A groundbreaking stainless steel technology named SS-H2, developed at the University of Hong Kong under Professor Mingxin Huang's leadership, is revolutionizing green hydrogen production. This innovation offers a cost-effective and corrosion-resistant alternative to current electrolysis systems, potentially reducing material expenses by up to 40 times. SS-H2's dual-layer passivation mechanism, including an innovative manganese-based layer, ensures unprecedented corrosion resistance even in chloride-rich environments, expanding the possibilities for green hydrogen production from sources like seawater. The economic implications of SS-H2 are profound, positioning it as a game-changer for industrial hydrogen production. Companies like Shell, Linde, and Bloom Energy are already incorporating green hydrogen into their operations. SS-H2's application extends beyond hydrogen production to various industries like ammonia production, oil refining, steelmaking, and methanol production, offering cleaner processes and lower emissions. Professor Huang's team's dedication to material science has led to transformative innovations, with SS-H2 poised to drive down costs and emissions in the global transition to sustainable energy. The material's transition from the laboratory to industry marks a significant step towards large-scale applications, highlighting its potential to shape a more sustainable energy future by addressing urgent global challenges.