Electrochemical behaviour of stainless steel in acidic fluoride media

Martinović, Ivana; Pilić, Zora; Dragičević, Ivan; Višekruna, Antonija

doi:10.3139/146.111278

Cited by 6 publications

(2 citation statements)

References 57 publications

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“…RON and stainless steel are among the most important materials because of their good properties and wide applications. [1][2][3] The main limitation for their applications is a corrosion attack. [4][5][6][7] The corrosion behaviour of metals and alloys primarily depends on the properties of the surface oxide layer.…”

Section: Introductionmentioning

confidence: 99%

Effect of Helichrysum italicum on the Electrochemical Corrosion Behaviour of Iron in Simulated Acid Rain Solution

Pilić

Martinović

Pavlinović

et al. 2019

Croat. chem. acta (Online)

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The aqueous extract of the Helichrysum italicum leaves (HI) is tested as a corrosion inhibitor of an iron in a simulated acid rain using potentiodynamic polarisation, cyclic voltammetry and electrochemical impedance spectroscopy. Results of all electrochemical methods indicate an increase of a corrosion inhibition efficiency of the iron with the HI extract concentration. Maximum inhibition efficiency (~ 50 %) is obtained at 2.0 g L–1 HI extract. The inhibitive action is assumed to occur via an adsorption of the HI extract on the iron surface. Results indicate that the adsorption process is spontaneous and follows the Freundlich adsorption isotherm. According to the calculated ΔG value (~ 15 kJ mol–1), the corrosion inhibition of the iron occurs predominantly via a physisorption of the HI extract. The concentration of iron ions released into a solution, measured by atomic absorption spectrometry, is in accordance with the electrochemical results.

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Section: Introductionmentioning

confidence: 99%

Effect of Helichrysum italicum on the Electrochemical Corrosion Behaviour of Iron in Simulated Acid Rain Solution

Pilić

Martinović

Pavlinović

et al. 2019

Croat. chem. acta (Online)

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“…The mechanism of growth and electrochemical properties of the oxide film on AISI 304 stainless steel were studied in fluoride media at different pH values. Fluoride concentration has a significant effect on dissolution rate and oxide film resistance relative to pH [11].…”

Section: Dissolution Of Stainless Steel In Sodium Chloride Solution At Polarization By Non-stationary Currentmentioning

confidence: 99%

Dissolution of Stainless Steel in Sodium Chloride Solution at Polarization by Non-Stationary Current

Nurdillayeva¹,

Sauirbay²,

Bayeshov³

2021

News of NAN RK. SCTS

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Stainless steel is in great demand due to its mechanical strength, heat resistance, and resistance to corrosive environments. This article presents the result of a study of the electrochemical dissolution behavior of a stainless steel electrode (12X18H10T) at polarization by 50 Hz alternating current in a neutral medium (NaCl). Preliminary experiments have shown that the main processes do not take place when two stainless steel electrodes are polarized with an alternating current. It was observed that by the polarization of the “stainless steel – titanium” pair electrodes with alternating current, the alloy is intensively dissolved with the formation of iron (II) and chromium (III) ions. This is due to the "valve" properties of the oxide layer formed on the surface of the titanium electrode. A change in the value of the current density of the titanium and steel electrodes significantly affects the process of electrochemical dissolution of the alloy. At high current densities, the dissolution rate of the alloy decreases due to the deterioration of the current correcting properties of titanium. With an increase in the electrolyte concentration, the current efficiency is reduced as salt passivation occurs. A maximum value of the current efficiency of dissolution of stainless steel was observed at a current frequency of 50 Hz. High frequencies of the alternating current do not provide an adjustable duration of the anodic half-cycle for the oxidation reaction due to the frequent change of halfcycles of the alternating current. It was observed that increasing the temperature of the electrolyte reduces the current efficiency of the electrochemical dissolution of stainless steel electrodes. The effects of main electrochemical parameters on the electrolysis process have been investigated, and the optimal conditions of the alloy dissolution were established (іТі = 60 kA/m2 , іSS = 800 A/m2 , [NaCl] = 2.0 M, t = 30, ν = 50 Hz.).

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Development of electrochemistry in Bosnia and Herzegovina — historical perspective

Mitrović

2023

J Solid State Electrochem

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Electrochemical behaviour of stainless steel in acidic fluoride media

Cited by 6 publications

References 57 publications

Effect of Helichrysum italicum on the Electrochemical Corrosion Behaviour of Iron in Simulated Acid Rain Solution

Effect of Helichrysum italicum on the Electrochemical Corrosion Behaviour of Iron in Simulated Acid Rain Solution

Dissolution of Stainless Steel in Sodium Chloride Solution at Polarization by Non-Stationary Current

Development of electrochemistry in Bosnia and Herzegovina — historical perspective

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