Results 311 to 320 of about 148,601 (342)

Hot corrosion studies of zirconia ceramics

Surface and Coatings Technology, 1987
Abstract The corrosion of stabilized zirconia ceramics by vanadic salts at 700 – 900 °C was investigated to elucidate the mechanisms of attack, and to determine inter alia the effects of the chemical reactivity of the stabilizing oxide (CeO 2 , Y 2 O 3 ) and of the physical structure of the zirconia (sintered, rapidly solidified (RS), single ...
R.L. Jones, C.E. Williams
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Hot Corrosion of Protective Coatings

Materials and Manufacturing Processes, 2000
Abstract Abstract Improvement in efficiencies of gas turbine engines requires a significant increase of gas inlet temperatures. This results in an increased service temperature for blade materials and consequently in enhanced oxidation and hot corrosion attack of the blade coatings, which are usually of MCrAlY type where M is Ni, Co or NiCo.
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Zinc Sulfate Reactions in Hot Corrosion

Journal of The Electrochemical Society, 1986
Comparaison de la corrosion de CoCrAlY (alliage de revetement des pales de turbine a gaz) revetu par pulverisation de 50% molaire ZnSO 4 −Na 2 SO 4 , et du meme alliage revetu par pulverisation de Na 2 SO 4 seul a 700 et 850°C, dans de l'air contenant du SO 3 a pression partielle controlee.
R. L. Jones, C. E. Williams
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Corrosion Prevention —: HOT‐DIP GALVANIZING

Anti-Corrosion Methods and Materials, 1963
The hot‐dip galvanizing process had its inception in the work carried out by a French chemist, P. J. Melouin, about the year 1742. The industrial application of a zinc coating to iron and steel articles by hot dipping dates back to the late 1830s, and galvanizing works are known to have existed in London and the Midlands at about that time.
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Titanium Corrosion by a Hot Perfluoropolyether

Corrosion, 1980
The kinetics and mechanism of titanium corrosion by Krytox MLO-71-6 are reported. The rate of corrosion is found to be dependent on the presence of molecular oxygen in the environment. For titanium corrosion to occur, the lubricant chains must first break down into smaller reactive molecules.
Wayne L. Chandler, Lindsay B. Lloyd, Michael M. Farrow, Roger K. Burnham, Edward M. Eyring   +4 more
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Hot Salt Stress Corrosion Studies.

1978
Abstract : Effects of various flight-cycle simulations, maximum temperature, and microstructure were investigated using a concept analogous to a low-cycle fatigue (LCF) study. Isothermal stress cycling increased HSSC threshold stress over static loading.
A. J. Luzietti, R. L. Fowler
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Hot corrosion cracking of stainless steel

Materials and Corrosion, 1982
AbstractInvestigations have been carried out to study the hot corrosion cracking and crack propagation in 304 type stainless steel at 700°C. Kerosene was used as the base fuel to which CS2 was added in controlled quantities to obtain different sulphur contents (2.5% and 5%). Crack propagation tests were carried out at three stress levels.
V. M. Radhakrishnan, K. J. L. Iyer, S. R. K. Iyer   +2 more
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Hot Corrosion of Oxide Ceramics

1994
The hot corrosion of oxide ceramics is described by examining the hot corrosion of A12O3, SiO2 and Y2O3 — stabilized ZrO2 in Na2SO4 and Na2SO4 — NaVO3 solutions at temperatures between 700° and 1000°C. Depending upon the properties of the molten deposit and the oxide ceramics a number of hot corrosion processes are possible. Acidic or basic dissolution
F.S. Pettit, G.H. Meier, J.R. Blachere
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Studies on V2O5 induced hot corrosion

Materials Chemistry and Physics, 1987
Abstract Nickel samples coated with a monitored thickness of vanadium pentoxide were oxidized at 900°C under various oxygen pressures. The microstructures of the thin film grown on nickel were studied by X-ray diffraction, A E S, M E B and energy dispersive X-ray analyses.
E. Chassagneux, G. Thomas
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Hot Corrosion of Gas Turbine Components

Journal of Engineering for Power, 1979
Hot corrosion is the accelerated rate of oxidation of coatings and substrates, which occurs when a condensed phase is present on the surface. The major constituent of the corrosive deposit is sodium sulfate, although when fuels other than light distillates are employed, the deposit can contain various amounts of vanadium pentaoxide, an impurity present
V. Patarini, N. S. Bornstein, M. A. DeCrescente   +2 more
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