Operating method of a thermal device supplied with aluminium- and titanium-based compounds to reduce corrosion and clogging at high temperatures.

A thermal equipment comprising fuel and oxidizer is fed with fluids during the operation. The fluids contain alkali metal, lead, alkaline earth metal or transition metal and aluminum and titanium. The titanium mass fraction is 0.1 or more and is calculated from the ratio of titanium mass concentration with respect to sum total of titanium mass concentration and aluminum mass concentration. An independent claim is included for method for protecting hot components of thermal equipment.