Email Address required No spam, ever. If we need more information, our engineers will contact you. They are intended for use with samples of coated pipe taken from commercial production and are applicable to such samples when the coating is characterized by function as an electrical barrier. This test method provides accelerated conditions for cathodic disbondment to occur and provides a measure of resistance of coatings to this type of action. Zeeat and let us know how we can assist you in your investigation. The effects of the test are to be evaluated by physical examinations and monitoring the current drawn by the test specimen. An intermediate zone of decreased adhesion may also be present.

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Email Address required No spam, ever. Usually there is no correlation between the two methods of evaluation, but both methods are significant. Prior to placement in the electrolyte the coating is intentionally damaged holiday in one or more locations to provide a site where edge corrosion may occur.

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. This is appropriate when it is impractical to submerge or immerse the test specimen as required by Test Methods G 8, G 42, or G Applied cathodic protection potentials may cause loosening of the coating, beginning at holiday edges.

If we need more information, our engineers will contact you.

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Accelerated Life Testing Touchstone performs corrosion testing and accelerated life testing of virtually any material or device. Breaks or holidays in pipe coatings may expose the pipe to possible corrosion since, after a pipe has been installed underground, the surrounding earth will be moisture-bearing and will constitute an effective electrolyte. It is usually found that the cathodically disbonded area propagates from an area where adhesion zstm zero to an area where adhesion reaches the original level.

Whether you are a large corporation or a small enterprise, we will provide you with the attention you need and deserve. Among the tests offered are: They are intended for use with samples of coated pipe taken from commercial production and are applicable to such samples when the coating is h95 by function as an electrical barrier.

Breaks or holidays in pipe sstm may expose the pipe to possible corrosion since, after a pipe has been installed underground, the surrounding earth will be moisture-bearing and will constitute an effective electrolyte. Physical examination consists of assessing the effective contact of the coating with the metal surface in terms of observed differences in the relative adhesive bond.

Spontaneous holidays may also be caused by such potentials. The sample is then allowed to remain in the electrolyte for 30 days after which time the edges of the holiday s are evaluated to determine the extent of disbondment. This standard does not purport to address all of the safety concerns, if any, associated with its use. Touchstone Research Laboratory, Ltd. That is a promise. This test method provides accelerated conditions for cathodic disbondment to occur and provides a measure of resistance of coatings to this type of action.

Damage to pipe coating is almost unavoidable during astmm and g5.

ASTM G95: Cathodic Disbondment Test

In so doing, we hope to work with you for many years to come. The electrolyte zstm a mixture of various salts including NaCl, KCl, and sodium bicarbonate. An intermediate zone of decreased adhesion may also be present. This test method covers accelerated procedures for simultaneously determining comparative characteristics of coating systems applied to steep pipe exterior for the purpose of preventing or mitigating corrosion that may occur in underground service where the pipe will be in contact with natural soils and will receive cathodic protection.

Among asmt tests offered are:. Link to Active This link will always route to the current Active version of the standard.

Touchstone performs corrosion testing and accelerated life testing of virtually any material or device. Coating Standards Cathodic Protection Standards.

Referenced Documents purchase separately The documents listed below are referenced aztm the subject standard but are not provided as part of xstm standard. An intermediate zone of decreased adhesion may also be present. The virtue of this test method is that all dielectric-type coatings now in common use will disbond to some degree, thus providing a means of comparing one coating to another.

Astm g95 free download

The effects of the test are to be evaluated by physical examinations and monitoring the current drawn by the test specimen. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. They are intended for use with samples of coated pipe taken from commercial production and are applicable to such samples when the coating is characterized by function as an electrical barrier.