Analysis of the inhibiting action of pectin on corrosion of AISI1040 dual-phase steel with ferrite–martensite and ferrite–bainite structure: a comparison in 0.5 M sulphuric acid

Prabhu, Deepa; Sharma, Sathyashankara; Prabhu, P R; Jomy, Jilna; Sadanand, Ramakrishna Vikas

doi:10.1007/s13738-021-02368-9

Cited by 8 publications

(1 citation statement)

References 49 publications

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“…In the nano-environment surrounding the gCDs, the electron may be transferred to casein and/or pectin, both materials with antioxidant capacity [ 39 , 40 ], thus preventing the electron its return to the valence band and, therefore, the fluorescence emission of the gCDs-BPFs seriously decreased. This process has been explained in terms of HOMO-LUMO energies [ 20 , 41 , 42 ] ( Supplementary Information ).…”

Section: Resultsmentioning

confidence: 99%

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

et al. 2022

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The deterioration of oil-based products during processing, distribution and storage has a major negative impact on the industry from an economic point of view. The spoilage of oil is mainly due to its oxidation which can be triggered by various factors, such as UV light, heating or the presence of impurities that result in the formation of radical species. In this context, several packaging alternatives have recently been developed with the aim to protect and extend the shelf life of oil-based products. This work aimed to study the antioxidant properties of bio-polymer-based films (BPFs) obtained from high methoxylated pectin (HMP) and sodium caseinate (CAS) and enriched with different concentrations of green carbon dots (gCDs), 0.25%, 0.50 and 1% w/w, obtained from apple pomace (APCDs) and rosemary powder (RCDs). The resulting films (gCDs-BPFs) have shown that the presence of gCDs not only modified the surface roughness of the films, but also positively affected their antioxidant properties. The addition of gCDs enhanced the radical inhibiting capacity of the raw BPFs by 42 and 62% for the films containing 1% RCDs and 1% APCDs, respectively. As a proof of the concept, two oil samples (edible and cosmetic) were treated with the obtained antioxidant films, and the results demonstrated that in both types of samples the oxidation process was minimized during the five days of the experiment. These results are promising and suggest that the antioxidant bio-polymer-based films could be excellent candidates for further production of active packaging.

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Section: Resultsmentioning

confidence: 99%

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

et al. 2022

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Corrosion Behavior of EN18 Steel and Copper in the Sulfuric Acid Medium for As-Bought and Annealed Materials

Jomy

Sharma

Prabhu

et al. 2022

J. of Materi Eng and Perform

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EN18 steel and copper are used as materials for oil and gas industries for chemical storage, which come in contact with the sulfuric acid medium during the pickling process. In such instances cleaning of impurities and oxide layer removal, leads to excessive corrosion. Thus, the improvement in the microstructure through annealing treatment and its effect on the corrosion behavior of EN18 steel and copper are studied by immersing in 0.5 M H2SO4 for as-bought and 0.5, 0.25, 0.1 M H2SO4 medium solutions after annealing treatment. The metal specimens were heated to 900 °C for EN18 steel and 600 °C for copper and then both were furnace cooled and the change in the microstructure of annealed and as-received metal specimens was analyzed using Scanning Electron microscopy (SEM). The Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic polarization (PDP) measurement showed that there is a decrease in the corrosion rate for both metals after annealing treatment. The effect of corrosion rate at the temperature range of 30-50 °C was analyzed and activation parameters were described using Arrhenius and transition state theories. Suitable corrosion mechanisms for both steel and copper in the H2SO4 medium have been discussed.

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Analysis of the Anti-corrosion Performance of Dodecyl Benzene Sulfonic Acid Sodium Salt on Various Heat-Treated Dual-Phase EN8 Steel in an Acidic Environment

Prabhu,

Jomy,

Prabhu

2023

J. of Materi Eng and Perform

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This work focuses on the investigation of the corrosion inhibition of heat-treated EN8 steel in the presence of sodium salt of dodecyl benzene sulfonic acid in 0.5 M H2SO4 using the Gravimetric and Electrochemical methods. Austenitizing is performed at 700, 750, 790, and 900 °C for 2 h followed by quenching in water. When the heat-treated metal is exposed to 0.5 M H2SO4 at the temperature of 30, 40, 50, and 60 °C in the presence of dodecyl benzene sulfonic acid sodium salt inhibitor, the corrosion inhibition increased with different heat treatment conditions depending on the phase change. This work investigates the activation and adsorption isotherm parameters. The adsorption isotherms were used to estimate Gibb's free energy change. The inhibition efficiency increased with inhibitor concentration and decreased with temperatures. Out of all the isotherms examined, the Langmuir adsorption isotherm produced the best-fit results, according to the adsorption study. Corrosion and inhibition on the metal's surface were confirmed by surface characterization.

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Analysis of the inhibiting action of pectin on corrosion of AISI1040 dual-phase steel with ferrite–martensite and ferrite–bainite structure: a comparison in 0.5 M sulphuric acid

Cited by 8 publications

References 49 publications

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

Corrosion Behavior of EN18 Steel and Copper in the Sulfuric Acid Medium for As-Bought and Annealed Materials

Analysis of the Anti-corrosion Performance of Dodecyl Benzene Sulfonic Acid Sodium Salt on Various Heat-Treated Dual-Phase EN8 Steel in an Acidic Environment

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