2024-03-30T07:25:31Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1679552020-04-15T12:40:24Zcom_10261_35com_10261_5col_10261_288
00925njm 22002777a 4500
dc
Mayoral Gastón, María del Carmen
author
Izquierdo Pantoja, María Teresa
author
Andrés Gimeno, José Manuel
author
Rubio Villa, Begoña
author
2002-10-08
The sulfidation effect of molten iron sulfides was studied on oxidized austenitic
steels as a simulation of furnace-wall corrosion in PC combustion enûironments.
The test coupons were oxidized to produce an external oxide scale and
pyrite was placed on the oxide and thermally treated in an inert atmosphere
to decompose the pyrite into pyrrhotite. DSC-TGA and XRD indicated that
FeS interacts with the Fe2O3 oxide layer, eûen at 700°C if the contact is good,
changing the oxidation state of iron and the physical structure. On the other
hand, the interaction of FeS with Cr2O3 between 1100 to 800°C, 24 hr in the
inert atmosphere, consisted of the formation of a chromium sulfide layer
beneath the oxide scale. SEM-EDX showed that the diffusion of sulfur in the
steel matrix can be 30 μm deep, indicated by small particles of chromium
sulfide. It is demonstrated that iron sulfide deposits could be responsible for
sulfidation of the alloys.
Oxidation of Metals 59(3/4): 395-407 (2003)
0030-770X
http://hdl.handle.net/10261/167955
10.1023/A:1023052313584
Fireside corrosion
Sulfidation
Iron sulfide
Impact of iron-sulfide deposits on oxidized austenitic steels as simulation of corrosion and fireside-tube wastage in coal combustion