NACE SP0188-2006 Standard Practice Discontinuity (Holiday) Testing of New Protective Coatings on Conductive Substrates

This standard practice provides a procedure for electrical detection of minute discontinuities in new coating systems that are applied to conductive substrates. This standard describes procedures for determining discontinuities using two types of test equipment: low-voltage wet sponge testers and high-voltage spark testers. This standard is intended for reference in coating specifications or other documents and may be used by specifiers, applicators, and coating inspectors if a specification requires holiday detection on conductive substrates. For the purposes of this standard, the term "coating" can refer either to atmospheric or immersion service.