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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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Its use on a astm d5162 previously astm d5162 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. Consult axtm coating manufacturer for proper test equipment and inspection voltages.

The degree of coating continuity required is dictated by service conditions.

Although a low voltage tester can be used without damaging the coating, it may also produce erroneous results. This practice provides a procedure astm d5162 electrical detection of minute discontinuities in nonconductive coating astm d5162. For concrete surfaces, refer to Practice D Historical Version s – view previous versions of standard.

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The values given in parentheses are for information only. The use of a high voltage tester on previously exposed coatings has to be carefully considered because of possible spark-through, which will damage an astm d5162 sound coating.

Referenced Documents purchase astm d5162 The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Deposits may also be present on the surface causing astm d5162 current traveling through a moisture path to a discontinuity, giving an erroneous indication f5162 current leakage across the surface of the coating due to contamination. High voltage spark test equipment is generally used for astm d5162 the existences of discontinuities in coating films having a total thickness of greater than 0.

Atmospheric conditions shall also be considered since the voltage required for the astm d5162 to gap a given distance in air varies with the conductivity of the air at astm d5162 time the test is conducted. Discontinuities in a coating are frequently very minute and not readily visible.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Solvents retained in an uncured coating film may astm d5162 an electrically conductive path through the film to the substrate. Link to Active This link will always route to the current Active version of the standard. The allowable number of discontinuities should be determined prior to conducting this test since astm d5162 acceptable quantity of discontinuities will vary depending on coating film thickness, design, and service conditions.

Suggested starting voltages are provided in Table 1.