SOLVENTBORNe EPOXY coating – ADDIGUP^® AS

Test: Taber abrasion test

Adding a concentration of ADDIGUP® AS of 8 wt% the abrasion resistance of the coating increases of 60%

SOLVENT-BORNE two component epoxy formulation – ADDIGUP^® AS

Test: immersion test (ISO 2812-2) & neutral salt spray test (ISO 9227)

ADDIGUP^® AS was subjected to extensive industry-standard tests during development, including the ASTM-prescribed salt fog test. Excellent results recently achieved by more clients.

Particular interesting are the results from a client from Bavaria with ADDIGUP^® AS. The coatings evaluated by the client, with and without ADDIGUP^® AS, were applied on R4 steel grade panels of 100×75 mm².

Immersion tests (ISO 2812-2 ) were performed to evaluate the resistance of the coatings to water immersion. The coatings with ADDIGUP® AS passed 3000 hours of immersions, achieving the Im2 (high) category whereas the coating without graphene not reached the 2000 hours.

The coatings were also exposed to neutral salt spray conditions to evaluate the resistance to a saline corrosive environment (ISO 9227). The failure of the coating without graphene, considering the high amount of ferric corrosion and the presence of a blister in the coating and the corrosion exceeding 1 mm from the scratch on the scribed samples, was estimated at 783 hours. On the other hand, the coating using ADDIGUP® AS, with a concentration of graphene of 0.35 wt% overcame the 2860 h of exposure to salt spray, showing no ferric corrosion coming from the steel substrates, and proving an effective protection in such an aggressive atmosphere.

Thus, the graphene-based coating was classified as belonging to the C5-M (high) category (ISO 12944-6).