The Effect of Nanocomposite Superhydrophobic Coating on Corrosion and Kinetics of Electrode Processes on Steel in 0.5 M NaCl Solution

Вигдорович, В. И.; Цыганкова, Л. Е.; Uryadnikov, A. A.; Shel, N. V.; Knyazeva, L. G.; Tanygina, E. D.

doi:10.1134/s2070205117070176

Cited by 3 publications

(6 citation statements)

References 22 publications

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“…At the initial stage of the corrosive action of the medium (immediately after immersing the electrodes in the solution), E cor of steel with a superhydrophobized surface is much more positive than the open-circuit potential of the unprotected metal, equal to -0.420 V (Figure 1). A qualitatively similar picture was earlier observed in a 0.5 M NaCl solution [20]. The kinetic parameters of electrode reactions (type I electrodes) are given in Table 1.…”

Section: Effect Of the Concentration Of Hydrogen Ionssupporting

confidence: 82%

“…Moreover, the quantity cor Cl lg / lg d i d a  is close to 1.3. A characteristic feature of hydrophobized steel at the initial stage of corrosion in neutral chloride media is the high values of E cor , which was observed earlier in 0.5 M NaCl [20]. However, this occurs only in the region of small concentrations of chloride anions (0.0005-0.001 mol/L).…”

Section: Effect Of the Concentration Of Chloride Ionsmentioning

confidence: 87%

“…Superhydrophobization of the metal surface allows to achieve a reduction in the corrosion rate in neutral chloride media from 8 [19] to 10 4 [3] times. The protective effect is due to the resulting lack of water as a participant in electrode processes [20].…”

mentioning

confidence: 99%

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Influence of the acidity of the medium and the activity of chloride ions on kinetics of partial electrode reactions on steel with a superhydrophobic surface in chloride media

2018

Int. J. Corros. Scale Inhib.

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Section: Effect Of the Concentration Of Hydrogen Ionssupporting

confidence: 82%

Section: Effect Of the Concentration Of Chloride Ionsmentioning

confidence: 87%

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Influence of the acidity of the medium and the activity of chloride ions on kinetics of partial electrode reactions on steel with a superhydrophobic surface in chloride media

2018

Int. J. Corros. Scale Inhib.

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“…In [12], the results of a study of the corrosion and electrochemical behavior of St3 carbon steel with a superhydrophobic surface layer in a 0.5M NaCl solution are presented. The effect of two types of superhydrophobic coating was considered.…”

Section: Introductionmentioning

confidence: 99%

“…The aim of this work is to study the corrosion and electrochemical behavior of carbon steel with a superhydrophobic coating of a different type than in [12], in a chloride solution in the absence and presence of hydrogen sulfide additive.…”

Section: Introductionmentioning

confidence: 99%

The effect of superhydrophobic coating on the electrochemical behavior of carbon steel in chloride and hydrogen sulfide–chloride environments

2020

Int. J. Corros. Scale Inhib.

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Corrosion and kinetics of electrode processes on St3 steel with a superhydrophobic coating based on laser surface texturing followed by hydrophobization with fluoroxysilane (wetting angle 165±2°, rolling angle 3±1°) have been studied in a highly mineralized chloride medium (50 g/L NaCl) in the absence and presence of an additive of hydrogen sulfide (400 mg/L). Similar studies were conducted with uncoated electrodes. The influence of a duration of an exposure of the electrodes in a solution (0.25-96 hours) on kinetics of electrode processes and corrosion rate of steel is considered. In the absence of hydrogen sulfide, a presence of a superhydrophobic coating on steel causes a decrease in the corrosion rate by 67, 13, and 2 times after 0.25, 24, and 48 hours of exposure in a chloride solution. In time, the cathodic process slows down and the anodic one accelerates, especially in a case of electrodes with a hydrophobic coating. In the presence of hydrogen sulfide in a chloride solution, steel with a superhydrophobic coating is characterized by more than an order of magnitude low corrosion rate, compared with unprotected samples during a 96-hour exposure of the electrodes. In this case, there is a slowdown in the anodic reaction and acceleration of the cathodic one compared to the solution without hydrogen sulfide. The corrosion process proceeds with anodic control.

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Hydrophobic durability and anti-corrosion of plasma nitriding layer: Evolution mechanisms of corrosion behavior under variations in local hydrochemistry

Zhao

Chen

Jin

et al. 2023

Mater. Res. Express

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Mechanisms for the effects of nitrogen on the durability of hydrophobic and corrosion resistance of modified layers prepared on the surface of AH32 steel by plasma nitriding have been investigated. It was found that plasma nitriding can significantly improve the hydrophobicity of AH32 steel. All the contact angles (CAs) of the AH32 steel with 1 h, 3 h and 5 h nitriding were higher than 120o, which had excellent hydrophobicity. The acidification degree of the solution within the nitriding layer’s micro-zone was effectively reduced due to the dissolution of nitrogen. The micro-nano structures of the nitriding layers corroded severely after 15 days of exposure to NaCl solution. When the nitriding time is extended to 5 h, the acidification degree of the solution was intensified due to the enhanced blocking effect, and the nitrogen in the nitriding layer saturated that cannot provide enough nitrogen ions to offset the acidification of the solution, so the durability decreased instead. In comparison, the modified layer with 3 h nitriding in this study had the best durability and long-term service protective effect on AH32 steel.

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The Effect of Nanocomposite Superhydrophobic Coating on Corrosion and Kinetics of Electrode Processes on Steel in 0.5 M NaCl Solution

Cited by 3 publications

References 22 publications

Influence of the acidity of the medium and the activity of chloride ions on kinetics of partial electrode reactions on steel with a superhydrophobic surface in chloride media

Influence of the acidity of the medium and the activity of chloride ions on kinetics of partial electrode reactions on steel with a superhydrophobic surface in chloride media

The effect of superhydrophobic coating on the electrochemical behavior of carbon steel in chloride and hydrogen sulfide–chloride environments

Hydrophobic durability and anti-corrosion of plasma nitriding layer: Evolution mechanisms of corrosion behavior under variations in local hydrochemistry

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