Comparative Study on Flow-Accelerated Corrosion and Erosion–Corrosion at a 90° Carbon Steel Bend

Zeng, Li; Chen, Geng; Chen, Hanxin

doi:10.3390/ma13071780

Cited by 49 publications

(16 citation statements)

References 34 publications

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“…The extended exposure to heavy metals like Ni, Zn, Cu and As can lead to injurious health complexities in humans [59]. The Ni contents can be easily extracted from soil and the plants anchored in it [60][61][62][63][64][65].…”

Section: Nickel and Zinc Concentrations In Vegetable Samplesmentioning

confidence: 99%

Assessment of Zinc and Nickel Profile of Vegetables Grown in Soil Irrigated with Sewage Water

Liang¹,

Khan²,

Ahmad³

et al. 2020

Rev. Chim.

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The current investigation assessed the nickel and zinc contents of the soil, and the vegetables grown in wastewater irrigated areas. Atomic Absorption Spectrophotometer (AA-6300 Shimadzu Japan) assessed the metal profile of the samples. The mean concentrations of metals in soil samples varied from O.O85 to 1.611 mg/kg for Ni and O.453 ~ O.9O8 mg/kg for Zn. In vegetables, the maximum Ni concentration was observed in Capsicum baccatum consequent to wastewater irrigation, while its minimum concentrations were noticed in Capsicum frutescens after canal water irrigation. Sewage water irrigation resulted in the highest Zn contents in Solanum lycopersicum and the lowest Zn contents were noticed in Capsicum baccatum after canal water irrigation. The daily intake values of Ni and Zn were higher caused by sewage water irrigation as compared to the canal water irrigation in all tested vegetable samples. Health risk index (HRI) values for Ni and Zn accumulation in vegetables fell within the permissible limit in Pakistan and these were regarded as appropriate for human intake.

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Section: Nickel and Zinc Concentrations In Vegetable Samplesmentioning

confidence: 99%

Assessment of Zinc and Nickel Profile of Vegetables Grown in Soil Irrigated with Sewage Water

Liang¹,

Khan²,

Ahmad³

et al. 2020

Rev. Chim.

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“…The extraction methods employed in the extraction of polysaccharides play huge role in the bioactivities as well as the yield of polysaccharide. Response Surface Methodology (RSM) is a collection of mathematical and statistical techniques used for improving and development of extraction process [19][20][21][22][23]. It is also useful in evaluating the effects of several independent variables not necessarily using predetermined relationship on the system responses.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Physicochemical and DPPH� Cleaning Activity of Ultrasonic Assisted Extraction of Polysaccharide from Leonurus japonicus

Yang¹,

Mercy²,

Efehi³

et al. 2020

Rev. Chim.

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Leonurus japonicus is rich in bioactive compounds especially polysaccharide. Single factors test and response surface methodology were used to study the optimum conditions for ultrasonic - assisted extraction of polysaccharide from L. japonicus, and its physiochemical and DPPH scavenging activities also were evaluated. The optimal conditions as underpinned by this paper is as follow: extraction temperature of 70 �C, extraction time of 50 min and extraction power of 210W. The polysaccharide of L. japonicus was shown to be a non-reducing sugar and to exhibit DPPH scavenging activity to an extent. The polysaccharide structures were studied using SEM, AFM, and FT-IR. It showed L. japonicus polysaccharide had been having more than one chains which were branched and entangled with each other. and existed a broad band wavelength of 2925.64, 1635.06, 1539.7, 1046.73, and 477.86 cm-1. The study indicated that L. japonicus may have a beneficial use to the medical and food industries.

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“…Pipeline is an important part of equipments, which is widely used in petrochemical, aerospace, and other industrial applications, and is extremely important in safe production. There are unavoidable erosion and corrosion during applications, which maybe lead to leakage of the pipeline because of harsh working environments [14][15][16][17][18]. The main reasons of leakage are erosion, electrochemical corrosion, turbulent and chemistry, and their interactions.…”

Section: Discussionmentioning

confidence: 99%

Simulation Analysis of Erosion–Corrosion Behaviors of Elbow under Gas-Solid Two-Phase Flow Conditions

Zeng

Wenchuang

2020

Lubricants

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In the production and gathering process of coal gas, the complex composition of the coal gas, harsh environments, the complex medium, and high content of solid particles in slurry cause the equipment malfunctions and even failure because of erosion and corrosion. In the present study, COMSOL multi-physics finite element simulation software is used to simulate the erosion–corrosion behaviors of elbow in key chemical equipments. The electrochemical corrosion, solid particle erosion, chemical reaction, and turbulent flow are coupled together. The particle count method is proposed to clarify the erosion phenomenon. The simulation results show that particles with high turbulent intensity hit the wall of elbow directly, which forms a slanted elliptical erosion zone on the extrados surface at 40°–50°. The chemical reaction in turbulence has a difference in the concentration distribution of substances, and this phenomenon leads to different magnitudes of the corrosion current densities in the tube. Moreover, 1/6 released particles hit the extrados surface of the elbow. These findings are beneficial to understand the erosion–corrosion phenomena and design the elbow in key chemical equipment.

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Comparative Study on Flow-Accelerated Corrosion and Erosion–Corrosion at a 90° Carbon Steel Bend

Cited by 49 publications

References 34 publications

Assessment of Zinc and Nickel Profile of Vegetables Grown in Soil Irrigated with Sewage Water

Assessment of Zinc and Nickel Profile of Vegetables Grown in Soil Irrigated with Sewage Water

Evaluation of Physicochemical and DPPH� Cleaning Activity of Ultrasonic Assisted Extraction of Polysaccharide from Leonurus japonicus

Simulation Analysis of Erosion–Corrosion Behaviors of Elbow under Gas-Solid Two-Phase Flow Conditions

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