Application study of nano-copper based composite anti-friction coating for corrosion resistant couplings

The full scale makeup and breakout experiments carried out on the non-API high grade P110S, N80S and TP95TS oil coupling couplings of the AFRICO treated separately showed, that the surfaces of the thread do not appear any obvious galling or scratches. That means the copperized couplings can be replaced by the AFRICO treated couplings in high grade steel corrosion resistant oil-couplings.