Influence of Turbulent Flow on the Localized Corrosion Process of Mild Steel with Inhibited Aqueous Carbon Dioxide Systems

Mora-Mendoza, José Luis; Chacón-Nava, J.G.; Olivares, Gerardo Zavala; González-Núñez, M. A.; Turgoose, S.

doi:10.5006/1.3277652

Cited by 37 publications

(16 citation statements)

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“…Temperature, one of the most important factors influencing H2S/CO 2 corrosion, mainly affected the corrosion performance by increasing chemical reaction rate and influencing the generation and status of the corrosion scales [13][14] .…”

Section: Microanalysis Of Corrosion Scalesmentioning

confidence: 99%

Corrosion Assessment of Different Production Casings and Material Selection in Sour Gas Wells

Zeng

Zhang

Wang

et al. 2015

SPE/IATMI Asia Pacific Oil &Amp; Gas Conference and Exhibition

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In order to assess the applicability of three steel specimens (T95, 110SS-2Cr and 825 steel) in sour gas well, corrosion tests were conducted in a simulated gas field solution containing both 0.55MPa H 2 S and 0.75MPa CO 2 at 55°C-100°C for 72h in an autoclave. Then the corresponding corrosion products were analyzed and compared through EDS and SEM technologies. The stress corrosion cracking (SCC) behavior of three steel specimens had been tested using four point bending (FPB) technique and constant-load test. The results showed that the 825 steel had lowest corrosion rate among all those steels. The corrosion rate of T95 steel was higher than 110SS-2Cr steel for its looser corrosion products. With the increase of temperature, T95 steel and 110SS-2Cr steel corrosion product film thickened, and the trends of crystallization and agglomeration were clear. The main components of the film were FexSy, FeCO 3 and compounds containing a small amount of Cr. It could also be found that the Cr content of 110SS-2Cr steel corrosion products was higher than that of T95 steel, which may contribute to its lower corrosion rate. According to the FPB results, all of those three steels did not get broken under 85% stress state in the simulated field condition. The constant load tests also showed that under 72% stress state, the T95 steel and 110SS-2Cr steel were not broken, indicating a good resistance to environmental cracking with low stress corrosion sensitivity. As a result, the 825 steel could be used below the packer of production casing; the 110SS-2Cr steel is appropriate to be used in the middle of production casing; the T95 steel is suitable for the wellhead of production casing.

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Section: Microanalysis Of Corrosion Scalesmentioning

confidence: 99%

Corrosion Assessment of Different Production Casings and Material Selection in Sour Gas Wells

Zeng

Zhang

Wang

et al. 2015

SPE/IATMI Asia Pacific Oil &Amp; Gas Conference and Exhibition

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“…The effect of inhibitors adsorbed on metallic surfaces in acid solutions, is to slow down the cathodic reaction as well as the anodic process of dissolution of the metal. Such effect is obtained by forming a barrier of diffusion or by means of the blockage of the reaction sites [4].The molecules that, at the same time, contain nitrogen and sulfur in their structures are of particular importance, since these provide an excellent inhibition compared with the compounds that contain only sulfur or nitrogen [5].The property of inhibition of the corrosion of these compounds is attributed to their molecular structure.…”

Section: Introductionmentioning

confidence: 99%

Study of benzotriazole as corrosion inhibitors of carbon steel in chloride solution containing hydrogen sulfide using electrochemical impedance spectroscopy (EIS)

Solehudin¹,

Berman²,

Nurdin³

2014

AIP Conference Proceedings

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Corrosion and inhibition studies on API 5LX65 carbon steel in chloride solution containing various concentrations of benzotriazole has been conducted at temperature of 70 o C using Electrochemical Impedance Spectroscopy (EIS). Corroded carbon steel surface with and without inhibitor have been observed using X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Energy Dispersive Spectroscopy (EDS). The objectives of this research are to study the performance of benzotriazole as corrosion inhibitors. The experimental results of carbon steel corrosion in 3.5% NaCl solution containing 500 mg/l H 2 S at different BTAH concentrations showed that corrosion rate of carbon steel decreases with increasing of BTAH concentrations from 0 to 10 mmol/l. The inhibition efficiency of BTAH was found to be affected by its concentration. The optimum efficiency obtained of BTAH is 93% at concentration of 5 mmol/l. The result of XRD and EDS analysis reveal the iron sulfide (FeS) formation on corroded carbon steel surface without inhibitor. The EDS spectrum show the Nitrogen (N) bond on carbon steel surface inhibited by BTAH.

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“…The changes in fluid hydrodynamics, turbulence, wall shear stress, mass transfer, electrochemical corrosion, and the formation and destruction of corrosion product film are all intimately relevant to the hydrodynamic boundary layer and the diffusion boundary layer in the vicinity of the wall. Therefore, it is urgent that a deep insight into multiphase flow characteristics be conducted in order to understand the effects of multiphase flow induced erosion-corrosion [10,11].…”

Section: Introductionmentioning

confidence: 99%

Erosion-corrosion failure of REAC pipes under multiphase flow

Tang

Yang

Zheng

et al. 2009

Front. Energy Power Eng. China

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By using computational fluid dynamics (CFD) modeling and simulation, a predictive method was proposed to explore the erosion failure of reactor effluent air cooler (REAC) pipes with liner under multiphase flow. A theoretical model based on the erosion-corrosion effects of REAC on mixture turbulent flow was proposed for multiphase flow. Effects of various working conditions, liner shapes, and structures, as well as flow parameters on numerical simulations were investigated. Besides, the pipe's erosion-corrosion rules under multiphase flow and the relationship between multiphase flow and erosioncorrosion under dangerous working conditions were studied. By CFD numerical simulations, the exact position where some typical pipes thinned and failed rapidly by erosion was found and the main factors causing erosioncorrosion failure were discussed. Finally, numerical results obtained by using the proposed method were compared with experimental results.

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Influence of Turbulent Flow on the Localized Corrosion Process of Mild Steel with Inhibited Aqueous Carbon Dioxide Systems

Cited by 37 publications

References 0 publications

Corrosion Assessment of Different Production Casings and Material Selection in Sour Gas Wells

Corrosion Assessment of Different Production Casings and Material Selection in Sour Gas Wells

Study of benzotriazole as corrosion inhibitors of carbon steel in chloride solution containing hydrogen sulfide using electrochemical impedance spectroscopy (EIS)

Erosion-corrosion failure of REAC pipes under multiphase flow

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