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Study on the Corrosive and Tribological Behavior of the Coating of Several Thermo-chemical in the Oil-well Output Liquid

Author: FanZuo
Tutor: LiJian；WuYong
School: Research Institute of Mechanical
Course: Materials Science
Keywords: Oil Well Tubing Infiltration of zinc Nitriding Wear and tear Corrosion The Nitriding zinc combined treatment
CLC: TG156.8
Type: Master's thesis
Year: 2009
Downloads: 39
Quote: 1
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Abstract

With the continuous development of our oilfield production and oilfield wells produced fluid water content increased, the increasingly serious problem of corrosion in rod pump oil production process tube and rod mill, and greater interaction between corrosion and wear on rod pump oil production hazards caused enormous direct and indirect economic losses. Pumping tubing material for use in the actual production of material corrosion and wear resistance of the role based on the depth of infiltration of zinc process through tribology test, electrochemical test and microstructure analysis, experimental study of seepage Zinc, Nitriding Nitriding N80 Steel in corrosion science and tribological properties of different water content in the produced fluid zinc composite process; investigate the temperature and time factors of N80 the steel sherardizing layer organization and performance the impact of the law, to determine the optimum specification; N80 Steel Nitriding zinc composite process, as well as pumping tubing / rod infiltration of zinc surface nitriding treatment to protect the new technology. The main content of the thesis and major achievements: the infiltration of zinc treatment. N80 steel specimens under different temperature and time parameters to observe the microstructure of the nitrided layer, analysis of the effects of temperature and time of the nitrided layer the impact of the organization, and study the impact of temperature and time of the nitrided layer growth kinetics parameters to determine the process parameters of N80 steel infiltration of zinc. . Nitriding zinc composite process, prepared infiltration infiltration of zinc on the N80 steel composite processing layer; through metallographic analysis to determine the organizational structure Nitriding the zinc composite processing layer. Learn characteristics of the nitrided layer corrosion studies tested the N80, N80 steel steel the infiltration zinc layer, N80 nitrided layer and N80 Nitriding the zinc composite diffusion layer in the produced fluid wastewater Tafel curve, measured various diffusion layer in the wastewater produced fluid from the corrosion potential and corrosion current density. N80 infiltration of zinc, nitriding, and the permeability of the composite diffusion layer in the corrosion potential of the wastewater produced fluid below the corrosion potential of N80 steel, can be used as a sacrificial anode protection N80 matrix. Minimal infiltration of zinc layer corrosion current density, corrosion protective effect of N80 steel. Nitrided layer of the corrosion current density, poor corrosion resistance. 4. Infiltration of zinc, nitriding and N80 steel / GCr15 steel pairs friction and wear properties of composite process. Nitriding infiltration of zinc processing tribological behavior of N80 steel / GCr15 Friction Material, the study found: the wear rate of the infiltration of zinc sample with water content increases with the increase of 75%; infiltration of zinc specimen and its GCr15 sample for grinding in the wear test found no significant corrosion phenomena; the nitrided sample coefficient of friction and wear rate is less than the sherardizing sample, but the high moisture permeability of nitrogen and treated specimens wells the the produced fluid medium wear rate was accelerated increasing trend; Nitriding zinc composite processing sample coefficient of friction and wear rate than the lower infiltration zinc sample; Friction Material N80 infiltration nitrogen the GCr15 bleed zinc processing approach effectively reduce the wear rate of the pumping tubing materials, the wear rate and the wear rate of the nitriding treatment quite low water content, 95% of the water, the wear rate of only 51.2% of the nitriding treatment, infiltration of zinc processing layer may also be in contact with each other Friction Material provided sacrificial anode protection, improve the corrosion resistance, protection for pumping tubing material at high water content.

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