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Properties of Titanium-Nitride for High-Level Waste Packaging Enhancement

C. C. Scheffing, K. Jagannadham, M.-S. Yim, M. A. Bourham, J. C. Farmer, J. J. Haslam, S. D. Day, D. V. Fix, N. Y. Yang

Nuclear Technology

Volume 156 / Number 2 / November 2006 / Pages 213-221


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A feasibility study of applying titanium-nitride (TiN) coating onto waste package surfaces was performed as part of efforts to enhance the long-term performance of high-level waste packages. The hypothesis examined in the study is that a successful TiN coating would provide an effective mass-transport barrier thus preventing corrosion. In the present work, single-layer TiN and multiple-layer TiN + Ti, TiN + Ti + TiN, and ZrO2 + TiN were deposited on Type 316L stainless steel substrates. The coated samples were tested for corrosion properties in different types of water using polarization and weight loss tests. Results of corrosion testing are presented and discussed.

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