The role of silicon in corrosion-resistant high temperature coatings

Grünling, H.W.; Bauer, R.

doi:10.1016/0040-6090(82)90578-8

Cited by 105 publications

(23 citation statements)

References 24 publications

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“…Further, the XRD analysis confirms about the existence of chromium oxide, whereas no peak corresponding to the crystalline Si-related oxide phase has been detected, probably because it is amorphous silica. Yu et al The investigations ( Ref 11,12,15) on the oxidation of Ni-Si-based alloys illustrate that at 1000°C, critical Si concentration is needed to form SiO 2 layer that ranges …”

Section: Discussionmentioning

confidence: 98%

Evaluation of Thermocyclic Oxidation Behavior of HVOF-Sprayed NiCrFeSiB Coatings on Boiler Tube Steels

et al. 2010

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High velocity oxy-fuel (HVOF) spray process has grown into a well-accepted industrial technology for obtaining coatings resistant to significant surface degradation processes. In the present study, HVOF process was used to deposit Ni-based hardfacing NiCrFeSiB alloy powder on kinds of boiler tube steels designated as SA210 grade-A1, SA213-T11, and SA213-T22. The microstructures and several properties of the as-sprayed coatings have been investigated. Thermocyclic oxidation studies were performed in static air at 900°C. NiCrFeSiB-coated steels showed slow oxidation kinetics and considerably lower weight gains than that of uncoated steels. The superior performance of NiCrFeSiB coatings can be attributed to continuous and protective thin oxide scale of amorphous SiO 2 and Cr 2 O 3 formed on the surface of the oxidized coatings. The combined technique of x-ray diffraction, scanning electron microscopy, energy dispersive x-ray analysis, and electron probe microanalysis are used to characterize reaction products of the oxidized surfaces.

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Section: Discussionmentioning

confidence: 98%

Evaluation of Thermocyclic Oxidation Behavior of HVOF-Sprayed NiCrFeSiB Coatings on Boiler Tube Steels

et al. 2010

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“…Nicoll [23] opinioned that the modification of standard MCrAlY coating systems with Si additions of up to 2.7 % leads to an improvement in both oxidation and corrosion resistance. Grunling and Bauer [24] reported that SiO 2 affords a better protection than that of Cr 2 O 3 which is susceptible to vaporization loss by forming CrO 3 at a temperature of about 1,000°C.…”

Section: Discussionmentioning

confidence: 98%

Hot Corrosion Behaviour of HVOF Sprayed (Cr3C2–35 % NiCr) + 5 % Si Coatings in the Presence of Na2SO4–60 % V2O5 at 700 °C

Somasundaram

Kadoli

Рамеш

2014

Trans Indian Inst Met

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The hot corrosion behavior of high velocity oxyfuel sprayed (Cr 3 C 2 -35 % NiCr) ? 5 % Si coatings on three substrate alloys of SA213-T22, MDN-310 and Superfer 800 H was investigated. The as-sprayed coatings are characterized with respect to microstructure and mechanical properties. Thermocyclic hot corrosion studies were performed in a molten salt environment of Na 2 SO 4 -60 % V 2 O 5 for 50 cycles at 700°C. Thermogravimetric technique was used to establish the kinetics of hot corrosion of uncoated and coated steels. It was observed that the coated steel showed better hot corrosion resistance than the uncoated steels. The coated steels follow the parabolic rate law of oxidation and the parabolic rate constant values are appreciably lower in comparison to the uncoated steels. The coated steels showed slow oxidation kinetics which indicated that the reaction rate is diffusion limited. The oxides of Cr 2 O 3 and SiO 2 formed on the outermost surface of the coatings are found to be passive in the molten NaVO 3 melt.

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“…An important example of such surface modification involves the use of silicon, which forms a protective oxide coating on steels and inhibits oxidation, nitridation, erosion, corrosion and carbonization. [4][5][6][7][8][9][10][11][12] The formation of a thin, adherent SiO 2 film, either by using silicon present in solid solution in the alloys or by depositing silicon on the surface from an SiH 4 /H 2 mixture, has been vigorously pursued by Cabrera, Kirner and co-workers and is the basis of a commercial process. 13 Deposition of silicon onto the surface avoids compromising the bulk steel properties, which can be impaired when too high a percentage of silicon is incorporated as part of an alloy composition.…”

Section: Introductionmentioning

confidence: 99%

The reaction of H8Si8O12 with a chromium oxide surface: a model for stainless steel surface modification

Greeley

Lee

Holl

1999

Appl. Organometal. Chem.

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Many metal alloys are susceptible to corrosion, particularly after processing steps such as welding. Chemical vapor deposition (CVD) is an effective way to modify metal surfaces and impart specific physical and chemical properties. A hydrophobic, nanosegmented silicon oxide coating derived from the discrete cluster molecule H8Si8O12 has been shown to chemisorb to 302 and 304 stainless steel. To understand better how this cluster binds to steel, a comprehensive study of these clusters adsorbed on chromium oxide was undertaken. IR, XPS and valence‐band spectroscopies show convincingly that the clusters are chemisorbed intact on this surface. The coating also readily forms on molybdenum, tungsten, iron and nickel oxides, promising general application to a wide variety of metal alloys. Copyright © 1999 John Wiley & Sons, Ltd.

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The role of silicon in corrosion-resistant high temperature coatings

Cited by 105 publications

References 24 publications

Evaluation of Thermocyclic Oxidation Behavior of HVOF-Sprayed NiCrFeSiB Coatings on Boiler Tube Steels

Evaluation of Thermocyclic Oxidation Behavior of HVOF-Sprayed NiCrFeSiB Coatings on Boiler Tube Steels

Hot Corrosion Behaviour of HVOF Sprayed (Cr3C2–35 % NiCr) + 5 % Si Coatings in the Presence of Na2SO4–60 % V2O5 at 700 °C

The reaction of H8Si8O12 with a chromium oxide surface: a model for stainless steel surface modification

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