Therefore, we performed MC simulations in the osmotic ensemble in order to insert a first electrolyte unit in water, zeolite systems originally equilibrated with a water reservoir at values of pressure that represent saturation uptake: 400 MPa for silicalite-1 and 200 MPa for chabazite. From these starting configurations, Figure reports the histograms of the alchemical work associated with the insertion of a single NaCl pair in various zeolite model containing defects. In this analysis, we discarded both the Silicalite-1 and chabazite models containing respectively 4 and 0.5 strong silanol defects per unit cell, because of their hydrophilic character which does not mimick experimental behavior. For all other zeolite models, we can see that the profile of the alchemical work histogram is similar in both shape, average and extent to the parent defect-free zeolite. This shows that the presence of defects, although it impacts strongly the adsorption of water, has marginal influence on the thermodynamics of electrolyte intrusion.