TY - GEN
T1 - Materials performance in plant exposures and laboratory simulation of a cement kiln environment
AU - Pettersson, Rachel
AU - Flyg, Jesper
AU - Madina, Virginia
AU - Vangeli, Pascale
PY - 2008
Y1 - 2008
N2 - The performance of high temperature steels, nickel-base overlay welds and carbon steel has been evaluated. Field exposures for 7000 hours at 615°C or 1450 hours at 805°C were conducted in a cement kiln fired principally with coke. The environment had a high ash content, a significant sulphur content, but only low levels of chloride. Laboratory simulation of the environment was carried out at 700°C for 960 hours with application of a 99% CaSO 4-1%KCl deposit every 160 hours. The gaseous atmosphere was N 2-30%CO 2-5%H 2O-1%O 2-0.03%SO 2. The steels investigated were Fe-25Cr-20Ni (UNS S31008, EN 1.4845), Fe-21Cr-11Ni-Si-N-Ce (UNS S30815, EN 1.4835) and Fe-15Cr-10Ni 6Mn-1Mo (UNS S21500, EN 1.4982) These were also compared with overlay weld metals of Ni-21Cr-9Mo-Nb (UNS N06625, EN 2.4856) and Ni-16Cr-16Mo-W (UNS N10276, EN 2.4819). Metal loss was evaluated from metrology and generally gave similar ranking of alloy performance from field and laboratory tests. The corrosion rate could be decreased by 50% to 99% by replacing carbon steel by higher alloyed materials. Detailed metallography has been used to elucidate the corrosion attack and the occurrence of oxidation and sulphidation at the reaction front.
AB - The performance of high temperature steels, nickel-base overlay welds and carbon steel has been evaluated. Field exposures for 7000 hours at 615°C or 1450 hours at 805°C were conducted in a cement kiln fired principally with coke. The environment had a high ash content, a significant sulphur content, but only low levels of chloride. Laboratory simulation of the environment was carried out at 700°C for 960 hours with application of a 99% CaSO 4-1%KCl deposit every 160 hours. The gaseous atmosphere was N 2-30%CO 2-5%H 2O-1%O 2-0.03%SO 2. The steels investigated were Fe-25Cr-20Ni (UNS S31008, EN 1.4845), Fe-21Cr-11Ni-Si-N-Ce (UNS S30815, EN 1.4835) and Fe-15Cr-10Ni 6Mn-1Mo (UNS S21500, EN 1.4982) These were also compared with overlay weld metals of Ni-21Cr-9Mo-Nb (UNS N06625, EN 2.4856) and Ni-16Cr-16Mo-W (UNS N10276, EN 2.4819). Metal loss was evaluated from metrology and generally gave similar ranking of alloy performance from field and laboratory tests. The corrosion rate could be decreased by 50% to 99% by replacing carbon steel by higher alloyed materials. Detailed metallography has been used to elucidate the corrosion attack and the occurrence of oxidation and sulphidation at the reaction front.
UR - http://www.scopus.com/inward/record.url?scp=84864988190&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84864988190
SN - 9781615674251
T3 - 17th International Corrosion Congress 2008: Corrosion Control in the Service of Society
SP - 2148
EP - 2158
BT - 17th International Corrosion Congress 2008
T2 - 17th International Corrosion Congress 2008: Corrosion Control in the Service of Society
Y2 - 6 October 2008 through 10 October 2008
ER -