Hydrogen Storage Container Surface Treatment 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 chromium-containing steel components, using a process involving atmospheric heating and hydrogen atmosphere heating to form a protective layer, combined with a sealing unit for enhanced sealability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high-pressure hydrogen gas is stored continuously, then storage capacity is improved, but hydrogen embrittlement occurs reducing airtightness and lifespan
Solution Approach 1:
An embrittlement-resistant layer is formed on the plug coupling portion and end plug through preliminary surface treatment processes (atmospheric heating at 600-900°C followed by hydrogen atmosphere heating at 1000-1200°C with controlled water vapor pressure). This preventive measure is applied before the containers are put into service, proactively protecting against hydrogen embrittlement and oxidation that would occur during continuous high-pressure hydrogen storage, thereby maintaining airtightness and extending lifespan while preserving storage capacity
2Strength
If steel material is used for container construction, then strength is improved, but oxidation and hydrogen penetration occur
Solution Approach 1:
The invention creates a composite structure by forming an embrittlement-resistant layer on the steel surface through controlled heating processes. The layer comprises oxide and hydroxide compounds that form a protective barrier over the chromium-containing steel substrate. This composite material system combines the high strength of steel with the oxidation and hydrogen resistance of the surface layer, eliminating the need to choose between strength and resistance to harmful factors
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
Prevents material oxidation and hydrogen penetration, improving airtightness and enabling long-term use 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
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 3
injecting air into the chamber and primarily heating the plug coupling portion and the end plug under atmospheric conditions
Implementation Method 4
injecting hydrogen into the chamber and secondarily heating the plug coupling portion and the end plug under a hydrogen atmosphere
Data Source
AI summary
Provided herein is a high-pressure fluid storage container with oxidation resistance/hydrogen embrittlement resistance through surface treatment.