A method of making a dry film of polyamide-imide having a high resistance to galling of a threaded tubular component from an aqueous dispersion free of carcinogenic substance

The invention relates to a method of making a dry film having high galling resistance of a threaded member for drilling and / or operation of hydrocarbon wells, characterized in that it comprises at least the following steps: the preparation of a stable dispersion comprising a powder of polyamideimide, a polar aprotic solvent with a boiling point above 180 ° C at 760 mmHg, water. applying the dispersion onto one of the ends (1, 2) of the threaded element to a temperature between 20 and 40 ° C drying the coated end.