Preparation method of metal surface copper-nickel alloy

Abstract

The invention discloses a preparation method of a metal surface copper-nickel alloy, which comprises the following steps: (1) metal surface pretreatment; (2) solution preparation; (3) constant-current deposition of copper-nickel alloy; and (4) surface heat treatment. The preparation method has the advantages of simple process, controllable temperature and components, low cost, high efficiency, no pollution and no risk. The electrochemical testing proves that the copper-nickel alloy film has better corrosion resistance than the metal bare sample. The copper-nickel alloy has the advantages of low heat treatment temperature, short holding time and more compact and uniform film; and the electrochemical testing proves that the corrosion resistance is further enhanced.

Description

technical field [0001] The invention relates to the technical field of metal surface anticorrosion, in particular to a method for preparing a copper-nickel alloy on a metal surface. Background technique [0002] Metal corrosion is a natural phenomenon ubiquitous in nature. It is a phenomenon in which metal materials and the surrounding environment undergo chemical or electrochemical effects and are destroyed. The direct economic loss caused by metal corrosion accounts for about 3% of the gross national product every year. Therefore, metal corrosion and protection are related to the sustainable development of the entire national economy. The ocean occupies more than 70% of the earth's surface area, and people pay more and more attention to the rational development and utilization of ocean resources. Seawater contains chloride ions that are prone to corrosion, and many engineering metal materials such as steel, aluminum, and even stainless steel are not resistant to seawater ...

AI Technical Summary

Problems solved by technology

Although these synthesis methods can successfully synthesize copper-nickel alloys, most of the prepared copper-nickel alloy powders

Moreover, the application of these methods has major disadvantages

Part of the equipment is more complex, the required temperature is high, and the environment is harsh; part of it consumes a lot of energy

[0004] Constant current deposition is a popular technology in recent years. Constant current deposition is a method of passing a constant current in a solution containing deposited metal ions to discharge positively charged cations on the cathode to obtain the target product. Electrodeposition technology, and the research on preparing copper-nickel alloy protective film layer by constant current deposition is still in its infancy. In addition, a defect of electrodeposition is that the generation of hydrogen gas makes the film layer appear to a certain extent, which greatly limits its application in engineering. Applications

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