High Temperature Oxidation and Hot Corrosion Behavior of Enamel/Sputtered NiCrAlY Composite Coating

J Chin Soc Corr Pro

2005, Vol. 25

Issue (6): 344-350 DOI:

Research Report

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High Temperature Oxidation and Hot Corrosion Behavior of Enamel/Sputtered NiCrAlY Composite Coating

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Abstract High temperature oxidation and hot corrosion behavior of sputtered NiCrAlY and enamel/NiCrAlY composite coating have been studied. The results indicated that at 900℃ an Al2O3 scale formed on the sputtered NiCrAlY coating, which offered good protectiveness. The coating with enamel overlayers greatly improved the oxidation behavior of NiCrAlY coating. No obvious oxidation scale was formed at the boundary of coating and enamel. At 850℃, the coating with enamel overlayers exhibited more excellent hot corrosion resistance in the molten salt than sputtered NiCrAlY coating. Neither internal sulfidation nor oxidation occurred on the samples with the enamel coating and the composition of the enamels changed little.

Key words: sputter enamel/NiCrAlY composite coating hot corrosion

Received: 01 September 2004

ZTFLH:

TG146.2

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. High Temperature Oxidation and Hot Corrosion Behavior of Enamel/Sputtered NiCrAlY Composite Coating. J Chin Soc Corr Pro, 2005, 25(6): 344-350 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2005/V25/I6/344

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