Advanced coating development for industrial/utility gas turbine engines

Vargas, Julia; Ulion, N. E.; Goebel, J.A.

doi:10.1016/0040-6090(80)90508-8

Cited by 17 publications

(2 citation statements)

References 2 publications

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“…Nickel based alloys are susceptible to hot corrosion and this result in a reduction of the useful life of high temperature gas turbines for aircraft and marine applications (5,6). The hot corrosion resistance of nickel based alloys would therefore have to be improved to satisfy operating requirements and this is most commonly achieved with the use of high temperature protective coatings (9)(10)(11). It is generally desirable for the coatings implemented to have Al and Cr to allow the formation of an adherent, compact Al 2 O 3 scale and to promote the formation of Cr 2 O 3 to improve the hot corrosion resistance (12)(13).…”

Section: Introductionmentioning

confidence: 99%

Type II Hot Corrosion Behaviors of Cr, Al, C Binary and Ternary Thin Film Coatings on Ni-201

Aw¹,

Amendola²,

Gannon³

et al. 2015

ECS Trans.

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In this study, a variety of magnetron sputtered binary and ternary thin film (approximately 1.5 µm thick) coatings using Cr, Al, and C as base elements were deposited onto Ni-201 alloy and investigated before and after exposure to simulated Type II Hot Corrosion environment. Prototypical Na2SO4 was applied to the samples before exposure for 250 hours in an air/SO2 gas mixture at 700 °C. It was determined that all coatings reduced the samples specific mass gains (corrosion rates) when compared to uncoated ones. Binary Al – C and Cr – C coatings were completely dissolved after exposure testing and NiO was the only compound detected on the surfaces; whereas continuous layers of and were detected in Cr – Al and Cr – Al – C coated samples, indicating good protection against Type II Hot Corrosion.

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Section: Introductionmentioning

confidence: 99%

Type II Hot Corrosion Behaviors of Cr, Al, C Binary and Ternary Thin Film Coatings on Ni-201

Aw¹,

Amendola²,

Gannon³

et al. 2015

ECS Trans.

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show abstract

“…5,6 The deposit-induced corrosion resistance of nickel based alloys would therefore have to be improved to satisfy operating requirements, which can be achieved with the use of high temperature protective coatings. [8][9][10] It is generally desirable for the implemented coatings to form adherent and compact oxide scales effective in providing protection to the corresponding corrosive environment. Al and Cr are typically used as base elements for their ability to develop Al 2 O 3 and Cr 2 O 3 improving the salt deposited induced corrosion, sulfidation and carburization resistance.…”

mentioning

confidence: 99%

Investigation of Na₂SO₄Deposit Induced Corrosion of Cr, Al, C Binary and Ternary Thin Film Coatings on Ni-201

Amendola

Ryter

et al. 2017

J. Electrochem. Soc.

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Al-C, Cr-C, Al-Cr and Al-Cr-C thin film coatings were sputtered onto Ni-201 substrates. Samples were deposited with 1.0 ± 0.3 mg cm −2 Na 2 SO 4 and exposed to dry air/2 ppm SO 2 gas atmosphere, at 700 • C for 250 hours. Coated samples had reduced corrosion rates relative to uncoated samples. Al-C and Cr-C coatings were not effective since NiO was the only compound detected on the surfaces; in contrast Cr-Al and Cr-Al-C developed protective layers of Al 2 O 3 and Cr 2 O 3 with Cr-Al-C coated samples having the least corrosion rate.

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The influence of yttrium on the Oxidation behaviour of Ni‐23Co‐19Cr‐12Al alloy at high temperatures

Roszczynialska

Jedliński²,

Gil

et al. 1992

Materials & Corrosion

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The effect of 0.6 wt.% yttrium addition on the oxidation behaviour of the coating material Ni‐23Co‐19Cr‐12Al was studied under isothermal and thermal cycling conditions in air at 1373 and 1473 K. The reaction was followed thermogravimetrically while the SEM, EDX, EPMA and X‐ray diffraction techniques were used to characterise the starting materials and the oxidized samples. Intensive spalling and the formation of a deep internal oxidation zone were observed in the case of the yttrium‐free alloy. Yttrium strongly improved the oxidation resistance by substantial suppression of scale spalling and considerable reduction of internal oxidation.

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Advanced coating development for industrial/utility gas turbine engines

Cited by 17 publications

References 2 publications

Type II Hot Corrosion Behaviors of Cr, Al, C Binary and Ternary Thin Film Coatings on Ni-201

Type II Hot Corrosion Behaviors of Cr, Al, C Binary and Ternary Thin Film Coatings on Ni-201

Investigation of Na₂SO₄Deposit Induced Corrosion of Cr, Al, C Binary and Ternary Thin Film Coatings on Ni-201

The influence of yttrium on the Oxidation behaviour of Ni‐23Co‐19Cr‐12Al alloy at high temperatures

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Advanced coating development for industrial/utility gas turbine engines

Cited by 17 publications

References 2 publications

Type II Hot Corrosion Behaviors of Cr, Al, C Binary and Ternary Thin Film Coatings on Ni-201

Type II Hot Corrosion Behaviors of Cr, Al, C Binary and Ternary Thin Film Coatings on Ni-201

Investigation of Na2SO4Deposit Induced Corrosion of Cr, Al, C Binary and Ternary Thin Film Coatings on Ni-201

The influence of yttrium on the Oxidation behaviour of Ni‐23Co‐19Cr‐12Al alloy at high temperatures

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Investigation of Na₂SO₄Deposit Induced Corrosion of Cr, Al, C Binary and Ternary Thin Film Coatings on Ni-201