Fire-Side Corrosion: A Case Study of Failed Tubes of a Fossil Fuel Boiler …

2017/1/15 · For instance, high-temperature corrosion in coal fired boilers is mainly caused as a result of the presence of impurities like sulphur, alkali metals, and chlorine in the coal. During boilers operation, low melting point deposits such as Na 2 O·V 2 O 4 ·11V 2 O 5 ( T m = 535°C) are formed on the surface of superheater and reheater tubes.

Hot Corrosion Studies on Alloy 617 OCC in the Context of Its Use …

2017/2/21 · Coal ash hot corrosion is the result of competition between oxidation and sulfidation which affect the alloys exposed to high temperature combustion gases containing sulfate coal ash []. Alloys based on nickel are expected to be the best candidate materials for A-USC steam boiler applications in coal-fired power plants [ 5 ].

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Erosion-corrosion of plasma as sprayed and laser remelted …

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

(PDF) Corrosion in fire tube boilers of biomass combustion plants …

Corrosion of heat exchangers is strongly related to ash-deposition on the tubes. In hot water fire tube boilers where the flue gas passes inside the tubes no or little direct impaction of sticky

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Erosion Corrosion Study of HVOF Sprayed Thermal Sprayed Coatings on Boiler …

simulated boiler environment at 900 C using HVOF process. The author found that NiCrBSi coating on SF 800H reduce maximum hot corrosion 80%, while NiCrBSi coating on SN 600 and SN 601 steel reduce hot corrosion by 40% and 65% respectively. H.S

Hot Corrosion Studies in Coal Fired Boiler Environment - CORE

Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): .matec-conferences.o

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Hot corrosion behavior of thermal spray coatings on superalloy in coal-fired boiler environment …

D. High temperature hot corrosion studies in coal-fired industrial boiler environment The bare and the three D-gun coated specimens were exposed to the flue gases in the platen super-heater zone of the coal-fired boiler of Stage-II at Guru Nanak Dev selected for

Boiler steel | Article about boiler steel by The Free Dictionary

Hot Corrosion Study of High Velocity Oxy-Fuel (HVOF) Sprayed Coatings on Boiler Tube Steel in Actual Coal Fired Boiler Sidhu, "High temperature hot corrosion behaviour of NiCr and Cr3C2-NiCr coatings on T91 boiler steel in an aggressive environment at 750[degrees]C," Surface and Coatings Technology, vol.

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Hot corrosion studies of HVOF-sprayed Cr3C2-NiCr coating on 310S stainless steel in an actual environment of a coal fired boiler …

Hot corrosion studies of HVOF-sprayed Cr3C2-NiCr coating on 310S stainless steel in an actual environment of a coal fired boiler By V. N. Shukla, R. Jayaganthan and V. K. Tewari Abstract Abstract-The present investigation is an attempt to evaluate the hot

G OURNAL OF ENGINEERING SCIENCE AND RESEARCHES COMPARATIVE HOT CORROSION …

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 boilero

Tube Failures in Coal Fired Boilers | Request PDF

A case study reported by Prakash et. al. [27] pertaining to a coal fired boiler of a power plant where out of 89 failure occurring in one year duration, 50 failures were found to be due to hot

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Investigation on the Behavior of Detonation Gun Sprayed Stellite-6 Coating on T-22 Boiler Steel in Actual Boiler Environment …

2019/6/21 · In present study, ASTM SA213 T-22 boiler tube steel sample was coated with Stellite-6 using Detonation Gun (D-Gun) thermal spraying method. Coated and uncoated samples were kept in the super-heater zone of a coal fired boiler at 900 C up-to 1000 h (Hrs

Hot Corrosion of Superalloys in Boilers for Ultra-Supercritical …

2018/8/1 · 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

Hot corrosion behavior of thermal spray coatings on superalloy in …

2015/2/18 · Erosion-corrosion is a serious problem observed in steam-powered electricity generation plants, and industrial waste incinerators. In the present study, four compositions of Cr3C2-(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). X-ray

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(PDF) Hot Corrosion Studies in Coal Fired Boiler Environment

Combating hot corrosion of boiler tubes – A study - ScienceDirect

Comparative study of corrosion behaviour of HVOF-coated boiler …

2015/9/1 · D. High temperature hot corrosion studies in coal-fired industrial boiler environment The bare and the three D-gun coated specimens were exposed to the flue gases in the platen super-heater zone of the coal-fired boiler of Stage-II at Guru Nanak Dev Thermal Plant, Bathinda, Punjab, India.

Evaluation of hot corrosion behaviour of HVOF sprayed Ni–5Al and NiCrAl coatings in coal fired boiler environment…

2013/7/19 · (2010). Evaluation of hot corrosion behaviour of HVOF sprayed Ni–5Al and NiCrAl coatings in coal fired boiler environment. Surface Engineering: Vol. 26, No. 6, pp. 413-421.

Combating hot corrosion of boiler tubes – A study - ScienceDirect

Combating hot corrosion of boiler tubes – A study - ScienceDirect

High Temperature Behavior of Cr3C2-NiCr Coatings in the Actual …

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.

Studies of the fate of sulfur trioxide in coal-fired utility boilers based on modified selected condensation methods

The formation of sulfur trioxide (SO(3)) in coal-fired utility boilers can have negative effects on boiler performance and operation, such as fouling and corrosion of equipment, efficiency loss in the air preheater (APH), increase in stack opacity, and the formation of PM(2

High Temperature Corrosion - an overview | ScienceDirect Topics

The fire-side corrosion of superheaters and reheaters in coal-fired utility boilers is one of the main problems that have limited main steam temperatures to 540 C for the past 40 years. It exhibits its maximum rate of attack at 700–750 °C, where the corrodent is liquid, and decreases to a minimum at higher temperatures, where the corrodent does not condense.