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Studying Corrosion Resistance in Stainless Chrome-Nickel Steels and Corrosion-Resistant Nickel Alloys Exposed to the Hot Concentrated Sulfuric Acid

Authors: Zolotukhin S.E., Kurbatov A.Yu., Vetrova M.A., Grunsky V.N. Published: 16.12.2023
Published in issue: #6(111)/2023  
DOI: 10.18698/1812-3368-2023-6-83-96

 
Category: Chemistry | Chapter: Electrochemistry  
Keywords:

Abstract

More and more attention is being paid to studying corrosion processes occurring on the contact surfaces of technological equipment operating in the extremely aggressive environments (temperature and caustic reagents). The failure of such equipment is causing not only serious economic losses, but also possible casualties and serious ecological consequences. To prevent equipment corrosion, the nickel-based materials are used, but fundamental corrosion studies were currently not presented, which determined relevance of the presented work. As part of the experiments, data were obtained on corrosion resistance of stainless chrome-nickel steels and corrosion-resistant nickel alloys within the sulfuric acid production process using the double contact--double adsorption (DC--DA) technology. It was established that with increasing concentration of the sulfuric acid (97.6--100 % (wt.)), the corrosion rate decreased nonlinearly with the minimum at the sulfuric acid concentration of 99.6 % (wt.). It was experimentally determined that corrosion rate of the nickel-containing materials under technological conditions was not exceeding 0.1 mm/g, which in turn could be used to calculate the service life, as well as to develop schedules for maintenance and repair of a system.It was proven that the main contribution to mass loss in metal structures was caused by the electrochemical corrosion

Please cite this article in English as:

Zolotukhin S.E., Kurbatov A.Yu., Vetrova M.A., et al. Studying corrosion resistance in stainless chrome-nickel steels and corrosion-resistant nickel alloys exposed to the hot concentrated sulfuric acid. Herald of the Bauman Moscow State Technical University, Series Natural Sciences, 2023, no. 6 (111), pp. 83--96 (in Russ.). DOI: https://doi.org/10.18698/1812-3368-2023-6-83-96

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