Pack Boronizing of P110 Oil Casing Tube Steel to Combat Wear and Corrosion

Abstract

In the present work, boronizing coating was produced by pack cementation to improve the surface performance and increase the usage lifetime of P110 oil casing tube steel during operation. Scanning electron microscope (SEM), X-ray diffraction (XRD) and glow discharge optical emission spectroscope (GDOES) were used to investigate the surface morphology, cross-sectional microstructure, phase constitutions and element distribution of the boronizing coating. The wear and corrosion resistance of boronizing coating and P110 steel were evaluated on high speed reciprocating friction tester and electrochemical workstation, respectively. The results showed that the obtained coating was uniform and continuous, mainly consisted of Fe2B and reached a thickness of 20 μm. The the wear and corrosion resistance of the P110 steel can be improved by boronizing coating. In conclusion, the formed coating has significantly improved the surface performance of P110 steel.