Effects of Temperature on Galvanic Corrosion Behaviors of Super 13Cr and P110 Steel Couples in NaCl Solution

Yao, Xiao Fei; Wei, Tian; Wu, Lei

doi:10.4028/www.scientific.net/amr.1033-1034.829

Cited by 7 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thereby reducing the protective effect of the corrosion product film on the surface of the metal electrode. In addition, Fe(OH) 2 in the corrosion product is a porous deposited layer with a large porosity and poor anodic solubility protection for metals [29]. The loose corrosion product layer will be penetrated by the aggressive ions such as Cl − and HCO 3− present in the three simulated solutions, eroding the surface of the electrode, changing the chemical products on the surface and continuing the chemical reaction.…”

Section: Experimental Results and Analysismentioning

confidence: 99%

Galvanic corrosion behaviour and mechanism of skin effect heat tracing pipes

Xie

Wang

et al. 2019

Corrosion Engineering, Science and Technology

View full text Add to dashboard Cite

Skin effect electric heat tracing plays an extremely important role in heavy oil transportation because of its high heating efficiency and strong applicability. However, the heat tracing tube often has corrosion failure problems, which threaten the safe operation of the pipeline. We use the weight loss method, potentiodynamic polarisation, combined with SEM and EDS to study the corrosion mechanism of the heat tracing pipe and main pipe under the skin effect. The research results show that the main type of corrosion of the heat tracing pipes in the Liaohe Teshi pipeline is galvanic corrosion. When the two are connected, the main line X52 is protected as a cathode, and the heat treating tube 20# steel is accelerated as an anode.

show abstract

Section: Experimental Results and Analysismentioning

confidence: 99%

Galvanic corrosion behaviour and mechanism of skin effect heat tracing pipes

Xie

Wang

et al. 2019

Corrosion Engineering, Science and Technology

View full text Add to dashboard Cite

show abstract

“…Li et al [11] studied the galvanic corrosion between N80 carbon steel and 13Cr stainless steel under supercritical CO 2 conditions via electrochemical measurements and surface characterization and found that the corrosion of N80 carbon steel was enhanced via coupling with 13Cr stainless steel, and the galvanic current decreases with time due to the formation of a protective FeCO 3 film. Yao et al [12] studied the galvanic corrosion behavior of a Super 13Cr-P110 steel pair in a NaCl solution via the electrochemical method and found that the galvanic current density generated by the pair would cause serious galvanic corrosion, and the corrosion product was oxide. Wang et al [13] studied the inhibition effect of a corrosion inhibitor on the galvanic corrosion of N80 carbon steel and 13Cr stainless steel under dynamic supercritical CO 2 conditions and found that inhibitors could effectively inhibit the galvanic corrosion of N80 carbon steel, but the galvanic effect decreases the inhibitive effect of the inhibitors for N80 carbon steel.…”

Section: Introductionmentioning

confidence: 99%

Study on the Galvanic Corrosion between 13Cr Alloy Tubing and Downhole Tools of 9Cr and P110: Experimental Investigation and Numerical Simulation

Zang

Jiang

et al. 2023

Coatings

View full text Add to dashboard Cite

The galvanic corrosion of oil and gas production string is related to wellbore integrity and production safety. In order to study the galvanic corrosion of an oil and gas well tubing assembly and maintain production safety, this paper studied the galvanic corrosion behavior between 13Cr alloy steel tubing and the downhole tools of 9Cr and P110 in formate annular fluid via experimental and numerical simulation methods. The chemical composition, HTHP corrosion tests and electrochemical measurement of the three materials were investigated to analyze the corrosion mechanism and electrochemical parameters. Then, a full-sized 3D galvanic corrosion model of 13Cr tubing and a 9Cr/P110 joint combination was established using COMSOL Multiphysics software based on the electrochemical test results. The mechanism and current variation law of the galvanic corrosion of different tubing materials are discussed and analyzed in the paper. The results revealed that the corrosion rates obtained based on the electrochemical test are as follows: P110 (0.072 mm/y) > 9Cr (0.033 mm/y) > 13Cr (0.0022 mm/y). The current densities of a combination of 13Cr tubing with a 9Cr joint and 13Cr tubing with a P110 joint vary dramatically: the current density of the 13Cr tubing–P110 joint reach 1.6 × 10−4 A/cm2, higher than the current density of the combination of 13Cr tubing and a 9Cr joint. The results of a 3D FEM analysis show that the 13Cr tube demonstrates obvious galvanic corrosion with 9Cr and P110 joints, which is consistent with the analysis results of the polarization curve. This study therefore explains the galvanic corrosion mechanism of different tubing materials and provides guidance for the safe use of tubing in the productive process.

show abstract

“…Grade D and grade H highstrength sucker rods are widely used in oil production engineering due to their excellent mechanical properties and bearing capacity [2,3]. However, in their actual application in oil wells, the produced water reinjection in the middle and late period of the oil field causes an increase in the water content and the salinity of the well fluid, the working environment of the sucker rod worsens, and the corrosion failure of the sucker rod under variable tensile stress becomes increasingly serious, making the service life of the high-strength sucker rod generally shorter than its expected life [4][5][6][7][8][9][10]. At present, the used pumping rod is designed according to the requirements of an SY/T5029-2006 sucker rod [11].…”

Section: Introductionmentioning

confidence: 99%

Study on Variable Stress Corrosion Susceptibility of Four Typical High-Strength Sucker Rods in High-Salinity Well Fluids

Zhang,

Li,

Zhu

et al. 2023

Processes

View full text Add to dashboard Cite

To study the corrosion characteristics of high-strength sucker rods in high-salinity well fluids under alternating stresses, a single-factor stress corrosion test was designed. The slow strain rate tensile test (SSRT) was carried out for four kinds of high-strength sucker rods under different Cl− and HCO3− concentrations and with different service strengths, and the variable stress corrosion cracking susceptibility was analyzed. The results show that the elongation loss and absorbed work loss of the H-grade ultra-high-strength 4330 sucker rod after stress corrosion are greater than those of both the high-strength 4142 sucker rod and the high-strength 20CrMoA sucker rod. The elongation and absorbed work loss of the 30CrMoA and 20CrMoA sucker rods are less affected by the changes in Cl− and HCO3−. With the increase in use strength, the elongation and absorbed work loss of the high-strength sucker rod increase. The change in the surface of the sucker rod during the corrosion process is inconsistent with the actual elongation of the sucker rod and the absorbed work loss. It can be concluded that the stress corrosion cracking susceptibility of the sucker rod is not necessarily related to the tensile strength of the sucker rod. The 4330 sucker rod is not suitable for applications in wells with a high concentration of Cl−, but it is suitable for operation in alkaline conditions where corrosive media such as HCO3− and Cl− coexist. Under highly corrosive and highly mineralized conditions, the 30CrMoA sucker rod is less susceptible to stress corrosion. The stress corrosion cracking susceptibility of the 20CrMoA sucker rod is lower than that of the 4142 sucker rod. In high-salinity well fluids, the higher the use strength, the higher the stress corrosion cracking susceptibility of the high-strength sucker rod is. The test results for the weight-loss-based corrosion rate and plastic loss may contradict the determination of the corrosion susceptibility of the material under working conditions.

show abstract

Effects of Temperature on Galvanic Corrosion Behaviors of Super 13Cr and P110 Steel Couples in NaCl Solution

Cited by 7 publications

References 9 publications

Galvanic corrosion behaviour and mechanism of skin effect heat tracing pipes

Galvanic corrosion behaviour and mechanism of skin effect heat tracing pipes

Study on the Galvanic Corrosion between 13Cr Alloy Tubing and Downhole Tools of 9Cr and P110: Experimental Investigation and Numerical Simulation

Study on Variable Stress Corrosion Susceptibility of Four Typical High-Strength Sucker Rods in High-Salinity Well Fluids

Contact Info

Product

Resources

About