Alligatoring


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alligatoring

[′al·ə‚gād·ər·iŋ]
(materials)
Cracking of a film of paint or varnish, with broad, deep cracks through one or more coats. Also known as crocodiling.
(metallurgy)
A splitting of an end of a rolled steel slab in which the plane of the split is parallel to the rolled surface. Also known as fishmouthing.
The roughening of a sheet-metal surface during forming due to the coarse grain of the metal used.

Alligatoring

A defect in a painted surface, appearing like alligator hide, from the application of a hard finishing coat over a soft primer coat, when the new coat cracks and slips over the old coat, exposing it to view.

alligatoring

1. The splitting of a film of paint in a pattern resembling an alligator skin, caused by shrinkage of a coat of paint applied over a semiplastic or thermoplastic undercoat; also called crocodiling.
2. Surface cracking, due to oxidation and shrinkage stresses, which shows as repetitive mounding of an asphalt surface in a pattern resembling the hide of an alligator; occurs only in unsurfaced bitumen exposed to the weather.