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首页> 美国政府科技报告 >Corrosion Resistant Coatings for Ceramic Heat Exchanger Tubes Operating in Highly Corrosive Environments. Annual Report, September 1, 1988-August 31, 1989
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Corrosion Resistant Coatings for Ceramic Heat Exchanger Tubes Operating in Highly Corrosive Environments. Annual Report, September 1, 1988-August 31, 1989

机译：在高腐蚀性环境中操作的陶瓷换热器管的耐腐蚀涂层。年报，1988年9月1日至1989年8月31日

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摘要

Ten ceramic oxide coating systems, including single-layered mullite and multilayered coatings of mullite, zircon, alumina, yttria, and yttria-stabilized zirconia, were exposed to a simulated aluminum reclamation environment at temperatures ranging from 760-1204 C (1400-2200 F) for 2000 hours plus 10 thermal cycles. Corrosion of the silicon carbide tubes increased with decreasing temperature from 1204 C (2200 F) to 760 C (1400 F). Single layer mullite coatings showed superior corrosion resistance, particularly mullite coatings containing a vitreous phase ceramic seal coating on the outer surface. Measurement of silicon carbide tube wall recessions indicated that the coatings which withstood the 2000 hours exposure test without spalling from the substrate were protective, as compared to uncoated silicon carbide tube sections.

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