The corrosion test of the materials for the product Hydrogen energy

Hydrogen which can be produced by a steam reforming, a hydrolysis of water via a thermochemical water splitting will be one of the promising major secondary energy sources in the near future. Hydrogen can be stored and transported for a long distance with a lower loss when compared to electricity. Iodine Sulfur thermochemical water splitting process(IS process) can produce a large amount of hydrogen effectively without an emission of greenhouse gases such as carbon dioxide by using a high temperature nuclear energy as a heat source with an expected process thermal efficiency of 40∼50%. In order to establish a small scale IS process system, materials for each component in the IS process should be selected and qualified under environments where each component can be operated for a long time. Considering that the IS process is operated under very severe environments of iodic and sulfuric acids at a wide temperature range from room temperature to 900 .deg. C, material corrosion must be an important issue for an accomplishment of a successful IS process. Especially, a corrosion resistant material applicable to highly concentrated sulfuric acid of a high temperature should be found. Therefore, the present work is focused on the corrosion behavior of some commercial materials and fabricated materials in boiling sulfuric acid