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hot corrosion

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001681
EISBN: 978-1-62708-234-1
... Abstract A microstructural analysis has been made of a burner nozzle removed from service in a coal gasification plant. The nozzle was a casting of a Co-29wt%Cr-19wt%Fe alloy. Extensive hot corrosion had occurred on the surface. There was penetration along grain boundaries, and corrosion...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001281
EISBN: 978-1-62708-215-0
... analysis determined that the deterioration was the result of hot corrosion caused by a combination of contaminants, cooling-hole blockage, and coating loss. Selected References Selected References • Benac D.J. and Swaminathan V.P. , Elevated-Temperature Life Assessment for Turbine...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001109
EISBN: 978-1-62708-214-3
... 0.01 2.19 2.55 Atomic 2.49 38.86 0.10 50.96 0.66 0.01 3.25 3.65 Fig. 3 Micrographs of grate bar that suffered hot corrosion. (a) Unetched, showing external oxide scale and internal sulfide particles (light gray area). (b) Etched, showing external oxide scale along...
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Published: 01 June 2019
Fig. 11 Degradation of rupture for Udimet 500 due to hot corrosion at 705 °C More
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Published: 01 June 2019
Fig. 2 Degradation of rupture for Udimet 500 due to hot corrosion at 705 °C (1300 °F) More
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Published: 01 December 1992
Fig. 3 Micrographs of grate bar that suffered hot corrosion. (a) Unetched, showing external oxide scale and internal sulfide particles (light gray area). (b) Etched, showing external oxide scale along with precipitated carbides (dark gray area)and lamellar structure consisting of austenite More
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Published: 01 December 1992
Fig. 6 Results of laboratory hot corrosion (cyclic) tests on HH steel coupons for 100h. (a) and (b) Coupons corroded undersulfate and sulfate-chloride loading, respectively (c) and (d) Corrosion morphology undersulfate and sulfate-chloride loading, respectively. More
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Published: 01 December 2019
Fig. 4 Macrograph showing the hot corrosion cavities found on the SS of the bucket More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001827
EISBN: 978-1-62708-241-9
... Fig. 1 Schematic of the gas turbine [ 13 ] Fig. 2 Regimes of high-temperature attack; temperatures are approximate [ 1 ] Fig. 3 Macrograph showing the bucket from the first stage in as-received condition Fig. 4 Macrograph showing the hot corrosion cavities found...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001701
EISBN: 978-1-62708-219-8
... Biological corrosion A closed-loop hot water heating system at a museum in South Carolina was the subject of this failure evaluation. The system consisted of plain carbon steel pipes (Schedule 40) made of ASTM A 106 or A 53 (ERW or Seamless). The supply and return lines were made of the same materials...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001602
EISBN: 978-1-62708-229-7
... Abstract This article presents a failure analysis of 37.5 mW gas turbine third stage buckets made of Udimet 500 superalloy. The buckets experienced repetitive integral tip shroud fractures assisted by a low temperature (type II) hot corrosion. A detailed analysis was carried out on elements...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0046969
EISBN: 978-1-62708-227-3
..., 2.7x micrographic examination on sections etched with ferric chloride and hydrochloric acid in methanol) supported the conclusions that the blades failed by hot-corrosion attack. Variation in rate of attack on coated blades was attributed to variation in integrity of the aluminide coating, which had...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... and metal dusting, sulfidation, hot corrosion, chloridation, hydrogen interactions, molten metals, molten salts, and aging reactions including sensitization, stress-corrosion cracking, and corrosion fatigue. It concludes with a discussion on various protective coatings, such as aluminide coatings, overlay...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... oxidation, carburization, metal dusting, nitridation, carbonitridation, sulfidation, and chloridation. Several other potential degradation processes, namely hot corrosion, hydrogen interactions, molten salts, aging, molten sand, erosion-corrosion, and environmental cracking, are discussed under boiler tube...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006824
EISBN: 978-1-62708-329-4
... used in the laboratory portion of the failure investigation are mentioned in the failure examples. The topics covered are creep, localized overheating, thermal-mechanical fatigue, high-cycle fatigue, fretting wear, erosive wear, high-temperature oxidation, hot corrosion, liquid metal embrittlement...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001657
EISBN: 978-1-62708-227-3
... that coating erosion in conjunction with severe hot-corrosion was responsible for crack initiation in the leading edge area. Coating erosion Marine engines Turbine blades Turbine vanes MAR-M302 Inconel 713C High-temperature corrosion and oxidation Fatigue fracture Introduction...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0047606
EISBN: 978-1-62708-228-0
..., the substitution of a more corrosion-resistant alloy, such as Incoloy 800 or 825, may be necessary. Activation Butt welds Pipes Residual stress Weld metal 316L UNS S31603 Stress-corrosion cracking Pitting corrosion Joining-related failures Type 316L stainless steel pipes carrying brine at 120...
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Published: 01 June 2019
Fig. 1 Uncoated and aluminide-coated IN-713 turbine blades that failed by hot corrosion in a marine environment. (a) An uncoated blade showing splitting along the leading edge and swelling on the surface of the airfoil. 2.7x. (b) Section taken through the leading edge of an uncoated blade More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091761
EISBN: 978-1-62708-229-7
... in a bucket tip shroud and its principal stresses Discussion The differing microstructure of the airfoil results in changes in mechanical properties. Type 2 hot corrosion was present at these third-stage buckets, which operate at approximately 650 °C (1200 °F). Other contributing factors were...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003551
EISBN: 978-1-62708-180-1
.... In gas corrosion, the driving force is the pressure gradient. Gas penetration is less rapid, in terms of mass, than that of wetting liquids; reactions do not necessarily commence at the hot face. However, the depth of penetration of gases can be much greater than that of liquids. Moving down...