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Peculiar high temperature corrosion of martensite alloy under impact of Estonian oil shale fly ash

Abstract

The superheaters` surfaces of oil shale steam boiler made of pearlitic and austenitic alloys, are subject to intensive corrosion, mainly due to presence of chlorine in external deposits. The applicability of martensitic alloys X1OCrMoVNb91 and X20CrMoV121 for superheaters is examined here and empirical equations allowing to predict alloys` corrosion resistance in the range of operational temperatures are established. Alloy X1OCrMoVNb91 is found been most perspective for superheaters of boilers firing fossil fuel that contain alkaline metals and chlorine. The abnormal dependence of corrosion resistance of martensitic alloys on temperature is revealed, namely, corrosion at 580 deg C in presence of oil shale fly ash is more intensive than at 620 deg C. (orig.) 2 refs.
Authors:
Tallermo, H; Klevtsov, I [1] 
  1. Thermal Engineering Department of Tallinn Technical University, Tallinn (Estonia)
Publication Date:
Dec 31, 1998
Product Type:
Conference
Report Number:
VTT-SYMP-184(v.1); CONF-980999-
Reference Number:
SCA: 360105; 200104; PA: FI-99:003061; EDB-99:036365; SN: 99002064675
Resource Relation:
Conference: 4. Baltica seminar on plant maintenance for managing life and performance, Helsinki (Finland), 7-9 Sep 1998; Other Information: PBD: 1998; Related Information: Is Part Of BALTICA IV. Plant maintenance for managing life and performance; Hietanen, S.; Auerkari, P. [eds.] [VTT Manufacturing Technology, Espoo (Finland). Operational Reliability]; PB: 332 p.
Subject:
36 MATERIALS SCIENCE; 20 FOSSIL-FUELED POWER PLANTS; FOSSIL-FUEL POWER PLANTS; BOILERS; OIL SHALES; ASHES; CORROSION RESISTANCE; ESTONIA; CHROMIUM-MOLYBDENUM STEELS; VANADIUM ADDITIONS; NIOBIUM ADDITIONS; SUPERHEATERS; TEMPERATURE RANGE 0400-1000 K
OSTI ID:
324969
Research Organizations:
Technical Research Centre of Finland, Espoo (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE99730862; ISBN 951-38-4577-X; TRN: FI9903061
Availability:
OSTI as DE99730862
Submitting Site:
FI
Size:
pp. 295-303
Announcement Date:

Citation Formats

Tallermo, H, and Klevtsov, I. Peculiar high temperature corrosion of martensite alloy under impact of Estonian oil shale fly ash. Finland: N. p., 1998. Web.
Tallermo, H, & Klevtsov, I. Peculiar high temperature corrosion of martensite alloy under impact of Estonian oil shale fly ash. Finland.
Tallermo, H, and Klevtsov, I. 1998. "Peculiar high temperature corrosion of martensite alloy under impact of Estonian oil shale fly ash." Finland.
@misc{etde_324969,
title = {Peculiar high temperature corrosion of martensite alloy under impact of Estonian oil shale fly ash}
author = {Tallermo, H, and Klevtsov, I}
abstractNote = {The superheaters` surfaces of oil shale steam boiler made of pearlitic and austenitic alloys, are subject to intensive corrosion, mainly due to presence of chlorine in external deposits. The applicability of martensitic alloys X1OCrMoVNb91 and X20CrMoV121 for superheaters is examined here and empirical equations allowing to predict alloys` corrosion resistance in the range of operational temperatures are established. Alloy X1OCrMoVNb91 is found been most perspective for superheaters of boilers firing fossil fuel that contain alkaline metals and chlorine. The abnormal dependence of corrosion resistance of martensitic alloys on temperature is revealed, namely, corrosion at 580 deg C in presence of oil shale fly ash is more intensive than at 620 deg C. (orig.) 2 refs.}
place = {Finland}
year = {1998}
month = {Dec}
}