Prediction of chemical effects of Mo and B on the Cs chemisorption onto stainless steel

Chemical effects of Mo and B on the Cs chemisorption onto stainless steel (SS) were predicted using a chemical equilibrium calculation based on an assumed model. A step reaction model for the Cs chemisorption process considering surface oxide layer formed on SS was assumed based on a literature review. Resultant major Cs compounds by Cs chemisorption were calculated for the two types of SS having different oxide surface layer structures. It is seen that Mo has induced the formation of Cs₂MoO₄ as a major Cs compound. On the other hand, little effects were observed for B. Cs-Si-O compounds were major resultant compounds regardless of Mo or B existence, indicating the stability of Cs-Si-O compounds. The results suggest that Cs-Mo-O in addition to Cs-Si-O compounds should be considered for further investigation on Cs chemisorption.