Oxidation of boiler steels - RWTH Aachen University
Oxidation of boiler steels - RWTH Aachen University
Oxidation of boiler steels - RWTH Aachen University
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7 th GTT-Workshop, May 2005 <strong>Oxidation</strong> <strong>of</strong> <strong>boiler</strong> <strong>steels</strong><br />
k p [mg 2 cm -4 h -1 ]<br />
Influence <strong>of</strong> alloy grain size on the oxide scale growth<br />
0,48<br />
0,40<br />
0,32<br />
0,24<br />
0,16<br />
0,08<br />
0,00<br />
⎛ ∆m<br />
⎞<br />
⎜ ⎟<br />
⎝ A ⎠<br />
UNIVERSITÄT<br />
SIEGEN<br />
2<br />
=<br />
0 10 20 30 40 50 60 70 80 90 100 110<br />
k<br />
p<br />
t<br />
alloy grain size [µm]<br />
0,55 Gew.% Cr<br />
1,43 Gew.% Cr<br />
2,25 Gew.% Cr<br />
thickness [µm]<br />
25<br />
20<br />
15<br />
10<br />
5<br />
outer scale<br />
inner scale<br />
0<br />
0 20 40 60 80 100<br />
(Trindade et al. ; Mater. Corr., Part I, 2005)<br />
SEM<br />
1,43 Gew.%Cr<br />
alloy grain size [µm]<br />
Institut für Werkst<strong>of</strong>ftechnik<br />
Lehrstuhl für Materialkunde und Werkst<strong>of</strong>fprüfung
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