New Insights into Hydrogen Embrittlement in Additively Manufactured Metals: A Critical Review for the Hydrogen Industry

In the rapidly evolving landscape of the hydrogen sector, the intersection of additively manufactured (AM) metals and hydrogen embrittlement (HE) emerges as a critical area of focus. The implications for industries reliant on these cutting-edge materials, particularly in hydrogen transportation and storage, are profound.

A recent comprehensive critical review paper sheds light on this vital issue, exploring the intricate effects of HE on AM alloys. This investigation is not just timely but essential, as it dives into the microstructural dynamics influencing HE, along with hydrogen-induced crack initiation (HICI) and propagation processes in these materials.

The novelty of this review lies in its systematic approach to categorising the microstructural behaviours and their consequential roles in HE phenomena within commonly used AM alloys. By offering an overview of the latest research and introducing a classification scheme for HE mechanisms, this paper marks a significant stride towards understanding the multifaceted relationship between AM technologies and hydrogen sustainability.

Key highlights from this critical review include:

• The pivotal role of microstructure in determining the susceptibility of AM metals to HE and HICI.
• A detailed analysis of HE mechanisms in various AM alloys, including titanium, nickel superalloys, and austenitic stainless steel, in hydrogen-rich environments.
• Recommendations for the design and development of new AM alloys, enhancing their safety and effectiveness in hydrogen-based applications.

Conclusion

The paper again highlights the challenges the hydrogen sector faces with embrittlement and hydrogen-induced crack initiation. However, there is an alternative solution. The problem can be mitigated using the Tritonex Hydrogen Barrier Coating System (HBCS) , which can be applied to any metal or substrate to prevent hydrogen embrittlement. 

Tritonex HBCS stands out for its unique composition and properties. It acts like ordinary paint but has extraordinary properties. It contains a revolutionary nano-ingredient that makes the barrier coating 100% impermeable to hydrogen, as certified by ISO 17081: 2014. This electrically inert, chemically resistant coating also completely halts corrosion, a feat not seen in any other product to date. 

At Triton Hydrogen we are positioned to support a better, more sustainable future by removing costs across the entire hydrogen value chain, while improving safety and efficiency.

HE and HIIC are problems that are not going away, and we need solutions today.

I'm keen to hear your thoughts.

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