Research on Chromium Plating Process of Crank Pin

Wang, Yong-xie; Wang, Tingjun

doi:10.12783/dtetr/ecar2018/26349

Cited by 1 publication

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“…1 shows that the corrosion is local, with the corrosion pit appearing at the top of the screw rotor's spiral line. Because of its direct contact with mud and meshing with the stator during operation, the rotor is prone to corrosion and wear [3] . According to the findings of Zhang et al, screw drilling experienced fatigue, abrasive, and tribo-corrosion wears under water and mud conditions [4] .…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of Double Chromium Plating to Improve Corrosion Performance of Screw Drilling in Chloride Environment

Zhao,

Liu,

Gao

et al. 2023

J. Phys.: Conf. Ser.

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To adapt to and satisfy rising energy demand, oil and gas exploration and production are gradually spreading to locations with poor underground conditions, and the demand for screw drilling instruments is rising as well. When underground drilling tool materials are subjected to these harsh operating circumstances, they corrode severely and may even cause drill pipe breakage and blowout incidents. Failure due to corrosion is still the most common type of failure, with drilling fluid being the leading cause of downhole drilling tool corrosion and equipment damage, particularly in high-temperature and high-pressure working conditions with higher corrosiveness, which must be avoided and controlled. Double chromium was successfully plated on the surface of the screw rotor using the electrodeposition method to extend the service life of screw drilling instruments. Electrochemical methods such as scanning electron microscopy, open circuit potential, electrochemical impedance spectroscopy, and potentiodynamic polarization curve were used to analyze the plating’s morphology and corrosion resistance. The research results show that at high chloride concentrations (50g/L∼100g/L), when the chloride ion concentration is 60g/L, corrosion resistance is the lowest, and that double chromium plating enhances threaded drilling tool corrosion resistance. The dual chromium plating’s polarization resistance has been enhanced by 18 times. The double chrome plated milky white chrome plating functions as a physical barrier to prevent corrosive substances from diffusing to the substrate interface, corrosive ions from reaching the substrate, and considerably improving the screw rotor’s anti pitting performance.

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Section: Introductionmentioning

confidence: 99%