Special Oil & Gas Reservoirs ›› 2021, Vol. 28 ›› Issue (4): 158-163.DOI: 10.3969/j.issn.1006-6535.2021.04.022

• Drilling & Production Engineering • Previous Articles     Next Articles

Study on Preparation of NiW-Si3N4/MWCNTs Composite Coating by Pulse Electrodeposition and Its Performance

Zhang Wei1, Li Bengang2, Long Xiongyun1, Jing Wenjie1, Zhu Mingzhao1, Li Hongjie3, Zhang Weigang4, He Teng3   

  1. 1. PetroChina Changqing Oilfield Company, Yinchuan, Ningxia 750003, China;
    2. PetroChina Changqing Oilfield Company, Wuzhong, Ningxia 751506, China;
    3. Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    4. Northeast Petroleum University, Daqing, Heilongjiang 163318, China
  • Received:2020-09-19 Revised:2021-06-01 Published:2022-02-18

Abstract: It is prone to corrosion for the steel surface of tubing and casing exposed to complex working conditions for a long time, leading to a reduction in the service life of the material and impact on the production of oil wells. NiW-Si3N4/MCNTs composite coating was prepared on the surface of C45 steel substrate by pulse electrodeposition technology, and the influence of the amount of nano-particles Si3N4 and MWCNTs used on the surface micromorphology, hardness and corrosion resistance of the composite coating was explored. It was found in the study that nano-particles added could inhibit the growth of the (220) and (200) crystal planes of the Ni-W coating, and promoted the crystal particle refinement of the Ni-W coating, greatly enhancing the microhardness (up to 1 243.7 HV) of NiW-Si3N4/MCNTs composite coating; compared with Ni-W coating, NiW-Si3N4/MCNTs composite coating was higher in resistance, lower in corrosion rate and better in corrosion resistance. The study laid a theoretical foundation for further enhancement of physico-chemical properties of Ni-W plating and reduction of tubing corrosion.

Key words: pulse electrodeposition, NiW-Si3N4/MWCNTs composite coating, microhardness, corrosion resistance

CLC Number: