Corrosion

Overview

Engineering reference data for Corrosion in material science and properties.

Key Formulas

Stress

$\sigma = \frac{F}{A}$

Force per unit area.

Strain

$\varepsilon = \frac{\Delta L}{L_0}$

Change in length per original length.

Hooke's Law

$\sigma = E \varepsilon$

Stress proportional to strain in elastic region.

Thermal Expansion

$\Delta L = \alpha L_0 \Delta T$

Length change due to temperature.

Variables

Types of Corrosion

Corrosion can manifest in several forms, each with distinct characteristics and impacts on engineering systems. The main types include:

• Uniform Corrosion: A general attack over the entire surface, often predictable and manageable.
• Pitting Corrosion: Highly localized, creating small pits that can lead to rapid failure.
• Galvanic Corrosion: Arises from the electrochemical interaction between dissimilar metals in the presence of an electrolyte.
• Crevice Corrosion: Occurs in confined spaces where oxygen depletion or ion concentration changes.
• Concentration Cell Corrosion: Driven by variations in the concentration of chemicals in the environment.
• Graphitic Corrosion: A form of dealloying in cast irons, leaving behind a weakened graphite structure.

References

• Original Source