Optimization of insulating coating formation technology on the structural materials for heavy liquid metal coolants

Development of liquid metals as coolants for blankets and diverters of tokamaks can lead us to choose coolant with higher safety standards than lithium. Heavy liquid metal coolants ensure higher safety of energy installations. Heavy liquid metal coolants facilitate formation of oxygen based electroinsulating coatings and maintain their stability. Conclusions of the most effective methods of electroinsulating coating formation are based on results of direct measure of magnetohydrodynamic resistance of different heavy liquid metal coolants. It has been proven experimentally that value of magnetohydrodynamic resistance to heavy liquid metal flow in round steel ducts with electroinsulating coatings in a transverse magnetic field is between the theoretical values for electroconductive walls and fully nonconducting walls. Electroinsulating coatings created in heavy liquid metal coolants are able to decrease the value of magnetohydrodynamic resistance by more than 5–10 times (depending on the coolant).