicide composite plating is used for performing electroplating on to-be-plated pieces to form the nickel molybdenum rare earth-molybdenum disilicide composite plating.

Description

technical field [0001] The invention relates to an electroplating solution for forming a nickel-molybdenum rare earth-molybdenum disilicide composite coating, a preparation method and application thereof. Background technique [0002] Thermal barrier coating technology is currently the only practical way to greatly increase the working temperature of metal high-temperature materials. High-temperature alloys include nickel-based alloys, molybdenum-based alloys, titanium-based alloys, and niobium-based alloys. Nickel-based alloys are commonly used high-temperature alloys. At present, most of the thermal barrier coatings that have been practically used are double-layer structures. The surface layer is a ceramic insulation layer, which is mainly used for heat insulation, corrosion resistance, erosion and erosion; the bottom layer is a metal bonding layer, which plays a role in resisting high temperature oxidation corrosion and improving The role of the physical compatibility of...

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Problems solved by technology

MoSi 2 Because of its dual characteristics of ceramics and metals, good comprehensive mechanical properties, high melting point, moderate specific gravity, low thermal expansion coefficient, good high temperature oxidation resistance and good electrical and thermal conductivity, it is used in nickel-molybdenum rare earth alloy coatings Mixed with solid molybdenum disilicide particles, it can improve the thermal expansion coefficient, hardness, wear resistance, corrosion resistance, self-lubrication, etc. of the coating, but there is no related report on the nickel-molybdenum rare earth-molybdenum disilicide composite coating and its preparation method