Galvanic Piping Corrosion

Overview

Engineering reference data for Galvanic Piping 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

Galvanic Series for Piping Materials

Material Definitions and Properties

1. Stainless Steel 316 1): Austenitic stainless steel with increased molybdenum content for enhanced corrosion resistance. Resists scaling at temperatures up to 1600°F (871°C). Used in industrial, marine, and general applications.

2. Stainless Steel 430 2): Ferritic, non-heat-treatable stainless steel with good ductility, formability, corrosion resistance, thermal conductivity, and finish quality. Applications include automotive trim, architectural elements, heat exchangers, and scientific equipment.

3. Stainless Steel 410 3): Martensitic stainless steel that attains high mechanical properties after heat treatment. Offers good impact strength and corrosion resistance up to 1200°F (649°C). Used in cutlery, turbine blades, valve components, and fasteners.

4. Hastelloy 4): Trademark for nickel-based, corrosion-resistant alloys containing molybdenum and chromium. Resistant to pitting, stress-corrosion cracking, and oxidizing atmospheres up to 1900°F (1037°C). Commonly used in chemical processing industries.

References

• Original Source