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Zentek Completes Testing of ZenARMOR(TM) Corrosion Prevention Technology as part of its Innovative Solutions Canada Testing Stream and Announces a New Collaboration with Jazeera Paints Company

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GUELPH, ON / ACCESS Newswire / April 16, 2025 / Zentek Ltd. ("Zentek" or the "Company") (Nasdaq:ZTEK)(TSXV:ZEN), an intellectual property technology development and commercialization company, announces the completion of the Innovative Solutions Canada -Testing Stream contract for ZenARMOR™ nano-pigment in military grade, chromate-free corrosion protection aerospace paint systems, and a new collaboration with Jazeera Paints Company for continued product development and testing.

  • ZenARMOR™ was evaluated in commercial non-chromate aviation paint systems developed by PPG and Akzo Nobel

  • Three rounds of corrosion testing were completed from September 2023 to July 2024

  • Testing followed ASTM B117 (salt spray) and ASTM D5894 (cyclical corrosion) standards

  • The tests were successful in demonstrating the effectiveness of ZenARMOR™ nano-pigments in inhibiting corrosion of the aluminum alloy AA2024-T3

  • Zentek has begun a collaboration with Jazeera Paints, headquartered in Riyadh, Saudi Arabia to evaluate ZenARMOR™ in their existing product lines

ZenARMOR™

On June 22, 2023, Zentek announced it was awarded a research and development contract through Innovative Solutions Canada to test ZenARMOR™ nano-pigment in military grade, chromate-free corrosion protection aerospace paint systems conducted by the Aerospace Research Centre's Aerospace Manufacturing Technologies Centre of the National Research Council of Canada ("NRC").

Testing began on September 2023 with Zentek providing three separate batches of aluminum alloy AA2024-T3 coupons that were coated with commercial, chromate-free corrosion aerospace paint system produced by PPG Industries, Inc. and Akzo Nobel N.V. as positive controls, and the same paint systems enhanced with ZenARMOR™ nano-pigment. The coupons were subject to test conditions according to ASTM B117 and ASTM D5894 standards. After the first two rounds of testing, ASTM D5894 was used for the final rounds as the cyclical corrosion test corresponds more closely to real-world conditions.

In the final round of testing, scribed and non-scribed test coupons were subjected to 2016 hours of corrosion testing. No obvious substrate corrosion or coating defects were observed in either scribed or non-scribed test coupons.

Since there was no observed coating failure, the tests were in general successful in demonstrating the effectiveness of ZenARMOR™ nano-pigments in inhibiting corrosion of the aluminum alloy AA2024-T3. Since the positive control samples demonstrated similar performance, the NRC team recommended additional testing in other corrosion systems or featuring ZenARMOR™ as the sole corrosion inhibiting agent to better evaluate the performance of the nano-pigment in a less optimized coating system.