High-Pressure Hydrogen Storage Container Coating for Embrittlement Resistance
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Solution Overview
Problem
Hydrogen embrittlement phenomenon in high-pressure hydrogen storage containers reduces airtightness and shortens lifespan due to hydrogen penetration and material oxidation.
Innovation Solution
A high-pressure fluid storage container with a surface-treated embrittlement-resistant layer formed on the plug coupling portion and end plug, using chromium-containing steel, and a sealing unit to enhance sealability and prevent hydrogen embrittlement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If hydrogen storage containers are continuously exposed to high-pressure hydrogen gas environment, then hydrogen storage function is achieved, but hydrogen embrittlement occurs where hydrogen penetrates the steel material decreasing its physical properties
Solution Approach 1:
The invention applies a composite coating structure consisting of multiple layers (oxide layer, intermediate layer, and outer layer) on the steel container surface. This composite material structure prevents hydrogen penetration while maintaining storage capacity, resolving the contradiction between hydrogen storage function and resistance to hydrogen embrittlement.
Solution Approach 2:
The oxide layer formed on the steel surface creates an inert barrier that prevents direct contact between hydrogen and the steel material. This inert environment at the interface protects the steel from hydrogen embrittlement while allowing the container to maintain its hydrogen storage capability.
2Strength
If steel material is used for container body, then structural strength is achieved, but oxidation and hydrogen embrittlement occur reducing lifespan
Solution Approach 1:
The oxide layer created on the steel surface forms a protective barrier that isolates the steel from oxidizing environments. This inert protective layer prevents both oxidation and hydrogen embrittlement, thereby extending the lifespan of the steel container while maintaining its structural strength.
Solution Approach 2:
The multi-layer coating system combines different materials with complementary properties: the oxide layer provides oxidation resistance, the intermediate layer provides adhesion and transition, and the outer layer provides additional protection. This composite structure protects the steel substrate from degradation while preserving its mechanical properties.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution improves airtightness and enables long-term use by preventing material oxidation and hydrogen penetration, thereby extending the lifespan of the storage container.
Implementation Method 1
a surface-treated embrittlement-resistant layer is formed in an area where at least the plug coupling portion and the end plug come into contact with each other, to prevent oxidation and hydrogen embrittlement
Implementation Method 2
there is a problem of hydrogen embrittlement phenomenon occurring where hydrogen penetrates the steel material constituting the container, decreasing its physical properties
Implementation Method 3
a compression spring formed of a metal material, inserted into the insertion space, and providing an elastic compression force on both sides with the open portion of the insertion space as the center, thereby causing the sealing jacket to adhere to the end face of the container body and the opposing face of the end plug
Data Source
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AI summary
Provided herein is a high-pressure fluid storage container with oxidation resistance/hydrogen embrittlement resistance through surface treatment.