Acta Metallurgica Sinica (English Letters) >
Hot Corrosion Behavior of a Cr-Modified Aluminide Coating on a Ni-Based Superalloy
Received date: 2013-11-21
Revised date: 2014-01-09
Online published: 2014-10-16
A Cr-modified aluminide coating is prepared on a Ni-based superalloy using arc ion plating and subsequent pack cementation aluminizing. Hot corrosion behavior of the Cr-modified aluminide coating exposed to molten Na2SO4/K2SO4 (3:1) or Na2SO4/NaCl (3:1) salts at 900 °C in static air are evaluated as well as the aluminide coating. The results indicate that compared with the aluminide coating, the anti-corrosion properties of the Cr-modified aluminide coating in the both salts are improved, which should be attributed to the beneficial effect of the Cr in the coating. The corrosion mechanism of the Cr-modified aluminide coating, especially the role of Cr in the mixture salt corrosion, is discussed.
Duoli Wu , Sumeng Jiang , Qixiang Fan , Jun Gong , Chao Sun . Hot Corrosion Behavior of a Cr-Modified Aluminide Coating on a Ni-Based Superalloy[J]. Acta Metallurgica Sinica (English Letters), 2014 , 27(4) : 627 -634 . DOI: 10.1007/s40195-014-0108-5
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