Essential role of element Si in corrosion resistance of a bridge steel in chloride atmosphere

Liu, Haixia; Huang, Feng; Yuan, Wei; Hu, Qian; Liu, Jing; Cheng, Y. Frank

doi:10.1016/j.corsci.2020.108758

Cited by 44 publications

(7 citation statements)

References 25 publications

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“…Therefore, the function of the microcell was harder to occur, and the BMs show better corrosion resistance. In addition, silicon in steel can form SiO 2 with a network microstructure during corrosion, which promotes the formation of α ‐FeOOH and reduces the anion selectivity, [ 36 ] improving the corrosion resistance of BMs. In conclusion, the dissimilar/similar welded samples are more likely to be corroded than DP980 BM and QP980 BM under the same environment.…”

Section: Resultsmentioning

confidence: 99%

Microstructure, Mechanical Properties, and Corrosion Behavior of Laser‐Welded Dissimilar Joints Between DP980 and QP980 Steel

Huang

Zhong

et al. 2021

steel research int.

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Herein, fiber laser welding experiments are performed to evaluate the microstructure, mechanical properties, and corrosion behavior of dissimilar/similar joints between DP980 and QP980 steel. Results show that the fusion zone (FZ) of all joints consists of lath martensite with high microhardness (≈480 HV); the retained austenite content in the subcritical heat‐affected zone (HAZ) in the QP980 side of the dissimilar weld joint (WJ) is less than base metals (BMs). Lower hardness in the subcritical HAZ is found compared with BMs in all joints. The microstructure of softening zones is tempered martensite, and the reduction in hardness is about 8.5−10.8% of BMs, which has a great influence on the tensile fracture position of WJs. All joints fracture at softening zones with a typical feature of ductile fracture, and the joint efficiencies are above 96%. The electrochemical corrosion test reveals that the welded samples exhibit a higher corrosion rate compared with the BMs due to the increase in martensite content and area fraction of grain boundary.

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Section: Resultsmentioning

confidence: 99%

Microstructure, Mechanical Properties, and Corrosion Behavior of Laser‐Welded Dissimilar Joints Between DP980 and QP980 Steel

Huang

Zhong

et al. 2021

steel research int.

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“…Although the content of Ni in the powder is up to 3.5%, it is difficult to form stable carbides between Ni and C. Combined with the XRD and EDS results in figure 5, it infers that the Ni element is mainly distributed in γ-Fe matrix to form a solid solution with Fe and Cr, which plays a role in stabilizing the austenite phase [19]. At the same time, Si can form a thin film of SiO 2 at the steel surface when the steel is in a high-temperature, which can improve the oxidation resistance of the spray welding layer in the high-temperature service environment [20,21].…”

Section: The Phase Composition Of the Spray Welding Layermentioning

confidence: 94%

Research on microstructure and properties of 3D plasma spray welding repair layer of continuous casting segmented rollers

Li,

Zhou,

Meng

et al. 2023

Mater. Res. Express

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In this paper, the Fe-Cr-Ni-Si powder was used in a 3D plasma spray welding machine to perform spray welding repair tests on continuous casting segmented rollers for service life improvement. The phase composition, hardness distribution, abrasion resistance and thermal stability of the spray welding layer were analyzed. Results indicated that the spray welding layer produced by 160 A welding current was more uniform and was with finer organization. The main phase zone was a single γ-Fe and the fusion zone was metallurgically combined with the base metal in a planar crystal manner. The hardness of the spray welding layer was the maximum when the welding current was 160 A. The abrasion resistance for each position of the spray welding layer was uniform. The γ-Fe phase zone decreased and the α-Fe phase zone increased with reduction of average hardness after the thermal stability test. In industrial tests, the optimum spray welding parameters were verified and the service life of the continuous casting segmented rollers with spray welding was 2 longer than rollers using surfacing welding process.

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“…Through the corrosion rate in Table 5 and the morphology of corrosion surface in Fig. 10, it is obvious that the corrosion resistance of the alloy is enhanced with the increasing atomic Si content owing to the high corrosion potential of Si [62]. In summary, FeCoCrNiMoSi1.5 HEA showed the strongest corrosion resistance immersed in 1 mol/L H2SO4 solution for 31 days, while the other two HEAs were similar in corrosion resistance, both inferior to FeCoCrNiMoSi1.5 HEA.…”

mentioning

confidence: 91%

Microstructure and properties of FeCoCrNiMoSix high-entropy alloys fabricated by spark plasma sintering

Yang¹,

Ren²,

Yan-wen³

et al. 2021

Journal of Alloys and Compounds

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Essential role of element Si in corrosion resistance of a bridge steel in chloride atmosphere

Cited by 44 publications

References 25 publications

Microstructure, Mechanical Properties, and Corrosion Behavior of Laser‐Welded Dissimilar Joints Between DP980 and QP980 Steel

Microstructure, Mechanical Properties, and Corrosion Behavior of Laser‐Welded Dissimilar Joints Between DP980 and QP980 Steel

Research on microstructure and properties of 3D plasma spray welding repair layer of continuous casting segmented rollers

Microstructure and properties of FeCoCrNiMoSix high-entropy alloys fabricated by spark plasma sintering

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