Electric submersible pumps with built-in mechanical stirrer, made of alloys with a high chromium content, high resistance to mechanical corrosion. Suitable for stirring and pumping thick mixtures of mud, cement-bentonite (well pile cleaning), steel processing residues, bitumen, oils, gravel pumping (dredging of channels & ports), subsea projects and in general where the pumping of corrosive fluids is required.