Recommend design of filler metal to minimize carbon steel weld metal preferential corrosion in CO2-saturated oilfield produced water

Lu, Yongxin; Jing, Hongyang; Han, Yongdian; Zheng, Feng

doi:10.1016/j.apsusc.2016.07.151

Cited by 26 publications

(16 citation statements)

References 48 publications

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“…Unlike steel in the blank corrodent, the presence of APM (Figure c) and polyCMCh- graft -polyMVI (Figure d) within the test medium has significantly reduced corrosion by formation of protective films on the metal surface. The SEM micrographs of X70 surfaces containing both APM and polyCMCh- graft -polyMVI show evidence of reduced corrosion attack due to molecular adsorption and the formation of more stable protective passive films on steel . The inset in Figure e reveals scale coverings on the metallic surface immersed within the corrodent.…”

Section: Results and Discussionmentioning

confidence: 96%

Conversion of Imidazole to N-(3-Aminopropyl)imidazole toward Enhanced Corrosion Protection of Steel in Combination with Carboxymethyl Chitosan Grafted Poly(2-methyl-1-vinylimidazole)

Eduok

Ohaeri

Szpunar

2019

Ind. Eng. Chem. Res.

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In this study, the synthesis route for preparing N-(3aminopropyl)imidazole (APM) from imidazole has been reported via hydrogenation using Raney nickel catalyst. The inhibition performance of the resultant imidazoline product against pipeline steel corrosion has been investigated in CO 2 saturated acidic oilfield formation water. The contributions of carboxymethyl chitosan grafted poly(2-methyl-1vinylimidazole) copolymer (polyCMCh-graf t-polyMVI) newly synthesized from chitosan revealed a synergy of protective capacity in combination with APM. Corrosion inhibition by APM/graft copolymer conjugate is attributed to molecular adsorption and the formation of more stable protective inhibitor films on the steel surface compared to individual compounds. In-depth electrochemical corrosion investigation is reported by means of electrochemical impedance spectroscopy and potentiodynamic polarization as well as surface analytical techniques. Adsorbed ferrous carbonate phases are observed at acid pH with apparently amorphous morphologies. Modeled mechanisms of corrosion and corrosion inhibition have been illustrated from experimental evidence in line with the barrier performance on adsorbed films.

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Section: Results and Discussionmentioning

confidence: 96%

Conversion of Imidazole to N-(3-Aminopropyl)imidazole toward Enhanced Corrosion Protection of Steel in Combination with Carboxymethyl Chitosan Grafted Poly(2-methyl-1-vinylimidazole)

Eduok

Ohaeri

Szpunar

2019

Ind. Eng. Chem. Res.

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“…In addition, it can be concluded that Ni is enriched in the rust film of Ni3 WZ more significantly, which presents bright yellow via comparing the element color contrast ratio of the three welded joints. A number of research studies reported [ 7,15–22 ] that Ni constantly enriching the rust film can block the intrusion of Cl − to form an even better corrosion protection to the substrate. Thus, the higher corrosion resistance of WMs for Ni2 and Ni3 welded joints as compared with Ni1 welded joint should be attributed to the rust film with better protective performance.…”

Section: Resultsmentioning

confidence: 99%

“…Zhu et al [ 16 ] developed novel welding wires free of Ni and Mo for 3Cr pipeline steel, presenting significantly lower hardness values than the commercial wires, which possessed better tensile strength and elongation. Similarly, Lu et al [ 17 ] found that the alloy elements such as Ni, Cr, Cu, and Mo improved the tensile strength of WM. However, Ren et al [ 18 ] reported a reverse conclusion that the elongation decreased with higher Ni content in WM.…”

Section: Introductionmentioning

confidence: 90%

Investigation on the nickel content design and the corrosion resistance of low alloy steel welded joint in tropical marine atmosphere environment

Zhang

Liu

Dong

et al. 2021

Materials & Corrosion

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In this study, three kinds of welding materials (WMs) with different Ni contents were designed for low alloy steel welded joints made by CO2 gas‐shielded welding technique. The corrosion resistance of welded joint was studied through the atmosphere exposure test in Trat, Thailand. Results show that there was a hardening in the heat‐affected zone after welding, and the average hardness slightly increased with the increase of Ni in WM. The electrochemical activity at the fusion line zone enhanced with the addition of Ni in WM, indicating a more obvious local galvanic corrosion effect there. Ni promoted the generation of NiFe2O4 and the transformation from γ‐FeOOH to α‐FeOOH, which increased the impedance modulus of the rust film on WM. More important, the corrosion performance assessment illustrated that the addition of Ni in WM hardly had an effect on the corrosion step values after half a year test, which confirmed that there is no need to add excessive content of Ni.

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“…The all‐weld‐metal coupons were welded with gas tungsten arc welding (GTAW). The welded joint W and W1 were obtained by two kinds of filler metal . Welding was performed at 155 A, 12 V, and a heat input of 1.53 KJ mm −1 .…”

Section: Methodsmentioning

confidence: 99%

A finite element model of carbon steel welded joint corrosion under plastic strain

Jing

Han

et al. 2017

Materials & Corrosion

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A finite element (FE) model is presented in this work that simulates and predicts the mechano‐chemical corrosion behavior of welded joint under different plastic strains. The FE model contains two parts: the stress calculating of welded joint using Abaqus software and the chemical reaction of welded joint using COMSOL Multiphysics® software. The simulating corrosion depth of weld metals center are close to experimental measurements on the welded joint under different plastic strains. Meanwhile, effect of weld reinforcement, strain, and welding material on the mechano‐chemical corrosion behavior of welded joint under different plastic strains was investigated using the FE model.

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Recommend design of filler metal to minimize carbon steel weld metal preferential corrosion in CO2-saturated oilfield produced water

Cited by 26 publications

References 48 publications

Conversion of Imidazole to N-(3-Aminopropyl)imidazole toward Enhanced Corrosion Protection of Steel in Combination with Carboxymethyl Chitosan Grafted Poly(2-methyl-1-vinylimidazole)

Conversion of Imidazole to N-(3-Aminopropyl)imidazole toward Enhanced Corrosion Protection of Steel in Combination with Carboxymethyl Chitosan Grafted Poly(2-methyl-1-vinylimidazole)

Investigation on the nickel content design and the corrosion resistance of low alloy steel welded joint in tropical marine atmosphere environment

A finite element model of carbon steel welded joint corrosion under plastic strain

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