A comparative study of the cyclic thermal oxidation of PVD nickel aluminide coatings

He, Ju-Liang; Yu, Cheng-Chi; Leyland, A.; Wilson, Andrew; Matthews, A.

doi:10.1016/s0257-8972(02)00025-7

Cited by 46 publications

(18 citation statements)

References 31 publications

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“…Approaches that are more popular are to use coatings or sacrificial baffles. Aluminide coatings, which form a protective oxide layer of Al 2 O 3 , and chromized coatings (Cr 2 O 3 ), have been found to be effective in minimising high temperature corrosion [11][12][13]. An aluminide coating on cheaper stainless steels may provide engineers with a high corrosion resistance material at an affordable price.…”

Section: High Temperature Corrosion In Waste-to-energy Facilitiesmentioning

confidence: 99%

Investigation into high-temperature corrosion in a large-scale municipal waste-to-energy plant

et al. 2010

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High-temperature corrosion in the superheater of a large-scale waste-to-energy plant was investigated. A comparison of nickel-/iron-based alloys and austenitic stainless steel probes placed in the furnace demonstrated that temperature and particle deposition greatly influence corrosion. Nickel-based alloys performed better than the other metal alloys, though an aluminide coating further increased their corrosion resistance. Sacrificial baffles provided additional room for deposit accumulation, resulting in vigorous deposit-induced corrosion. Computational modelling (FLUENT code) was used to simulate flow characteristics and heat transfer. This study has shown that the use of aluminide coatings is a promising technique for minimising superheater corrosion in such facilities.

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Section: High Temperature Corrosion In Waste-to-energy Facilitiesmentioning

confidence: 99%

Investigation into high-temperature corrosion in a large-scale municipal waste-to-energy plant

et al. 2010

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“…The spalled oxide from the coated substrate presents practically a constant weight. The surface morphologies of the corrosion products formed on the ferritic steels are presented [17] in Fig. 5.…”

Section: Influence Of Al Coating On Cyclic Oxidation Resistancementioning

confidence: 99%

“…Isothermal tests in the temperature range of 800-1,000°C revealed that the oxidation mass gain of FeAl-coated substrates was lower than that of uncoated specimens. A NiAl coating deposited on AISI 304 and Inconel 600 steels by PVD provided good cyclic-oxidation resistance [17]. At 1,100°C, the coating formed a stable alpha-alumina scale on the substrate surface, which resisted further oxidation.…”

Section: Introductionmentioning

confidence: 99%

Improvement of 9% Ferritic Steel Against Cyclic Oxidation by CVD-FBR Al–Mn Coating

et al. 2007

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Cyclic-oxidation tests were performed on uncoated and Al-Mn coated P92 stainless steels in air at 650°C. SEM and X-ray analyses revealed the formation of iron-chromium spinel, magnetite and hematite on uncoated steel, which spalled dramatically. The aluminized substrate promoted the formation of a continuous, adherent alpha-alumina scale. The formation of this protective alumina layer depended mainly on the characteristics of the initial aluminide coating. A coating with high aluminum content allowed the formation of an alumina oxide, which cracked easily during thermal cycling. The improvement of the cyclic-oxidation resistance was provided by the alumina scale obtained on the coating with lower Al content. COSP modeling showed good performance by surface coating. Aluminum coating is able to extend metal life by the delaying time to reach crossover.

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“…The number of authors have suggested the use of MCrAlY (M is Ni and/or Co) overlays and Pt-aluminide diffusion coatings as typical bond coats to protect the superalloy against oxidation and to reduce the mismatch stresses between the top coat and the superalloy [8][9][10][11][12][13].…”

Section: Coating Alloy/powdersmentioning

confidence: 99%

Analytical Studies on the Behavior of Nickel- and Cobalt-Base Shrouded Plasma Spray Coatings at Elevated Temperature in Air

Sidhu

Prakash

2007

Oxid Met

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Nickel-and Cobalt-base coatings were developed on boiler-tube steels by the argon-shrouded, plasma spray process. The cyclic behavior of bare and coated boiler-tube steels has been studied in air at 900 8C. Four types of coatings were used: Ni-22Cr-10Al-1Y (NiCrAlY), Ni-20Cr, Ni 3 Al and Stellite-6 (St-6). The NiCrAlY has also been used as a bond coat of approximately 150 mm thick before the final coating in all the cases. Oxidation products analyzed in the scale are mostly oxides of the elements present in the coatings and substrate steels. NiCr 2 O 4 and CoCr 2 O 4 spinels are the most-common observed phases in the scale for nickel-and cobalt-base coatings. The internal oxidation of coatings and diffusion of iron from the base steel to the upper scale occurred during the study. Cracks formed in the scale and coating and may be due to differences in composition of coatings, bond coat, substrate and oxides formed.

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A comparative study of the cyclic thermal oxidation of PVD nickel aluminide coatings

Cited by 46 publications

References 31 publications

Investigation into high-temperature corrosion in a large-scale municipal waste-to-energy plant

Investigation into high-temperature corrosion in a large-scale municipal waste-to-energy plant

Improvement of 9% Ferritic Steel Against Cyclic Oxidation by CVD-FBR Al–Mn Coating

Analytical Studies on the Behavior of Nickel- and Cobalt-Base Shrouded Plasma Spray Coatings at Elevated Temperature in Air

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