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Corrosion

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...

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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.
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Related Experiment Video

Updated: Aug 10, 2025

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

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

Published on: November 3, 2018

Low-Cost Technologies Used in Corrosion Monitoring.

Mahyad Komary¹, Seyedmilad Komarizadehasl¹, Nikola Tošić¹

¹Department of Civil and Environment Engineering, Universitat Politècnica de Catalunya, BarcelonaTech. C/ Jordi Girona 1-3, 08034 Barcelona, Spain.

Sensors (Basel, Switzerland)

|February 11, 2023

Summary

This review explores low-cost sensors for corrosion monitoring in structures. It highlights electrochemical and physical methods suitable for predictive maintenance and construction applications.

Keywords:

atmospheric corrosion corrosion monitoring data acquisition data analysis electrochemical sensors low-cost sensors physical methods structural health monitoring

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Published on: September 11, 2018

Area of Science:

Materials Science
Civil Engineering
Electrochemistry

Background:

Corrosion significantly degrades metallic and concrete structures, causing substantial financial losses and safety risks.
Effective corrosion monitoring is crucial for assessing structural integrity and enabling predictive maintenance.
Current high-cost monitoring systems limit their widespread application, particularly in civil structures.

Purpose of the Study:

To systematically review state-of-the-art electrochemical and physical corrosion monitoring methods.
To identify low-cost sensor technologies compatible with data acquisition devices.
To explore in situ applications of these methods across various industries.

Main Methods:

Systematic literature review of electrochemical and physical corrosion monitoring techniques.
Analysis of sensor compatibility with low-cost data acquisition devices.
Focus on methods applicable to metallic and concrete structures.

Main Results:

Identified various low-cost electrochemical and physical methods for corrosion detection.
Demonstrated the feasibility of using affordable sensors for in situ monitoring.
Highlighted common microcontrollers like Arduino for implementation.

Conclusions:

Low-cost sensors offer a viable solution for widespread corrosion monitoring.
These technologies can significantly aid the construction industry in managing structural health.
Further research can optimize techniques for enhanced predictive maintenance.