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Voltammetry: Factors Affecting Measurements01:21

Voltammetry: Factors Affecting Measurements

A current produced due to the redox reactions of the analyte at the working and auxiliary electrodes is called a faradaic current. The reaction can be divided into two types. The current generated due to the reduction of the analyte is called cathodic current, and it carries a positive charge. In contrast, the current produced by analyte oxidation is known as an anodic current, and it has a negative charge. The applied potential at the working electrode determines the faradaic current flow, and...
Amperometry: Overview01:10

Amperometry: Overview

Amperometry is a technique commonly used to measure the concentration of specific analytes in a solution by monitoring the electric current generated during an electrochemical reaction. It involves applying a constant potential between a working electrode and a reference electrode to measure the resulting current, which is proportional to the concentration of the analyte. The Clark oxygen electrode operates based on this principle of amperometry. It consists of a cathode and an anode enclosed...
Voltammetric Techniques: Linear-Scan (E vs Time)01:12

Voltammetric Techniques: Linear-Scan (E vs Time)

Polarography is a classical voltammetric technique used to analyze electrochemical reactions. This method applies a linear potential sweep to a dropping mercury electrode (DME), and the resulting current is measured. A dropping mercury electrode is commonly used as the working electrode in polarography. It consists of a capillary tube filled with mercury, where the tiny droplet forms at the tip. This droplet continuously drops from the capillary, creating a new electrode surface for each...
Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential ensures...
Voltammetry: Stripping Methods01:13

Voltammetry: Stripping Methods

Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
Potentiometry: Types of Electrodes01:19

Potentiometry: Types of Electrodes

Reference electrodes serve as a stable reference point for potentiometric measurements, while indicator and working electrodes react to variations in the composition of a solution.
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...

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Related Experiment Video

Updated: Jun 28, 2026

Potentiodynamic Corrosion Testing
08:43

Potentiodynamic Corrosion Testing

Published on: September 4, 2016

Corrosion measurements by potential-step chronoamperometry.

R Von Wandruszka1, S W Orchard, A Greeff

  • 1Department of Chemistry, University of the Witwatersrand, Johannesburg, South Africa.

Talanta
|April 1, 1985
PubMed
Summary

A new computer-controlled system measures metal corrosion currents under potentiostatic anodic conditions. This solid-state system efficiently evaluates corrosion behavior in diverse environments.

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Metal Corrosion and the Efficiency of Corrosion Inhibitors in Less Conductive Media
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Metal Corrosion and the Efficiency of Corrosion Inhibitors in Less Conductive Media

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Determining Tribocorrosion Rate and Wear-Corrosion Synergy of Bulk and Thin Film Aluminum Alloys
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Determining Tribocorrosion Rate and Wear-Corrosion Synergy of Bulk and Thin Film Aluminum Alloys

Published on: September 11, 2018

Related Experiment Videos

Last Updated: Jun 28, 2026

Potentiodynamic Corrosion Testing
08:43

Potentiodynamic Corrosion Testing

Published on: September 4, 2016

Metal Corrosion and the Efficiency of Corrosion Inhibitors in Less Conductive Media
10:05

Metal Corrosion and the Efficiency of Corrosion Inhibitors in Less Conductive Media

Published on: November 3, 2018

Determining Tribocorrosion Rate and Wear-Corrosion Synergy of Bulk and Thin Film Aluminum Alloys
07:12

Determining Tribocorrosion Rate and Wear-Corrosion Synergy of Bulk and Thin Film Aluminum Alloys

Published on: September 11, 2018

Area of Science:

  • Electrochemistry
  • Materials Science
  • Corrosion Engineering

Background:

  • Accurate measurement of corrosion currents is crucial for understanding material degradation.
  • Potentiostatic anodic polarization is a key technique for studying metal corrosion.
  • Existing systems may lack automation and efficient data handling capabilities.

Purpose of the Study:

  • To develop a novel solid-state, computer-controlled system for measuring corrosion currents.
  • To enable automated potential step application and current measurement.
  • To facilitate efficient data storage and manipulation for corrosion analysis.

Main Methods:

  • Implementation of a solid-state electronic system.
  • Computer control for applying potential steps and measuring current responses.
  • Cyclic measurements under potentiostatic anodic conditions.
  • Automated data acquisition, storage, and processing.

Main Results:

  • Successful development of a computer-controlled system for corrosion current measurement.
  • Demonstrated capability to perform variable cycles of potential steps and current monitoring.
  • Validation of the system's effectiveness in evaluating metal corrosion behavior.
  • Effective data handling and manipulation facilitated by computer integration.

Conclusions:

  • The developed solid-state system provides an efficient and automated approach for corrosion current measurement.
  • This technology allows for comprehensive evaluation of metal corrosion characteristics in various environments.
  • The computer-controlled nature enhances precision and data analysis in corrosion studies.