Accelerated corrosion of five commercial steels under a ZnCl2–KCl deposit in a reducing environment typical of waste gasification at 673–773K

Improving Heat Recovery In Biomass-Fired Boilers

“…Spiegel [88] showed that, if HCl is present in the flue gases, temperatures above about Pan, Zeng and Niu [92] later studied the corrosion of 9% and 11% Cr steels and UNS S30400 (Type 304) stainless steel under ZnCl 2 -KCl deposits at 400-500°C (752-932°C) in a reducing CO 2 -2%H 2 -0.5%HCl gas mixture. This work and a subsequent study [93] confirmed that alloys containing more chromium showed greater corrosion resistance in reducing environments. However, even UNS S30400 (Type 304) had unacceptable corrosion resistance under a ZnCl 2 -KCl deposit at temperatures between 400 and 500°C (752 and 932°F), and showed active oxidation.…”

High Temperature Corrosion of Inconel 600 in NaCl-KCl Molten Salts

“…However, on the other hand it has also been suggested that the NiCr-based alloys show better performance than Fe-base alloys. This combined effect has been established in other studies [9][10][11][12][13][14]. This work addresses the corrosion resistance of Inconel 600 in NaCl-KCl mixture (1 : 1 M) at 700, 800, and 900 ∘ C for 100 hours in static air.…”

“…At 900 ∘ C, in the first 4 hours of testing there is an abrupt increase in corr values (from 2.2 to 7.6 mA/cm 2 ) and subsequently a slight increase until 56 hours (11.6 mA/cm 2 ) and then they decrease towards the end of the test. This indicates a strong initial attack of the material where the molten salts dissolved the passive layer [10].…”

Effects of Different Fuel Specifications and Operation Conditions on the Performance of Coated and Uncoated Superheater Tubes in Two Different Biomass-Fired Boilers

“…2 The KCl-induced high temperature corrosion and related corrosion mechanisms have been extensively investigated in the literature. [2][3][4][5][6][7][8][9][10][11][12][13][14][15] Some studies argue that the corrosion attack initiates with the penetration of Cl species through the oxide scale and results in the formation of metal chlorides. The volatile metal chlorides then diffuse outward and react with O2 to form metal oxide.…”