Impact of Deposits and Their Morphology on the Active Corrosion of Iron in Chlorine- and Sulfur-Containing Atmospheres in the Temperature Range of 350–500 °C

Krumm, Ludmila; Galetz, Mathias C.

doi:10.1007/s11085-018-9845-6

Cited by 16 publications

(2 citation statements)

References 27 publications

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“…However, a comparison with the literature suggests that such low amounts are not expected to have a strong effect on corrosion either as long as oxygen partial pressure is high. 29,58,59 These considerations are in good agreement with the behavior of X20CrMoV12-1 and DMV 310 N under co-firing conditions. This confirms that the impact of co-firing low amounts of straw on superheater degradation can be reasonably managed.…”

Section: Discussionsupporting

confidence: 82%

“…However, the density of the embedding media can cause a strong gradient of atmospheric pressure toward the sample surface and a shift from an oxidizing to a reducing atmosphere as previously shown for waste incineration as well. 58,69 This is additionally supported by the proposed mechanisms according to reactions 7, 9, and 10, which consume the available oxygen leading to a further decrease of its partial pressure. While simultaneously low chlorine and oxygen activities during co-firing still guarantee stabilization of Cr and Mn oxides, a higher chlorine partial pressure, as expected under straw firing conditions because of the abovementioned mechanisms promotes the formation of different metal chlorides instead following reaction 11.…”

Section: Discussionmentioning

confidence: 74%

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Long-Term Corrosion Behavior of Cr Diffusion Coatings on Ferritic–Martensitic Superheater Tube Material X20CrMoV12-1 under Conditions Mimicking Biomass (Co-)firing

et al. 2020

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Co-firing of biomass is currently attracting more attention because it is a major step toward reducing CO2 emissions from power generation and can be directly realized within existing plants. Despite its many benefits, considerable challenges in terms of corrosion prevention and durability of the plant components arise because of highly increased amounts of chlorine and alkali species inside the steam generator. Ferritic–martensitic superheater tube steels are particularly challenged and subjected to rapid degradation with the pursuit of achieving higher biomass-to-coal firing ratios. In order to improve the corrosion behavior of such structural materials in environments relevant for biomass (co-)firing, the present paper suggests enrichment of Ni (against chlorine-induced attack) and Cr (against sulfur-induced attack) in the surfaces of the metallic tubes. For this purpose, a Cr and a combined Ni + Cr diffusion coating were manufactured on ferritic–martensitic X20CrMoV12-1 steel and investigated in environments simulating pure coal, co-firing, as well as pure biomass firing (straw). Exposure tests were conducted at 650 °C for up to 1900 h in SO2- and/or HCl-containing atmospheres with specimens embedded in real power plant combustion ashes. Pure biomass firing clearly accelerated the corrosion attack compared to partial substitution of coal and pure coal firing. However, the Ni + Cr coating performed very well and increased the corrosion resistance of the ferritic–martensitic substrate. As far as degradation mechanisms are concerned, the first stage of the attack turned out to be dominated by chlorine followed by a shift toward sulfur-induced corrosion.

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Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 74%

Long-Term Corrosion Behavior of Cr Diffusion Coatings on Ferritic–Martensitic Superheater Tube Material X20CrMoV12-1 under Conditions Mimicking Biomass (Co-)firing

et al. 2020

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Corrosion of 15Mo3 carbon steel superheater tubes in waste incineration plants: A comparison between a field‐returned tube and laboratory tests

Krumm

Galetz

2019

Materials & Corrosion

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In this study, a field‐returned superheater tube of carbon steel 16Mo3 (1.5415) was analyzed in detail. In addition to cross‐section analysis, different scales were investigated layer by layer using microscopic, diffraction, and spectroscopic techniques. The corrosion products can be divided into three layers: The layer adjacent to the metallic tube surface was an iron‐ and chlorine‐rich scale, followed by an FeS layer present at the gas flow side, and the outermost layer was an iron oxide scale consisting of Fe3O4 and α‐Fe2O3. The different mechanisms responsible for the structure of such scale formation and the different corrosion products formed at the tube are discussed. Furthermore, the root cause for the disability to form a protective scale under such conditions was identified by comparison with results from laboratory tests.

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High-temperature corrosion mechanism analysis of 310S alloy in typical MSWI flue gas environment at 460–580 °C

Liu,

Duan,

Zheng

et al. 2023

J Mater Cycles Waste Manag

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Impact of Deposits and Their Morphology on the Active Corrosion of Iron in Chlorine- and Sulfur-Containing Atmospheres in the Temperature Range of 350–500 °C

Cited by 16 publications

References 27 publications

Long-Term Corrosion Behavior of Cr Diffusion Coatings on Ferritic–Martensitic Superheater Tube Material X20CrMoV12-1 under Conditions Mimicking Biomass (Co-)firing

Long-Term Corrosion Behavior of Cr Diffusion Coatings on Ferritic–Martensitic Superheater Tube Material X20CrMoV12-1 under Conditions Mimicking Biomass (Co-)firing

Corrosion of 15Mo3 carbon steel superheater tubes in waste incineration plants: A comparison between a field‐returned tube and laboratory tests

High-temperature corrosion mechanism analysis of 310S alloy in typical MSWI flue gas environment at 460–580 °C

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