Immersion in corrosive media
Alloys are immersed in defined environments to evaluate susceptibility to exfoliation corrosion.
Overview
Qualify aluminium alloys against layered intergranular attack
The exfoliation test assesses susceptibility of high-strength aluminium—especially 2xxx and 7xxx series—to a lateral, grain-boundary-related attack that produces a “layered” appearance as corrosion products push metal away from the bulk.
ISO/IEC 17025:2017 accredited practices and reporting.
Definition
What is exfoliation corrosion?
A specialized form of intergranular corrosion where attack proceeds laterally along planes roughly parallel to the surface—often along grain boundaries—causing the metal to lift in layers and separate from the base material.
Approach
Immersion & evaluation
Layered appearance check
Failure is indicated by a characteristic layered morphology as corrosion products force metal away from the bulk.
Risk mitigation
Testing helps manufacturers identify and mitigate risks, supporting durability and reliability.
Applications
Where this testing matters
Airframe alloys
Validate high-strength aluminium alloys in critical structures.
Lightweight components
Screen sheets and extrusions for resistance to exfoliation in service.
Get in touch
Talk to an expert
Send alloy, temper, thickness, and required acceptance criteria. We’ll confirm the test plan, endpoints, and reporting.