Materials and Coatings for Superheater Tubes in Biomass- and Waste-fired Boilers

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Search: (id:"swepub:oai:DiVA.org:uu-329114") > Materials and Coati...

1 of 1
Previous record
Next record
To hitlist

Details
MARC

Ssenteza, Vicent,1992Chalmers tekniska högskola,Chalmers University of Technology (author)

Materials and Coatings for Superheater Tubes in Biomass- and Waste-fired Boilers

BookEnglish2023

Publisher, publication year, extent ...

Gothenburg,2023
electronicrdacarrier

Numbers

LIBRIS-ID:oai:research.chalmers.se:7e76a47a-8403-44cc-b08a-f1f1012ab3ef
https://research.chalmers.se/publication/540067URI

Supplementary language notes

Language:English
Summary in:English

Part of subdatabase

SwePubSwePub

Classification

Subject category:lic swepub-publicationtype
Subject category:vet swepub-contenttype

Notes

Combustion of biomass and waste fuels has strong potential as an alternative renewable energy source for meeting the increasing global energy demand, while reducing the net release of CO2 into the atmosphere. The combustion of biomass and waste releases flue gases that contain high amount of alkali salts and water vapour, which drive the corrosion of metallic boiler components. Corrosion issues can lead to reduced material life-time, costly boiler system failures, and eventually reduced electricity efficiency. The focus of corrosion research in these environments has primarily been on the initiation of corrosion and short-term exposures. However, to combat corrosion, it is important to gain an in-depth understanding of the corrosion behaviour of the material during long-term exposure. For this work, a novel experimental set-up that mimics the corrosive nature of the boiler environment was developed, to investigate the long-term corrosion behaviours of materials and coatings. Several relevant chromia- and alumina-forming alloys were exposed as bulk materials and as overlay weld coatings in a KCl(s)/KCl(g)-rich environment at 600°C. The corrosion behaviours were investigated using advanced ion and electron microscopy, together with thermodynamic equilibrium calculations and kinetic simulations. The results show that all alloys experience breakaway oxidation and transition into a secondary corrosion regime, i.e., forming double-layered oxide scales (outward- and inward-growing scales). Within the secondary corrosion regime, alloys may form either fast-growing and less-protective scales (poor secondary protection) or slow-growing and more-protective scales (good secondary protection), depending on the oxide microstructure formed after the breakaway process. The oxide microstructure is influenced by the content of alloying elements, as well as by the microstructure of the alloy. Bulk materials exhibit better corrosion resistance than the overlay weld coatings of similar composition, due to faster formation of the protective secondary scale. The results also indicate that the high-alloy steels experience phase transformation in the inward-growing scales from a less-protective spinel oxide to a more-protective corundum-type oxide, which leads to better corrosion resistance during long exposures

Subject headings and genre

NATURVETENSKAP Kemi Oorganisk kemi hsv//swe
NATURAL SCIENCES Chemical Sciences Inorganic Chemistry hsv//eng
NATURVETENSKAP Kemi Materialkemi hsv//swe
NATURAL SCIENCES Chemical Sciences Materials Chemistry hsv//eng
TEKNIK OCH TEKNOLOGIER Kemiteknik Korrosionsteknik hsv//swe
ENGINEERING AND TECHNOLOGY Chemical Engineering Corrosion Engineering hsv//eng
Secondary Protection
Waste
Boiler
High-Temperature Corrosion
Phase transformation
Biomass
Breakaway Oxidation

Added entries (persons, corporate bodies, meetings, titles ...)

Chalmers tekniska högskola (creator_code:org_t)

Internet link

Find in a library

Materials and Coatings for Superheater Tubes in Biomass- and Waste-fired Boilers... (Search the publication in LIBRIS)

To the university's database

1 of 1
Previous record
Next record
To hitlist

Find more in SwePub

By the author/editor: Ssenteza, Vicent ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Inorganic Chemis ...

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Materials Chemis ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...; and Corrosion Engine ...

By the university: Chalmers University of Technology

Search outside SwePub

Extend your search to:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se