Laboratory-simulated fuel-ash corrosion of superheater tubes in coal-firedultra-supevcritical-boilers

Citation
P. Castello et al., Laboratory-simulated fuel-ash corrosion of superheater tubes in coal-firedultra-supevcritical-boilers, MATER CORRO, 51(11), 2000, pp. 786-790
Citations number
28
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science & Engineering
Journal title
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
ISSN journal
0947-5117 → ACNP
Volume
51
Issue
11
Year of publication
2000
Pages
786 - 790
Database
ISI
SICI code
0947-5117(200011)51:11<786:LFCOST>2.0.ZU;2-G
Abstract
The corrosion behaviour of a number of Ni-base alloys of different composit ion together with a highly-alloyed austenitic stainless steel has been inve stigated with and without coating of the samples with alkali-containing syn thetic coal ash. The effects of various parameters have been studied, namel y the Cr content (from 20 to 28 mass % Cr), the test temperature (700 and 7 75 degreesC), the SO2 content in the gas (I vol% and 0.25 vol % SO2) and th e alkali sulphate content of the ash (10 and 30 mass%). The results can be explained on the basis of the differences in corrosion mechanisms resulting primarily from the composition of the alloys tested.