Скачать или смотреть Tech Talk - Hydrogen Under Pressure: Failure Analysis & Hydrogen Safety Testing - Malke Hyfindr

In this Hyfindr Tech Talk, Ralph Malke, an expert in failure analysis and material science from DEKRA, discusses what it means for materials to be 'H2 ready.' We explore common applications of hydrogen, such as in gas burners, power plants, and automobiles, and delve deeply into hydrogen embrittlement—a phenomenon where hydrogen atoms cause internal stresses in materials leading to brittleness. Ralph explains the molecular processes that occur when hydrogen interacts with materials, highlighting the effects on different lattice structures and the importance of proper material testing. They also discuss the concept of leak tightness in hydrogen applications, different testing methodologies, and the importance of universal testing standards. As they explain, to achieve an 'H2 ready' certification, DEKRA conducts comprehensive tests and provides seals of approval for materials and components that meet rigorous safety standards. The episode underscores the need for standardized tests to ensure safety and reliability in hydrogen technologies.

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Chapters:
00:00 Intro
00:30 Welcome, Ralph Malke
01:13 Applications of Hydrogen
02:43 Hydrogen Interaction with Materials
04:37 Hydrogen Embrittlement Explained
14:59 Testing Material Strength
22:52 Leak Tightness in Hydrogen Systems
24:43 Understanding Bubble Rates and Pipeline Leakage
25:54 Calculating Leak Tightness in Pipelines
28:49 Material Considerations for Hydrogen Storage
34:36 Testing and Certification for Hydrogen Applications
45:13 Future of Hydrogen Standards and Testing

Executive Summary of Tech Talk Script:
In this episode of Hyfindr Tech Talk we speak with Dr. Ralph Malke, an expert in failure analysis and a PhD holder in material science from DEKRA, a company with a century of experience in ensuring material safety. We delve into the concept of 'H2 ready' - materials and components that are designed and tested to handle hydrogen conditions without compromising safety or performance.

The discussion begins with an explanation of where hydrogen-ready materials can be found, such as gas burners in households and potential future uses in transport, power plants, and industrial applications. Dr. Malke explains the phenomenon of hydrogen embrittlement, where hydrogen atoms diffuse into materials, particularly metals, causing them to become brittle and prone to stress and fracture due to internal molecular changes. This is contrasted with the typical understanding of hydrogen presence in molecular form (H2) and its transformation into atomic form (H), which poses a greater risk.

Dr. Malke also illustrates the challenges of ensuring materials remain leak-tight under hydrogen exposure. He explains the importance of different lattice structures in metals and how they impact hydrogen diffusion. Different structures such as ferritic, martensitic, and austenitic configurations respond differently to hydrogen exposure, affecting their integrity and practical applications.

The conversation moves to testing for hydrogen compatibility. DEKRA conducts extensive tests, such as tensile strength tests under hydrogen conditions, to evaluate the impact of hydrogen on materials. These tests help identify internal stresses and the potential for early failure due to embrittlement. This includes demonstrating specific examples such as tensile tests showing reduced plasticity in aged samples compared to new ones.

Interview partner: Ralph Malke (Dekra)

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