Corrosion of TP347H FG stainless steel in a biomass fired PF utility boiler

Detailed microscopic examinations have been conducted on two, temperature-regulated probes which had been exposed to biomass flue gas inside a PF boiler for 3770 h at 600° and 650°C respectively. The two probes were made from commercial grade heat exchanger alloy (TP 347H FG). A significant buildup...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials science 2001-02, Vol.36 (4), p.1015-1026
Main Authors: LIU, C, LITTLE, J. A, HENDERSON, P. J, LJUNG, Per
Format: Article
Language:English
Subjects:
Applied sciences
Biomass
Corrosion
Corrosion effects
Corrosion environments
Corrosion resistance
Corrosion resistant steels
Exact sciences and technology
Flue gas
Heat exchangers
Hot corrosion
Intergranular corrosion
Materials science
Metals. Metallurgy
Potassium chloride
Scale formation
Stainless steels
Uniform attack (corrosion)
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Detailed microscopic examinations have been conducted on two, temperature-regulated probes which had been exposed to biomass flue gas inside a PF boiler for 3770 h at 600° and 650°C respectively. The two probes were made from commercial grade heat exchanger alloy (TP 347H FG). A significant buildup of potassium chloride and sulphate was found on both probes within the deposits that sinter more strongly on the 650°C probe. Both probes suffer extensive intergranular corrosion as well as general corrosion. The higher temperature enhances scale formation which may provide a beneficial effect with respect to hot corrosion resistance. The intergranular corrosion is linked to the presence of sulphur. The overall material wastage is almost the same for both probes and for different locations covered by deposit.
ISSN:0022-2461
1573-4803
DOI:10.1023/A:1004844411744