LinkedIn·Wednesday, 12 August 2026·14d ago

𝗕𝗿𝗲𝗮𝗸𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝗦𝘂𝗽𝗲𝗿 𝗦𝘁𝗲𝗲𝗹 𝗖𝗼𝘂𝗹𝗱 𝗦𝗹𝗮𝘀𝗵 𝗚𝗿𝗲𝗲𝗻 𝗛𝘆𝗱𝗿𝗼𝗴𝗲𝗻 𝗖𝗼𝘀𝘁𝘀 Researchers at the University…

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𝗕𝗿𝗲𝗮𝗸𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝗦𝘂𝗽𝗲𝗿 𝗦𝘁𝗲𝗲𝗹 𝗖𝗼𝘂𝗹𝗱 𝗦𝗹𝗮𝘀𝗵 𝗚𝗿𝗲𝗲𝗻 𝗛𝘆𝗱𝗿𝗼𝗴𝗲𝗻 𝗖𝗼𝘀𝘁𝘀 Researchers at the University of Hong Kong have developed a new stainless steel (SS-H2) capable of withstanding extreme seawater corrosion at high electrical potentials. Published in Materials Today, the breakthrough overcomes a century-old limit of conventional stainless steel, paving the way for significantly cheaper green hydrogen production from seawater. 𝗢𝘃𝗲𝗿𝗰𝗼𝗺𝗶𝗻𝗴 𝘁𝗵𝗲 𝗧𝗿𝗮𝗻𝘀𝗽𝗮𝘀𝘀𝗶𝘃𝗲 𝗖𝗼𝗿𝗿𝗼𝘀𝗶𝗼𝗻 𝗟𝗶𝗺𝗶𝘁 Traditional stainless steel relies on a chromium oxide layer that breaks down around 1000 mV, well below the 1600 mV potential required for water oxidation. By implementing a sequential dual-passivation strategy, the HKU team created a secondary protective layer based on manganese. This allows the material to withstand aggressive chloride environments at potentials up to 1700 mV. 𝗦𝗹𝗮𝘀𝗵𝗶𝗻𝗴 𝗠𝗮𝘁𝗲𝗿𝗶𝗮𝗹 𝗖𝗼𝘀𝘁𝘀 𝗙𝗼𝗿𝘁𝘆-𝗙𝗼𝗹𝗱 In salt water electrolyzers, SS-H2 matches the performance of expensive gold- or platinum-coated titanium components at a fraction of the price. Estimates suggest the material could reduce structural component costs by up to 40 times. The team has already produced tons of SS-H2 wire in collaboration with industrial partners as they work toward commercial deployment. https://lnkd.in/ehiVzAqf

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