Hydrogen-preventing coating based on inner surface of hydrogen storage device and preparation method

Abstract

The invention relates to a hydrogen-preventing coating based on the inner surface of a hydrogen storage device and a preparation method. The preparation method comprises the following steps of S10, after grinding and polishing the surface of a matrix step by step and cleaning and air-drying the surface of the matrix, injecting depositing Ni ions to the surface of the matrix by a PIII and D deposition technology to obtain a depositing Ni layer and an injection layer which are successively laminated from bottom to top; S11, injecting C ions uniformly to the surface of the injection layer to obtain an injecting C layer rich in C ions; and S12, annealing a sample forming the injecting C layer, wherein the surface of the injecting C layer is segregated to grow a graphene coating. The technicalscheme provided by the invention is high in operability and good in controllability. The bonding strength between the graphene coating and the matrix prepared by the method is high, and the graphene coating is good in hydrogen-preventing performance. By controlling the injection amount of C ions, the thickness of the graphene coating can be controlled. The hydrogen-preventing coating is high in technical realizability and is suitable for a structural material where graphene cannot grow on the surface directly.

Description

technical field [0001] The invention relates to the technical field of material surface treatment, in particular to a hydrogen-resistant coating based on the inner surface of hydrogen storage and transportation equipment and a preparation method thereof. Background technique [0002] Hydrogen energy has many advantages that traditional energy sources do not possess, such as high combustion calorific value and no pollution. It is currently a very effective method to prevent or delay hydrogen permeation and improve the hydrogen embrittlement resistance of steel by covering a layer of hydrogen barrier coating on the surface of steel. [0003] In recent years, the application of two-dimensional materials such as graphene in hydrogen barrier coatings has gradually attracted the attention of researchers. Graphene has unique two-dimensional characteristics. Experimental and theoretical studies have shown that perfect graphene flakes are impermeable to standard gases, and the dense...

AI Technical Summary

Problems solved by technology

[0004] However, at present, it is still difficult to directly grow graphene coatings on the surface of hydrogen energy equipment such as stainless steel and pipeline steel. Prepared on the inner surface of containers or pipes and surfaces with complex shapes, it cannot be used for large-scale industrial production and application

In addition, it is costly to separate graphene grown by CVD from the copper-nickel surface, the use of a large amount of acid will pollute the environment, and graphene may generate new defects during the transfer process, resulting in a decrease in hydrogen barrier properties.

Some scholars also use spin coating, electroplating, etc. to directly deposit graphene coatings on stainless steel surfaces, but such coatings have poor adhesion, may peel off, and are prone to failure during service

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