Corrosion of stepwise dissolving metals; corrosion mechanism of indium

Losev, V. V.; Pchel'nikov, A. P.

doi:10.1016/0013-4686(73)85024-8

Cited by 13 publications

(13 citation statements)

References 3 publications

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“…The methods of studying transient states of electrochemical systems, particularly, chronoammetry and chronopotentiometry are widely used in clarifying the kinetics of electrode reactions, including electrocatalysis or estimating the parameters of diffusion layers often formed at the electrode-solution interfaces [1][2][3][4][5]. In a case of planar and perfectly smooth electrodes with an S g geometric surface area (mercury, amalgams, liquid metals or alloys), the following equations are valid for the I f current and η f overpotential [5]:…”

Section: Introductionmentioning

confidence: 99%

Chronoammetry and Chronopotentiometry on Electrodes with a Microrough Surface: Theoretical Consideration

Kozaderov

Vvedenskii

2005

Prot Met

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The problem of transient two-dimensional diffusion to a microrough electrode under galvano-and potentiostatic polarization conditions is solved. The effect of the scale and morphology of roughness, as well as the diffusivity on the time dependences of I current and η overpotential is analyzed. Both of them are found to be practically independent of the type of the roughness, while its degree (the microroughness factor f r ) decisively affects the shape of the current-and overpotential-decay curves. At a relatively short polarization when the diffusion front profile repeats the electrode surface relief, the parameters of transient electrochemical methods (the I current in the potentiostatic measurements and the τ 1/2 rooted transient time in the galvanostatic ones) linearly depend on the microroughness factor. Upon a relatively long polarization when the diffusion front is noticeably distant from the surface and almost planar, the current and overpotential values fit in with classical equations of chronoammetry and chronopotentiometry, being independent of f r . At a thickness of the diffusion layer comparable to the height of surface irregularities, the current (as well as the rooted transient time) ratio of the microrough to perfectly smooth electrode surface looses its linear dependence on the surface parameters. The time location of this range is chiefly determined by the diffusivity and the mean distance between the microscopic surface irregularities.

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Section: Introductionmentioning

confidence: 99%

Chronoammetry and Chronopotentiometry on Electrodes with a Microrough Surface: Theoretical Consideration

Kozaderov

Vvedenskii

2005

Prot Met

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“…In acidic solutions, the dissolution of indium occurs stepwise by the formation of unstable intermediates - ). This apparently explains a marked increase in the rate of corrosion of indium in acidic chloride containing solutions [10].…”

Section: Resultsmentioning

confidence: 92%

“…The mechanism of the corrosion behavior of multivalent metal according to work [10] has a stepwise character and is accompanied by the formation of unstable intermediate low valence compounds.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion of Indium in Chloride and Sulfate Electrolytes

et al. 2014

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When the electrochemical purification of rough indium is used as sulfate, and chloride electrolytes. Significant differences in the values of the stationary potential indium electrode in the above solutions weren't observed.The corrosion behavior of rough indium in chloride and sulfate electrolytes with potentiodynamic method was studied. For determining the influence of the electrolyte composition obtained corrosive diagram for solution: sodium chloride; sodium chloride containing indium chloride (III); indium chloride (III); sulfuric acid; sulfuric acid containing sulfate indium (III). Experimental results allowed to determine the composition of the electrolyte, characterized by a high rate of dissolution of indium. It was found that dissolution of the indium occurs at high velocity in the indium-containing electrolytes and at higher temperatures. For electrolytes containing indium with pH = 4 was observed increase dissolution rate of indium anode with increasing temperature, indicating that the limitation of the process electrochemical stage and the beginning of the formation of indium hydroxide. Research results can be used in the electrochemical refining of rough indium.

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“…They suggested the mechanism that consisted of two steps at higher current density: (9) Analysis of the experimental data obtained by cathodic polarization in indium sulfate solution at higher current density pointed to the reaction step, In 3+ + 2e → In + , as rate-determining. For anodic polarization they could conclude that a disproportionation reaction occurred with increasing current density, and that the first anodic reaction step In 48) also reported that the corrosion of indium metal was stepwise dissolving reaction and the corrosion of indium in acidic perchlorate solutions proceeded by the complex electrochemical-chemical (EC) mechanism containing the oxidation step of In + by the reduction of H + ions. Markovac et al 49) studied the dependence of the mechanism of electrochemical deposition and dissolution of indium on electrolytes.…”

Section: /Inmentioning

confidence: 99%

Electrochemical behaviors of Indium

Chung¹,

Lee²

2012

Journal of Electrochemical Science and Technology

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:Many researchers focus on indium contained semiconductors and alloy compounds for their various applications. Electrochemists want to obtain indium contained compounds simply via one-step electrodeposition. First of all, electrochemistry of constituent elements must be understood in order to develop the best condition for the electrodeposition of indium contained compounds. We will review the electrochemistry of indium. Equilibria between indium metal and indium ions and the standard electrode potentials of the equilibria will be reviewed. The electrochemical reactions of indium species are affected by surrounding conditions. Thus dependences of electrochemical behaviors of indium metal and indium ions on various parameters will be reviewed.

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Corrosion of stepwise dissolving metals; corrosion mechanism of indium

Cited by 13 publications

References 3 publications

Chronoammetry and Chronopotentiometry on Electrodes with a Microrough Surface: Theoretical Consideration

Chronoammetry and Chronopotentiometry on Electrodes with a Microrough Surface: Theoretical Consideration

Corrosion of Indium in Chloride and Sulfate Electrolytes

Electrochemical behaviors of Indium

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