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Understanding Corrosion in Water Pipelines: A Guide for Pipeline Designers

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Leafing

Last updated: April 22, 2016

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.

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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.

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