Hot corrosion behavior of a Cr-modified aluminide coating on a Ni-based superalloy

Duoli Wu; Sumeng Jiang; Qixiang Fan; Jun Gong; Chao Sun

doi:10.1007/s40195-014-0108-5

Hot corrosion behavior of a Cr-modified aluminide coating on a Ni-based superalloy

Duoli Wu, Sumeng Jiang, Qixiang Fan, Jun Gong, Chao Sun

Chinese Academy of Sciences

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

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.

Original language	English
Journal	Acta Metallurgica Sinica
Volume	27
Issue number	4
Pages (from-to)	627-634
ISSN	1006-7191
DOIs	https://doi.org/10.1007/s40195-014-0108-5
Publication status	Published - 2014
Externally published	Yes

Keywords

Arc Ion Plating
Pack Cementation Aluminizing
Superalloy
CR-modified Aluminide Coating
Hot Corrosion

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title = "Hot corrosion behavior of a Cr-modified aluminide coating on a Ni-based superalloy",

abstract = "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.",

keywords = "Arc Ion Plating, Pack Cementation Aluminizing, Superalloy, CR-modified Aluminide Coating, Hot Corrosion",

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T1 - Hot corrosion behavior of a Cr-modified aluminide coating on a Ni-based superalloy

AU - Wu, Duoli

AU - Jiang, Sumeng

AU - Fan, Qixiang

AU - Gong, Jun

AU - Sun, Chao

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

KW - Arc Ion Plating

KW - Pack Cementation Aluminizing

KW - Superalloy

KW - CR-modified Aluminide Coating

KW - Hot Corrosion

U2 - 10.1007/s40195-014-0108-5

DO - 10.1007/s40195-014-0108-5

M3 - Journal article

SN - 1006-7191

VL - 27

SP - 627

EP - 634

JO - Acta Metallurgica Sinica

JF - Acta Metallurgica Sinica

IS - 4

ER -

Hot corrosion behavior of a Cr-modified aluminide coating on a Ni-based superalloy

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