Note 1: ,The property of corner coverage has also been referred to as “,edge coverage,”, though the latter is not recommended. There are widespread misunderstandings and expectations relative to the term “,edge coverage.”, This test is performed on a steel bar having square corners and the results do not necessarily relate to edges that are sharper, that is, burrs. A coating that has measurable corner coverage may still not protect sharper edges from corrosion or provide the electrical insulation needed in some applications.