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waterwall corrosion

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430147
EISBN: 978-1-62708-253-2
...) Chelate corrosion Fire-side corrosion: Waterwall corrosion or reduced atmosphere corrosion Fuel ash corrosion Coal-ash corrosion Oil-ash corrosion Hot corrosion Acid dew point corrosion or cold-end corrosion SCC Polythionic acid stress-corrosion cracking (PASCC) Fire...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430290
EISBN: 978-1-62708-253-2
... such as waterwall, fuel ash, and hot corrosion, acid dew-point or cold-end corrosion, and polythionic acid corrosion. It also addresses stress corrosion cracking and includes relevant case studies. acid dew point corrosion boiler tubes fire-side corrosion fuel ash corrosion hot corrosion polythionic acid...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080335
EISBN: 978-1-62708-304-1
... and alloys. It also discusses corrosion protection methods for furnace waterwalls and superheater tubes in waste-to-energy boilers. corrosion corrosion protection superheaters waste incinerators waste-to-energy boilers 12.1 Introduction Municipal solid waste (MSW) is a combination...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080259
EISBN: 978-1-62708-304-1
..., intended to reduce NOx emissions, accelerates tube wall wastage. It also covers circumferential cracking in furnace waterwalls, thermal fatigue cracking induced by waterlances and water cannons, superheater-reheater corrosion, and erosion in fluidized-bed boilers. coal-fired boilers combustion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080321
EISBN: 978-1-62708-304-1
.... It explains how oil-ash corrosion affects waterwalls, superheaters, and reheaters as well as metal tube supports and hangers. fireside corrosion oil-ash corrosion oil-fired boilers refinery furnaces waterwall corrosion 11.1 Introduction Fuel oils primarily consist of residues from...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080437
EISBN: 978-1-62708-304-1
... tensile and rupture strengths as well as ductility, thus resulting in rupture of the steel component during service. There are two sources of hydrogen that contribute to hydrogen attack of steels in industries. One source of hydrogen is from the corrosion of steel by boiler water in the waterwall tube...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430204
EISBN: 978-1-62708-253-2
... corrosion, caustic gouging, and pitting External corrosion or fire-side corrosion: For example, waterwall fireside corrosion, superheater/reheater fireside corrosion, and acid dew point corrosion The process of oxidation of iron is known as rusting or corrosion . The interaction of steam...
Image
Published: 01 November 2007
Fig. 12.22 Pitting attack is the common mode of corrosion of alloy 625 weld overlay on the waterwall. Shown in the photograph are three tubes and three membranes. More
Image
Published: 01 November 2007
Fig. 10.39 Scanning electron micrograph (a) showing a very early stage of the circumferential grooving formed in alloy 625 overlay on a waterwall tube in the same supercritical boiler, as shown in Fig. 10.38 . EDX spectra (b) and (c) show the alloying elements associated with the ″light More
Image
Published: 01 November 2007
Fig. 10.29 Optical micrograph showing the transverse cross section of Type 312 overlay on the waterwall in a supercritical unit after about 6.5 years of service, revealing essentially no corrosion and no cracking More
Image
Published: 01 November 2007
Fig. 10.52 Optical micrograph showing typical longitudinal cross section at the crown bead of the 312 waterwall overlay after about 6.5 years of service in a supercritical unit. The corrosion scales were chromium-rich oxides as identified by SEM/EDX analysis. Courtesy of Welding Services Inc. More
Image
Published: 01 November 2007
Fig. 17.2 Low-magnification optical micrograph showing numerous microcracks and microfissures formed in the carbon steel (ASME SA192) of the waterwall tube that suffered hydrogen attack in a subcritical coal-fired boiler. Note numerous microcracks and microfissures. Also shown are heavy More
Image
Published: 01 November 2007
Fig. 10.55 Optical micrograph showing a very thin oxide scale on the surface of the 309 overlay on a waterwall tube (T11) after 7 years of service subjected to steam sootblowing in a supercritical boiler, revealing no evidence of erosion/corrosion damage or cracking. The 309 overlay More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080003
EISBN: 978-1-62708-304-1
... a corrosion-resistant weld overlay instead of replacing it with a new construction. This approach has been adopted in the boiler industry in recent years to address the severe corrosion problems with the waterwalls of boilers in waste-to-energy boilers, coal-fired boilers, basic oxygen furnace hoods in steel...
Image
Published: 01 November 2007
Fig. 10.41 Scanning electron micrograph (backscattered electron image) showing the corrosion products in a circumferential groove formed in Type 309 overlay on the waterwall of a supercritical boiler after 10 years of service. The results of the semiquantative EDX analysis of the corrosion More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080359
EISBN: 978-1-62708-304-1
....” 13.3.4 Waterwalls above “Cut Line” The waterwalls above the butt weld joints with composite tubes typically are bare carbon steel. Corrosion of these waterwall carbon steel tubes is primarily caused by sulfidation by reduced sulfur gases, primarily H 2 S. The corrosion rate is typically 0.2 mm/yr (8...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.9781627083041
EISBN: 978-1-62708-304-1
Image
Published: 01 November 2007
Fig. 10.33 Scanning electron micrograph (backscattered electron image) showing one of the circumferential grooves formed on a T22 waterwall tube (2.25Cr-1Mo) as shown in Fig. 10.32 . Semiquantative energy dispersive x-ray spectroscopy (EDX) analysis in terms of weight percent at different More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080379
EISBN: 978-1-62708-304-1
...., circumferential cracking of the waterwall) is covered in Chapter 10 “Coal-Fired Boilers.” In that chapter, the correlation between the circumferential cracking and the stress-assisted preferential corrosion penetration is discussed. The current chapter discusses the phenomenon of the preferential high...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080001
EISBN: 978-1-62708-304-1
... Abstract This chapter outlines the topics covered in the book and explains why and to whom the book was written. The book is intended for engineers, metallurgists, and failure analysts who work with materials and components that operate in high-temperature corrosive environments. It covers...