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The Cathodic Disbondment test examines the ability of a coating under immersion conditions to withstand the stresses imposed by an electric potential which at holidays in the coating (deliberately made for the test) creates local reaction resulting in a highly caustic environment.  This test simulates conditions on pipelines where cathodic protection is being used.  The temperature of the fluids in which the samples are immersed and the potential for the test can be varied in order to better simulate field conditions and determine the resistance of the coating to disbondment around the initial holiday.

Test Capabilities:
Temperature: 20 to 95°C (68 to 200°F) as per standard requirement or modified higher or lower temperatures as per client’s request
Electrolyte: 3% NaCl or a mixture of various salts depending on the test method

Sample Requirements:
•    4”×4” flat panels (CSA Z245.20 and CSA Z245.21)
•    Minimum 5”×6” flat panels (ASTM G95)
•    Minimum 8” length external coated pipe samples (ASTM G8, G42, and G80)
•    Minimum 150 mm × 70 mm × 2 mm (ISO 15711)

Test Methods:
•    ASTM G8
•    ASTM G42
•    ASTM G80
•    ASTM G95
•    ISO 15711
•    CSA Z245.20 Section 12.8
•    CSA Z245.21 Section 12.3

 CD setup

Charter Coating’s Cathodic Disbondment Cells and High Temperature setup