Method for strengthening composite coating by using nano silicon dioxide sol and rare-earth

Abstract

The invention relates to a method which adopts nano silicon dioxide sol and rare earth to strengthen a composite deposite. The method comprises the following main steps: the preparation of a nano sol, the preparation of a plating solution and electroless composite plating, and is characterized in that: the nano SiO2 sol is directly added into the Ni-P chemical plating solution containing rare earth cerous sulfate to carry out plating, obtained nano SiO2 particles in the composite deposite are evenly distributed and the rigidity of the deposite is obviously improved. The method also has the advantages of convenient operation without mechanical stirring during the plating process, low cost, and the like.

Description

technical field

[0001] The invention relates to a method for strengthening composite coating by adopting nano-silica sol and rare earth. Specifically, the present invention improves the overall performance of the coating by adding nano silicon dioxide particles to the nickel-phosphorus electroless coating. technical background

[0002] In recent years, coatings and coatings with many specific functions have been widely used in engineering technology, and have played an irreplaceable role in surface modification and strengthening of materials. There are many ways to prepare coatings and coatings, among which composite coatings based on chemical or electrochemical deposition are widely used in engineering technology. Composite coating refers to adding one or several kinds of insoluble solid particles to the plating solution, so that the solid particles and metal ions are co-deposited to obtain coatings with various physical and chemical properties. The size of the solid part...

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