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SS-H2 can operate in seawater at voltages of up to 1700 mV, well above the stable operating range of regular stainless steel. The report said this improved performance could help address corrosion and durability issues in seawater electrolysis systems, suggesting expanding potential for advanced stainless steel in hydrogen equipment applications.

A research team at the University of Hong Kong has developed a new stainless steel called SS-H2 for seawater-based hydrogen production systems. The reports said the material is designed to maintain stronger corrosion resistance under harsh, high-voltage operating conditions and could potentially replace more expensive titanium components now used in electrolyzers. The development is seen as a possible new materials route for lowering the cost of green hydrogen equipment.