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Related Concept Videos

Corrosion02:49

Corrosion

The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...
Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
Corrosion of Reinforcement01:27

Corrosion of Reinforcement

The corrosion of steel reinforcement within concrete is a process influenced by the material's inherent properties and external factors. The high pH level of around 13, provided by calcium hydroxide present in concrete, initially protects the steel reinforcement by promoting the formation of a passive iron oxide layer on its surface.
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
Electrodeposition01:08

Electrodeposition

Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Microbial Corrosion01:24

Microbial Corrosion

Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...
Development of Analytical Methods01:21

Development of Analytical Methods

An analytical methodology can be divided into four sequential steps: technique, method, procedure, and protocol. A technique is a scientific principle that rationalizes a specific phenomenon through chemical measurements. Adapting a technique for analyzing a sample of interest is termed a method. The procedure outlines the directions for performing the analysis via an analytical method. The protocol is the detailed guidelines on the procedure, which should be strictly followed to obtain the...

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Related Experiment Video

Updated: Jun 28, 2026

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

Analytical techniques for corrosion studies on noble metals.

A Varma1

  • 1Laboratory for Research on the Structure of Matter, University of Pennsylvania Philadelphia, PA 19104, U.S.A.

Talanta
|September 1, 1981
PubMed
Summary

Analytical methods like potentiometry, polarography, and atomic-absorption spectrophotometry effectively monitor low corrosion rates for gold, silver, and palladium. These techniques can detect ng/ml concentrations with high accuracy.

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Potentiodynamic Corrosion Testing
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Last Updated: Jun 28, 2026

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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Potentiodynamic Corrosion Testing
08:43

Potentiodynamic Corrosion Testing

Published on: September 4, 2016

Area of Science:

  • Materials Science
  • Electrochemistry
  • Analytical Chemistry

Background:

  • Corrosion of precious metals like gold, silver, and palladium is a critical concern in various industrial applications.
  • Accurate monitoring of low corrosion rates is essential for material longevity and performance prediction.

Purpose of the Study:

  • To investigate the suitability of different analytical methods for studying precious metal corrosion.
  • To compare the effectiveness of potentiometry, polarography, and atomic-absorption spectrophotometry in electrolyte analysis.

Main Methods:

  • Potentiometry utilizing ion-selective electrodes.
  • Polarography.
  • Atomic-absorption spectrophotometry.

Main Results:

  • All three methods are effective for analyzing low corrosion rates in electrolytes.
  • Each method presents unique advantages and limitations for corrosion monitoring.
  • Detection of concentrations in the ng/ml range with less than 10% error is routinely achievable.

Conclusions:

  • Potentiometry, polarography, and atomic-absorption spectrophotometry are valuable tools for assessing precious metal corrosion.
  • These methods offer reliable quantification of low-level metal ion concentrations in corrosive environments.