HKU team develops super steel for corrosion-resistant seawater hydrogen production
Updated
Updated · ScienceDaily · May 10
HKU team develops super steel for corrosion-resistant seawater hydrogen production
10 articles · Updated · ScienceDaily · May 10
The SS-H2 alloy, led by Professor Mingxin Huang, withstands up to 1700 mV and could cut structural material costs about 40-fold in a 10MW PEM electrolyser system.
Researchers said the steel uses a sequential dual-passivation mechanism, adding a manganese-based protective layer over chromium oxide to survive chloride-rich, high-voltage conditions that defeat conventional stainless steel.
Published in Materials Today, the work has yielded patents and pilot wire production in mainland China, though engineers still must turn the material into commercial meshes and foams for industrial electrolysers.
Could a revolutionary 'super steel' finally make clean hydrogen cheaper than fossil fuels?
How did scientists turn a metallic weakness into an unbreakable shield for clean energy?
SS-H2: Manganese-Driven Stainless Steel Revolutionizes Seawater Hydrogen Production and Industrial Electrolyzers
Overview
The University of Hong Kong has developed SS-H2, a novel stainless steel designed to solve major challenges in hydrogen production from seawater. Unlike traditional stainless steels, which suffer from corrosion and high costs due to the breakdown of their chromium-based protective layers under high electrical potentials, SS-H2 uses a unique manganese-based mechanism to greatly improve corrosion resistance and durability. This breakthrough makes hydrogen production more affordable and reliable, paving the way for wider adoption of hydrogen as a clean energy source and overcoming key barriers that have limited the industry’s growth.