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

Nimmervoll, Manuela; Schmid, Alexander; Mori, Gregor; Hönig, Stefan; Haubner, Roland

doi:10.1016/j.corsci.2021.109241

Cited by 19 publications

(32 citation statements)

References 15 publications

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“…After corrosion tests with N10276 under the same conditions as in the prior experiments, the material N10276 showed a different behavior. The results of N10276 are compared with the findings of the materials S31400 and N06600, which were published in previous studies [15,16]. A detailed comparison can be found in the Discussions section in chapter 4.3.…”

Section: Methodsmentioning

confidence: 85%

“…This volumetric flow rate corresponds to a linear gas flow velocity of around 0.004 m/s at 480 • C and of around 0.005 m/s at 680 • C. Before the experiments started, as well as during the heating and cooling process of the silica glass tube, the chamber was flushed with nitrogen. A more detailed experimental procedure can be found elsewhere [2,15]. volatile metal chlorides, which may slow down the penetration of sulfur containing species.…”

Section: Methodsmentioning

confidence: 99%

“…Before the experiments started, as well as during the heating and cooling process of the silica glass tube, the chamber was flushed with nitrogen. A more detailed experimental procedure can be found elsewhere [2,15]. In this study, corrosion experiments were performed with the material N10276 (also known as 2.4819 or NiMo16Cr15W).…”

Section: Methodsmentioning

confidence: 99%

“…These should be specified in future works to find an appropriate reactor material. Thus, the corrosion resistance of several austenitic steels was investigated under conditions simulating the pyrolysis process of our industrial partner and some corrosion mechanisms to explain the formation of the complex corrosion layers for these materials were developed [2,3,15,16].…”

Section: Introductionmentioning

confidence: 99%

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Corrosion of N10276 in a H2S, HCl, and CO2 Containing Atmosphere at 480 °C and 680 °C

Nimmervoll

Mori

Bucher

et al. 2021

Metals

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In several industrial processes, metallic materials suffer from chlorine- and sulfur-induced high-temperature corrosion. In previous studies, several steels have been tested at laboratory scale in a simulated gas atmosphere of a pyrolysis process of anthropogenic resources. In this paper, we propose a model on the course of corrosion in a H2S and HCl-containing atmosphere for N10276, which contains, besides iron, chromium, and nickel, also molybdenum as main alloying element. Bearing in mind the impact of the main alloying elements, as well as thermodynamic considerations and kinetic effects, the corrosion behavior of N10276 in a H2S and HCl-containing atmosphere at 480 °C and 680 °C can be explained. In addition, the corrosion behavior of N10276 is compared with earlier tested Fe-Cr-Ni alloys and differences in the corrosion behavior are stated within this paper.

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Section: Methodsmentioning

confidence: 85%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Corrosion of N10276 in a H2S, HCl, and CO2 Containing Atmosphere at 480 °C and 680 °C

Nimmervoll

Mori

Bucher

et al. 2021

Metals

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“…Figure 8 shows the possible mechanism of Alloy 825 in the experimental environment. The corrosion behavior of passive film at lower temperature has been studied extensively (Zhang and Shoesmith, 2013;Henderson et al, 2019;JianqiaoYang et al, 2020;Li et al, 2020b;Nimmervoll et al, 2021). As Figure 8A shows, Mo is enriched in the outer layer and Ni/Cr in the metal border.…”

Section: Discussionmentioning

confidence: 99%

Corrosion Behavior and Passive Film Composition of Alloy 825 in High Temperature and High H2S-CO2 Containing Environment

Feng

Fan²,

Wang

et al. 2021

Front. Mater.

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The effect of high temperature on corrosion behavior and passive film composition of Ni-based alloy 825 in H2S-containing environment was investigated by Confocal Laser Microscope (CLM), Scanning Electron Microscope (SEM), Energy Dispersive Spectrometer (EDS), and X-ray Photoelectron Spectroscopy (XPS). The experiment was carried out at 150 and 230°C in NaCl solution. The partial pressure of H2S was set to 1.2 MPa and CO2 was set to 3.2 MPa. The results showed that Ni-based alloy 825 presented good general corrosion resistance. Pitting corrosion was likely to occur at 230°C because of Cr depleted in the passive film. NiS appeared at high temperature and is damaging to protectiveness of passive film.

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High temperature corrosion behavior of alloys in reducing HCl and H2S containing environments: Thermodynamical and experimental assessment

Nimmervoll

Mori

Bucher

et al. 2022

Materials & Corrosion

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High-temperature corrosion mechanisms in reducing atmospheres containing HCl (3.8 vol%) and a varying amount of H 2 S (0.02 -2 vol%) were developed for several alloys between 420°C and 680°C. These mechanisms are mainly based on practical observations and kinetic considerations-and less on thermodynamic data. This is due to the complexity of these mixed gas atmospheres, volatile corrosion products, and the ever-changing conditions within the corrosion layer, which made it not possible to predict and calculate the actual conditions in the corrosion zone. In this article, a detailed thermodynamic analysis of previously achieved corrosion mechanisms and experimental observations is presented. Correlations and deviations between thermodynamic calculations and practical findings are stated and discussed. The corrosion behavior of ferritic K90941, which performs worse than corrosionresistant austenitic alloys, except for one test condition at 580°C in the atmosphere with 0.2 vol% H 2 S, is explained and supported by thermodynamic data. By combining experiments with thermodynamics, corrosion mechanisms in reducing HCl and H2S-containing atmospheres are explained.

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

Cited by 19 publications

References 15 publications

Corrosion of N10276 in a H2S, HCl, and CO2 Containing Atmosphere at 480 °C and 680 °C

Corrosion of N10276 in a H2S, HCl, and CO2 Containing Atmosphere at 480 °C and 680 °C

Corrosion Behavior and Passive Film Composition of Alloy 825 in High Temperature and High H2S-CO2 Containing Environment

High temperature corrosion behavior of alloys in reducing HCl and H2S containing environments: Thermodynamical and experimental assessment

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