Iron succinate coordination compounds. Simulation of formation processes

Rakhimova, M. M.; Yusupov, N. Z.; Suyarov, K. D.; Khasanova, K. G.; Bekbudova, Sh.

doi:10.1134/s0036023613080196

Russ. J. Inorg. Chem.

2013

DOI: 10.1134/s0036023613080196

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Iron succinate coordination compounds. Simulation of formation processes

M. M. Rakhimova

N. Z. Yusupov

K. D. Suyarov

et al.

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Cited by 5 publications

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“…In view of the above, it is expedient to evaluate the oxidative ability of mineral acid solutions containing Fe(III) and Fe(II) salts. To study the processes of complex formation in these redox systems, we used the potentiometry method [12,13], which is highly sensitive, inexpensive and experimentally simple. The processes occurring in solutions of acids containing Fe(III) and Fe(II) cations were quantitatively characterized using the real potential, which is interpreted as the redox potential of the system established in a particular solution at equal starting concentrations of the oxidized and reduced forms of the potential-determining ions, without corrections for complexation, hydrolysis, and other processes [14].…”

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confidence: 99%

Effect of anionic composition of solutions of mineral acids containing Fe(III) on their oxidizing properties

Avdeev¹,

Andreeva²,

Panova³

et al. 2019

Int. J. Corros. Scale Inhib.

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Solutions of HClO 4 , HBr, H 2 SO 4 , HCl, H 3 PO 4 , HF and some of their mixtures containing Fe(III) and Fe(II) cations were studied at 20-95°C by potentiometry. The oxidizing ability of such solutions of individual acids decreases in the series: HClO 4  HBr  H 2 SO 4  HCl  H 3 PO 4  HF. This effect is the result of the enhancement in this series of the ability of anions of acids to bind Fe(III) cations into complex compounds that are less prone to reduction in comparison with its aqua complexes. To decrease the oxidative ability of acid solutions (HCl and H 2 SO 4 ) with a weak ability of anions to bind Fe(III) cations to complex compounds, it is possible to add acids (H 3 PO 4 or HF) that generate anions binding Fe(III) into stable and hardly reducible complexes. In the H 2 SO 4 -H 3 PO 4 -H 2 O, H 2 SO 4 -HF-H 2 O, HCl-H 3 PO 4 -H 2 O, and HCl-HF-H 2 O systems containing Fe(III) and Fe(II), the dependence of the redox potential of the Fe(III)/Fe(II) couple on the anionic composition of the medium showed that H 3 PO 4 is the most promising additive that reduces the oxidizing properties of HCl and H 2 SO 4 in solutions. In the HCl-H 3 PO 4 -H 2 O system taken as an example, the main regularities of changes in the oxidizing properties of two-component acid mixtures containing Fe(III) and Fe(II) are revealed. Variation in the total content of an equimolar Fe(III)+Fe(II) mixture (C = 0.01-0.10 M) in 1 M HCl + 1 M H 3 PO 4 nearly does not affect its oxidative ability. Conversely, an increase in the relative content of Fe(III) in the system considerably increases its oxidative potential. At a fixed concentration of the Fe(III) + Fe(II) mixture (0.04 M) in the HCl + H 3 PO 4 system, an increase in the concentration of these acids from 1 to 4 M slightly reduces the oxidative properties of the system. Improving the corrosion protection of steel in HCl or H 2 SO 4 solutions containing Fe(III) salts with a composite inhibitor (IFKhAN-92 + KNCS + hexamine) can be effective when H 3 PO 4 is added. This effect is largely determined by the binding of Fe(III) cations to phosphate complexes, which have a lower oxidizing capacity compared to its aqueous, sulfate and chloride complexes.

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Effect of anionic composition of solutions of mineral acids containing Fe(III) on their oxidizing properties

Avdeev¹,

Andreeva²,

Panova³

et al. 2019

Int. J. Corros. Scale Inhib.

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Characteristics of the Mechanism of Corrosion of Low-Carbon Steels in Acid Solutions Containing Fe(III) Salts

Avdeev

Andreeva

2021

Russ. J. Phys. Chem.

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Mechanism of Steel Corrosion in Inhibited Acid Solutions Containing Iron(III) Salts

Avdeev

Andreeva

2022

Russ. J. Phys. Chem.

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Iron succinate coordination compounds. Simulation of formation processes

Cited by 5 publications

References 1 publication

Effect of anionic composition of solutions of mineral acids containing Fe(III) on their oxidizing properties

Effect of anionic composition of solutions of mineral acids containing Fe(III) on their oxidizing properties

Characteristics of the Mechanism of Corrosion of Low-Carbon Steels in Acid Solutions Containing Fe(III) Salts

Mechanism of Steel Corrosion in Inhibited Acid Solutions Containing Iron(III) Salts

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