Preparation method for electroplating dispersing agent nickel coated aluminum powder

A nickel-clad aluminum and dispersant technology, which is applied in the field of preparation of electroplating dispersants, can solve the problems of unusable, poor corrosion resistance at high temperature and corrosion resistance, and achieve the effect of reducing costs and improving economic benefits

Inactive Publication Date: 2013-09-04
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Problems solved by technology

[0002] Ordinary carbon steel (A3) is one of the most widely used structural materials, but because of its poor corrosion resistance, especially high temperature corrosion resistance, it cannot be used in some harsh environments

Method used

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with examples.

[0017] The invention adopts the electroless plating method to plate nickel on the surface of the micron-sized aluminum powder in a nickel sulfate system, and the nickel-coated aluminum powder formed in this way can be used as a dispersant for the next step of composite plating. The results of electroless plating show that: in the nickel sulfate system, the pH value of the plating solution is 11.0; when the bath temperature of the plating solution is 88°C, the nickel content of the plated nickel-coated aluminum powder is about 55% by mass, and the phosphorus content is almost zero. Nickel plating can control the phosphorus content of impurities in the coating by controlling the acidity of the plating solution. The higher the alkalinity, the lower the phosphorus content. When the pH value of the plating solution is greater than 11, the phosphorus content in the coating is almost zero; ...

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Abstract

The invention provides a preparation method for electroplating dispersing agent nickel coated aluminum powder and relates to a preparation method for an electroplating dispersing agent. According to the preparation method, nickel sulfate serves as main salt, sodium monophosphate serves as a reducing agent, sodium citrate serves as a complexing agent, citric acid serves as an accelerator, thiourea serves as a stabilizer, and pH is adjusted through ammonia water. Nickel is plated on the surface of the particle size micron aluminum powder in a nickel sulfate system in a chemical plating method, the formed nickel coated aluminum powder can serve as a dispersing agent for next composite plating, and a foundation is laid for later composite nickel plating on a base part. Good experiment environments are provided for high-temperature coating experiments, not only is a novel method for preparing a high temperature protection coating exploited, but also the method can be popularized to preparation of other covering type high temperature protection coatings by adopting a composite plating method and a thermal reaction diffusion technology and is of great significance for reducing production cost, improving economic benefit and expanding applications of new materials.

Description

technical field [0001] The invention relates to a preparation method of an electroplating dispersant, in particular to a preparation method of an electroplating dispersant nickel-coated aluminum powder. Background technique [0002] Ordinary carbon steel (A3) is one of the most widely used structural materials, but it cannot be used in some harsh environments because of its poor corrosion resistance, especially high temperature corrosion resistance. If the corrosion resistance and high-temperature oxidation corrosion of ordinary carbon steel are improved at room temperature, it has important practical significance. A high-temperature protective coating currently widely used is an alumina coating, which has excellent high-temperature anti-corrosion properties, and also has good wear resistance, impact resistance, and acid-base corrosion resistance. [0003] In order to finally form an alumina coating on the surface of ordinary carbon steel, the steel surface needs to be pre-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02C23C18/36C23C18/18
Inventor 陈尚东赵进
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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