ASTM D5162 EBOOK DOWNLOAD
Task groups within both ASTM and CEN (ISO) have been doing work on existing . The ASTM practise, D provides a table of suggested test voltages for. 25 Jul ASTM D Standard Practice for Discontinuity (Holiday) Testing of Nonconductive Protective Coat_专业资料。rubber lining test. Designation: D – 00Standard Practice for Discontinuity (Holiday) Testing of Nonconductive Protective.
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Link to Active This link will always route to the current Active version of the standard.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard astm d5162 are not provided as astm d5162 of the standard. For concrete surfaces, refer to Practice D Although a low voltage tester can be used without damaging the coating, it may also produce erroneous results.
This practice provides a procedure for electrical detection of minute discontinuities astm d5162 nonconductive coating systems. Historical Version s – view previous versions of standard.
astm d5162 Its use on a coating previously exposed to an immersion condition has often resulted in damage to the coating and has produced erroneous detection of discontinuities due to permeation or moisture absorption of the coating. Deposits may also be present on the surface causing telegraphing current traveling through a moisture path to astm d5162 discontinuity, giving an erroneous indication or current leakage across the surface of the coating due to contamination.
The use of a high voltage tester on previously exposed coatings has to be carefully considered astm d5162 of possible spark-through, which will damage an otherwise sound coating.
The allowable number of discontinuities should be determined prior to conducting this test since the acceptable quantity of discontinuities will vary depending on coating film thickness, design, and service conditions. astm d5162
astm d5162 The degree of coating continuity required is dictated by service conditions. Discontinuities in a coating are frequently very minute and not readily visible.
High voltage spark test equipment is generally used for astm d5162 the astm d5162 of discontinuities in coating films having a total thickness of greater than 0. Consult the coating manufacturer for proper test equipment and inspection voltages.
Suggested starting voltages are provided in Table 1. Atmospheric conditions astm d5162 also astm d5162 considered since the voltage required for the spark to gap a given distance in air varies with the conductivity of the air at the time the test is conducted.
Solvents retained in an uncured coating film may form an d51622 conductive path through the film to the substrate. The values given in parentheses are for information only. It is the responsibility of the user of this standard to establish astm d5162 safety and health practices and determine the applicability of regulatory limitations astm d5162 to use.