The properties and physicochemical interactions in iron–fluor-oligomer systems

We explore the efficiency of fuel pumps by modifying the friction surfaces with fluor-oligomeric films, analyze the peculiarities of interaction between the fluor-oligomer and iron, and investigate the influence of fluor-oligomer on the corrosive properties of iron. After processing the surfaces of precise friction pairs with fluor-oligomer, the average cyclic delivery of fuel pumps increases by up to 18%, and the elevated efficiency persists for 40 hours of operation. The fluor-oligomer lowers wear as compared with the control version, especially at higher rotation speeds. The positive effect is explained by the chemical interaction between iron and the fluoroligomer film as follows from the data obtained by the Mossbauer spectroscopy, the X-ray diffraction analysis, and electrochemical technique. Even extremely thin fluor-oligomeric films (down to 2 μg ⋅ cm – 2 ) may sufficiently improve the corrosion resistance of iron.