TY - JOUR

T1 - Surface sulphide formation on high-temperature corrosion resistant alloys in a H2S-HCl-CO2 mixed atmosphere

AU - Nimmervoll, Manuela

AU - Schmid, Alexander

AU - Mori, Gregor Karl

AU - Hönig, Stefan

AU - Haubner, Roland

N1 - Publisher Copyright: © 2021 Elsevier Ltd

PY - 2021/4/1

Y1 - 2021/4/1

N2 - In this paper the corrosion behavior of high temperature corrosion resistant alloys is investigated in a gas atmosphere containing HCl and H 2S at 480 °C and 680 °C. By considering the vapor pressures of the metal chlorides and the water gas shift reaction, as well as the influence of H 2S, the different corrosion behavior at 480 °C compared to 680 °C can be explained and a model of the course of corrosion is proposed. Corrosion tests were performed for 240 h with the austenitic stainless steels S31400 (20 wt% Ni) and N08811 (30.4 wt% Ni) and with the Ni-based alloy N06600 (72.5 wt% Ni). It could be shown that with increasing Ni-content in the alloy, the corrosion rate at high temperatures decreased, but this effect could no longer be observed at lower temperatures. While for N08811 and N06600 the mass loss was lower at 680 °C, it increased at temperatures of 480 °C. In the case of S31400 the mass loss increased with rising temperature.

AB - In this paper the corrosion behavior of high temperature corrosion resistant alloys is investigated in a gas atmosphere containing HCl and H 2S at 480 °C and 680 °C. By considering the vapor pressures of the metal chlorides and the water gas shift reaction, as well as the influence of H 2S, the different corrosion behavior at 480 °C compared to 680 °C can be explained and a model of the course of corrosion is proposed. Corrosion tests were performed for 240 h with the austenitic stainless steels S31400 (20 wt% Ni) and N08811 (30.4 wt% Ni) and with the Ni-based alloy N06600 (72.5 wt% Ni). It could be shown that with increasing Ni-content in the alloy, the corrosion rate at high temperatures decreased, but this effect could no longer be observed at lower temperatures. While for N08811 and N06600 the mass loss was lower at 680 °C, it increased at temperatures of 480 °C. In the case of S31400 the mass loss increased with rising temperature.

UR - http://www.scopus.com/inward/record.url?scp=85099358404&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2021.109241

DO - 10.1016/j.corsci.2021.109241

M3 - Article

VL - 181.2021

JO - Corrosion science

JF - Corrosion science

SN - 0010-938X

IS - 1 April

M1 - 109241

ER -