Hot Corrosion Studies in Coal Fired Boiler Environment - CORE

Abstract. Hot corrosion behaviour of the bare and D-gun coated superfer 800H exposed to low temperature super-heater zone of the coal fired boiler of Guru Nanak Dev Thermal Power Plant, Bathinda, Punjab, India. The specimens were hanged in the platen super-heater of coal fired boiler where the gas temperature was around 900 oC 10 oC.

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(PDF) Combating hot corrosion of boiler tubes – A study

The premature failure of boiler tubes, especially in coal fired boilers poses serious threat to the efficiency of the Indian boilers. In coal fired thermal power plant boilers, hot corrosion and

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Hot Corrosion of Superalloys in Boilers for Ultra

Aug 01, 2018 · However, it is important to note that the operating conditions within a coal-fired boiler are very different in terms of the service environment. Hot corrosion as it occurs in coal-fired boilers is a complex topic since it is a consequence of the combined effect of combustion gas atmosphere, fly ash deposits, and the alloy itself.

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Present scenario of hot corrosion studies performed with

May 13, 2021 · "Hot corrosion study of high velocity oxy-fuel (HVOF) sprayed coatings on boiler tube steel in actual coal fired boiler." Pakistan Journal of Scientific & Industrial Research Series A: Physical Sciences 61(3) (2018), pp. 149– 155. Google Scholar; 10. Alia, F. F., et al.

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Combating hot corrosion of boiler tubes – A study

Dec 01, 2018 · In coal fired thermal power plant boilers, hot corrosion and erosion is the primary reason behind downtime, which leads to huge economic losses. So the consolidated results of the various researchers working in the area of combating hot corrosion of boiler tubes, especially in context with Indian boilers (both actual and simulated environment) are presented in this article.

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Current Status of Prevention of Hot Corrosion of Boiler

[36] A. Mangla, V. Chawla, and G. Singh, "Comparative hot Corrosion behavior of HVOF and Plasma Sprayed Ni-20Cr Coated T-22 Steel in Actual Coal Field Boiler Environment", Journals of Engineering Science and Researches, ISSN 2348-8034, 2017.

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7 WAYS TO PREVENT CORROSION IN BOILER | by Thermodyne

Jan 06, 2016 · 1. Eliminating corrosive gases 2. Removal of dissolved oxygen 3. High PH value of boiler water 4. Mechanical deaeration of boiler water 5. Higher feed water temperature i.e. reduces its oxygen…

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(PDF) COMPARATIVE HOT CORROSION BEHAVIOR OF HVOF …

The mounted samples were gold coated in order to have conductivity and then subjected to SEM/EDAX analysis for X-Ray mapping analysis. Corrosion studies in Actual Coal Fires Boiler environmentThe actual environment study was performed upto 10 cycles (100 hrs heating and 1 hr cooling) at Guru Nanak Dev Thermal Power Plant, Bathinda, Punjab, India.

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Hot Corrosion Behaviour of Detonation Gun Sprayed Stellite

May 06, 2014 · Hot corrosion is the serious problem in gas turbines, superheaters, and economizers of coal-fired boilers. It occurs due to the usage of wide range of fuels such as coal, oil, and so on at the elevated temperatures. Protective coatings on boiler steels are used under such environments. In the present investigation, Stellite-6 and Stellite-21 coatings have been deposited on boiler steel SAE 431

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Hot corrosion behavior of thermal spray coatings on

Combating hot corrosion of boiler tubes – A study - ScienceDirect

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Erosion Corrosion Study of HVOF Sprayed Thermal Sprayed

In Indian coal fired boiler low grade coal is used as a fuel, which contains sulphur contents [3]. During combustion it produces SO at extreme temperature in boiler environment. The NiCrBSi, and Stellite-6 coating were found to be less useful gain during hot corrosion studies in Na 2 SO 4–60%V 2 O 5

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High-temperature corrosion problems in steam boilers

Abstract. There are essentially three distinct high temperature corrosion problems in fossil fuel fired steam boilers. These are: (1) corrosion of the superheaters and reheaters due to the deposition of fuel impurities, principally alkali metal sulfates in the case of coal-fired boilers and vanadium pentoxide in the case of oil-fired units.

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ISSN: 2277-9655 et al., IC™ Value: 3.00 CODEN: IJESS7 IJESRT

In coal fired boilers hot corrosion is the main problems that occurs at 700 to 750°C, where the corrodents are in liquid form. It is induced by a thin Hot corrosion study in molten salt environment The polished specimens were exposed to accelerated hot corrosion. A coating of Na 2 SO 4-60%V 2 O 5

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Hot corrosion studies on alloy 617 OCC in the context of

even higher [2]. The superheater and reheater materials in the coal -fired boiler environment always suffer coal ash hot corrosion at elevated temperatures [3, 4]. Alloy 617 with an optimized chemical composition (617 OCC) has been identified as one of the promisin g m aterials in this perspective, where chromium is very high for enhancing its

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Combating hot corrosion of boiler tubes – A study

Combating hot corrosion of boiler tubes – A study - ScienceDirect

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Investigation on Hot Corrosion Behavior of Plasma Spray

spraying (HVOF) sprayed NiCrBSi coatings to be effective in imparting hot corrosion resistance to Supernickel-75 in a coal fired boiler environment. The formation of oxides of chromium and cobalt, and spinels of cobalt–chromium (CoCr 2O4 and nickel–chromium (NiCr 2O4) for the alloy might be responsible for best

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Corrosion in coal-fired boilers (Technical Report) | OSTI.GOV

Corrosion in coal-fired boilers. Conference Vausher, A L. The corrosive effect of the flue gas and the fly ash from burning coal on combustion and pollution control equipment has led to extensive research efforts aimed at solving this problem. A wide variety of chemical additives are offered by suppliers to perform corrosion reduction functions

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The Role of Fireside Corrosion on Boiler Tube Failures, Part I

Apr 01, 2010 · P.D. Miller, C.J. Slunder, H.H. Krause, and F.W. Fink, State-of-the-Art Report on Control of Corrosion and Deposits in Stationary Boilers Burning Residual Fuel Oil, Battelle Memorial Institute for

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Hot corrosion behavior of thermal spray coatings on

Abstract. The premature failure of boiler tubes, especially in coal fired boilers poses serious threat to the efficiency of the Indian boilers. In coal fired thermal power plant boilers, hot corrosion and erosion is the primary reason behind downtime, which leads to huge economic losses. So the consolidated results of the various researchers working in the area of combating hot corrosion of boiler tubes, especially in …

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Erosion, Corrosion and Deposition Resistant Coatings for

May 11, 2015 · In power plant boilers, hot ash particles impinge on the tubes, causing erosion, simultaneously the salts present in the boiler environment also cause high-temperature corrosion. Even the ash and slag build up on the tube surfaces as insulating complex oxides, which affect the heat transfer efficiency.

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Comparative Study on Corrosion Behavior of SA213T22 and

hot-corrosion at elevated temperatures is the development of a porous non-protective oxide scale and sulphide precipitates in the substrate [3]. In coal fired boilers and power generating plants, corrosion at elevated temperature is recognized as the main cause of down time. So, the behavior of materials at

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Superheater Corrosion In Biomass Boilers: Today's Science

Dec 01, 2011 · The Niles boiler burns high sulfur coal (3% to 3.5%) that has a reasonably high alkali content, thus the constituents necessary for coal ash corrosion are present in the ash. The test sections were controlled to operate with an average surface metal temperature from approximately 1060 F to 1210 F which was well within the temperature range over

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Erosion Corrosion Behavior of Steels Grades (GradeA1, T11

erosion–corrosion behaviour steels (GradeA, T11, T22) in the real service environment of the coal-fired boiler of a thermal power plant. The cyclic experimental study has performed for 1000 h in the super heater zone of the coal-fired boiler where the temperature was around 900 C. Fly

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Investigation on Hot Corrosion Behavior of Plasma Spray

spraying (HVOF) sprayed NiCrBSi coatings to be effective in imparting hot corrosion resistance to Supernickel-75 in a coal fired boiler environment. The formation of oxides of chromium and cobalt, and spinels of cobalt–chromium (CoCr 2O4 and nickel–chromium (NiCr 2O4) for the alloy might be responsible for best

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Hot Corrosion Studies in Coal Fired Boiler Environment - CORE

Oct 05, 2006 · Hot corrosion studies of HVOF NiCrBSi and Stellite-6 coatings on a Ni-based superalloy in an actual industrial environment of a coal fired boiler 1. Introduction. Coal is an attractive fuel owing to its low price linked to its worldwide availability and due to the 2. Experimental design.

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High Temperature Behavior of Cr 3 C 2 -NiCr Coatings in

Erosion-corrosion is a serious problem observed in steam-powered electricity generation plants, and industrial waste incinerators. In the present study, four compositions of Cr 3 C 2 -(Ni-20Cr) alloy coating powder were deposited by high-velocity oxy-fuel spray technique on T-91 boiler tube steel. The cyclic studies were performed in a coal-fired boiler at 1123 K ± 10 K (850 °C ± 10 °C).

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high temperature corrosion in boilers

Application of High Temperature Corrosion-Resistant Materials … 2009/9/23 · High temperature corrosion in boiler firing coal is mainly caused due to the presence of impurities like sulphur, alkali metals and chlorine. In fuel oil fired boilers the main impurities are vanadium, sulphur, sodium and chlorine.

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Characterization and hot corrosion behavior of D-gun

Sep 04, 2017 · Hot corrosion is the major degradation mechanism of failure of boiler and gas turbine components. The present work aims to investigate the hot corrosion resistance of detonation gun sprayed (D-gun) Cr2O3-75 per cent Al2O3 ceramic coating on ASTM-SA210-A1 boiler steel.,The coating exhibits nearly uniform, adherent and dense microstructure with porosity less than 0.8 per cent.

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A Review Paper on Erosion and Corrosion Behavior of Coal

Fig. 1: Corrosion of Bed Coil of Boiler Introduction atmospheric fluidized bed combustion (afbc) boiler Atmospheric fluidized-bed combustion (AFBC) boilers offer efficient, cost effective and reliable steam generation. AFBC technology promises to provide a viable alternative to conventional coal-fired and other solid fuel-fired boilers.

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G OURNAL OF ENGINEERING SCIENCE AND RESEARCHES …

3. Corrosion studies in Actual Coal Fires Boiler environment The actual environment study was performed upto 10 cycles (100 hrs heating and 1 hr cooling) at Guru Nanak Dev Thermal Power Plant, Bathinda, Punjab, India. The specimens were hung in the boiler with the help of Kanthal wire. The temperature of the hanging zone was around 700oC. All

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