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The active dissolution of tin in acidic chloride electrolyte solutions — a rotating disc study

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Abstract

The anodic dissolution of tin in acidic chloride electrolyte has been investigated using the rotating disc technique. The dissolution reaction has a Tafel slope of 64 ±5 mV dec−1 after the effects of diffusion are eliminated. The order of reaction with respect to Cl− ion has been found to be unity. The measured currents were also found to depend onC H+. The suggested mechanism involves quasi-reversible charge transfer.

A possible explanation is given for the observed current-time behaviour at low anodic current densities.

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Abbreviations

i :

Current density

i (∞) :

Current density at infinite rotation speed

i d ,Cl− :

Limiting current density due to Cl− diffusion

C cl − :

Concentration of chloride ion

C H+ :

Concentration of hydrogen ion

d 0 :

Diffusion coefficient of oxidised species

k b :

Rate constant for reduction of oxidised species

ν :

Kinematic viscosity

ω :

Angular velocity

α :

Anodic transfer coefficient

\(\underrightarrow k\) ⊖ :

Rate constant at standard equilibrium potential

→:

Direction of reaction

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Authors and Affiliations

  1. Department of Chemistry, Loughborough University of Technology, LE113TU, Loughborough, Leics

    B. N. Stirrup & N. A. Hampson

Authors
  1. B. N. Stirrup
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  2. N. A. Hampson
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Stirrup, B.N., Hampson, N.A. The active dissolution of tin in acidic chloride electrolyte solutions — a rotating disc study. J Appl Electrochem 6, 353–360 (1976). https://doi.org/10.1007/BF00608921

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  • DOI: https://doi.org/10.1007/BF00608921

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