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

Abstract

The invention relates to a hydrogen-resistant coating based on the inner surface of hydrogen storage and transportation equipment and a preparation method. The preparation method comprises the following steps: S10, grinding and polishing the surface of a matrix step by step, cleaning and air-drying, and injecting and depositing catalytic metal ions on the surface of the matrix through a PIII&D deposition technology to obtain a deposited catalytic metal layer and an injection layer which are sequentially stacked from bottom to top; and S11, growing a graphene coating on the surface of the injection layer in situ by adopting a PECVD method. According to the invention, the prepared graphene coating is high in binding force with a film substrate and good in hydrogen resistance effect, low-temperature normal-pressure large-area preparation can be better achieved, the production cost is reduced, uniform deposition can be achieved on the inner surface and the outer surface of a workpiece, and the method is suitable for industrial preparation of the graphene coating on the inner surface of hydrogen storage and transportation equipment.

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 is known as the ultimate energy source with the most development potential in the 21st century because of its high calorific value, wide source, pollution-free, renewable and many other advantages. The construction of hydrogen infrastructure such as hydrogen storage tanks and hydrogen pipelines has become a national Important strategic deployment of hydrogen energy. However, these hydrogen storage and transportation equipment have been serving in a high-pressure hydrogen environment for a long time, and there is a risk of hydrogen leakage or even explosion caused by hydrogen embrittlement of materials, which is a major obstacle hindering the development of hydrogen energy. It is...

AI Technical Summary

Problems solved by technology

[0004] However, the graphene coating prepared by CVD method can only be grown on the surface of special catalytic metals such as Ni, Cu, Co, etc., and the traditional CVD coating preparation often requires a high temperature greater than 1000 ° C, which may affect the substrate material (such as stainless steel) itself. The structural performance of the substrate is affected, which greatly limits the selection of substrate materials.

There are also researchers who peel off the graphene coating obtained by CVD from the original substrate to the target substrate for application. This method cannot be directly prepared on the inner wall of the tank or pipeline, and the production efficiency is very low, and the cost of stripping is high. The use of acid It will also pollute the environment and is not suitable for the industrial large-scale preparation of the inner surface coating of hydrogen storage and transportation equipment

Images