Hydrogen barrier coating and preparation method based on inner surface of hydrogen storage and transportation equipment

Abstract

A hydrogen-resistant coating based on the inner surface of hydrogen storage and transportation equipment and its preparation method, the preparation method comprising the following steps: Step S10, after the surface of the substrate is gradually polished and cleaned and air-dried, the surface of the substrate is deposited on the surface of the substrate by PIII&D deposition technology Implanting and depositing Ni ions on top to obtain a deposited Ni layer and an implanted layer sequentially stacked from bottom to top; Step S11, uniformly implanting C ions on the surface of the implanted layer to obtain an implanted C layer rich in C ions; Step S12 , annealing the sample formed with the implanted C layer, so that the surface of the implanted C layer segregates and grows a graphene coating. The technical solution provided by the invention has strong operability and good controllability. The graphene coating prepared by this method has high bonding strength and good hydrogen resistance, and the graphene coating can be controlled by controlling the amount of C ion implantation. The thickness of the layer, the technical feasibility is strong, and it is suitable for structural materials whose surface cannot directly grow graphene.

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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