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Holiday [1]

The term used to describe an abrasion or flaw in a protective coating. 

Even a pinhole-size defect (holiday) in the protective coating of an underground storage tank [2] can expose the steel surface to electrolytes, and become a focal point for corrosion.

Source URL (modified on 10/21/2014): https://testing.pei.org/wiki/holiday

Links
[1] https://testing.pei.org/wiki/holiday
[2] https://testing.pei.org/node/300