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Corrosion Potential – Aluminum Alloys

Alloying in solid solution shifts corrosion potential: copper makes alloys more noble (more positive), while zinc makes them more active (more negative). Measuring potential helps evaluate metallurgical condition and process effectiveness in Al products.

Overview

Corrosion potential as a metallurgical indicator

The corrosion potential of aluminum alloys is strongly influenced by alloying elements in solid solution. Copper additions shift the potential to more noble values, while zinc shifts it to more active values. Measuring potential provides a quick, sensitive way to judge metallurgical condition and process effectiveness across Al products.

ISO/IEC 17025:2017 accredited practices and reporting.
Why measure?

What the measurement tells you

Metallurgy

State of precipitation

Track changes from heat treatment, artificial ageing, and welding by observing potential shifts.

Process

Effectiveness of treatments

Verify outcomes of solution heat treating and annealing through reproducible readings.

Quality

Cladding integrity

Assess diffusion of alloying elements from the core into Alclad during processing.

Applications

Typical applications

01

Solution heat treating & annealing

Use corrosion potential to verify thermal processing results.

02

Artificial ageing & welding

Quantify extent of precipitation from ageing and welding procedures.

03

Alclad diffusion

Evaluate diffusion of core alloying elements into cladding in Alclad products.

Get in touch

Talk to an expert

Share alloy grade, temper, and processing history. We’ll confirm the corrosion-potential setup, endpoints, and reporting.

ISO/IEC 17025:2017 accredited · Ahmedabad