Leafing

Definition - What does Leafing mean?

Leafing is a term to describe a heavily corroded surface that is physically withering away due to build up and pressure along its grain boundary. Leafing is much more common in aluminum and copper-nickel alloyed metals.

Corrosionpedia explains Leafing

Leafing is a result of intergranular corrosion in which two or more grain boundaries interact in a high force and pressure manner, effectively clashing to expel granular surface microstructure. It often begins at grain-end locations such as edges, holes, and weld points. Material damage due to leafing occurs on a layer-by-layer basis.

This definition was written in the context of Corrosion
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