Application of Hot-dipping Aluminide in Preparing Tritium Permeation Barrier

The tritium permeation is urgent problem to be solved in the test blanket module (TBM) tritium system.The preparation methods of aluminide coatings and the mechanism of tritium permeation barrier (TPB) are presented.The microstructure formation mechanism and application in TPB of hot-dipped aluminum(HDA) are introduced.The HDA is a potential technology for preparing TPB on stainless steels due to its high permeation reduction factor (PRF) and being applicable for huge and complicated workpieces.