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The paper presents the results of laboratory studies of corrosion-abrasive wear of a screw dissolver made of duplex steel 1.4462 in an environment simulating potassium chloride production conditions (4RU of JSC "Belaruskali"). The influence of mechanical impurities (abrasive), temperature (105 °C), pH (4-8), artificial air supply, and incomplete immersion mode was experimentally studied. It has been established that the presence of abrasive increases the mass loss rate by 10 times (up to 0,015 g/day) compared to purely chemical corrosion [2]. The most intense pitting damage is observed in areas with oxygen access. An alkaline environment (pH= 8) promotes the formation of protective deposits, while an acidic one (pH= 4–7) intensifies corrosion [7]. Equipment operation with incomplete immersion of the agitator increases the corrosion rate by 40 % [2, 9]. Duplex steel 1.4462 shows high resistance to chemical corrosion, but its service life is sharply reduced under the combined influence of abrasive and non-standard operating conditions [2, 20]. Practical recommendations for extending equipment service life are given.
1. Technological Regulations for Potassium Chloride Production. JSC "Belaruskali". Soligorsk, 2023. 150 p.
2. Naumovich P.N. Research Report on the Influence of the Potassium Chloride Production Process on the Corrosion and Abrasive Wear of a Screw Dissolver Made of Duplex Steel 1.4462. Soligorsk: LLC “Proektnaya organizatsiya UMKA”, 2025. 65 p.
3. Zhang Y., Tan H., Wang Z., Li X., Jiang Y. Synergistic erosion-corrosion behavior of 2205 duplex stainless steel in chloride-sand slurry: Mechanisms and effect of sand concentration. Wear. 2022. Vol. 494 – 495, article 204248. P. 1 – 12.
4. Fattah-alhosseini A., Vafaeian S. Passivity of 2205 duplex stainless steel in alkaline solutions with differential pH values. Journal of Materials Engineering and Performance. 2020. Vol. 29. P. 1245 – 1253.
5. Alvarez R.B., Martin H.J., Horwat J., Aperador W. The role of pH and chloride concentration on the pitting corrosion of duplex steel. Electrochimica Acta, 2019. Vol. 307. P. 362 – 371.
6. Sathler L., Pimenta G.S., da Cunha Belo M. Crevice corrosion of lean duplex stainless steel 2101 in chloride media: Influence of pH and temperature. Construction and Building Materials, 2020, vol. 262, art-ticle 120085. P. 1 – 10.
7. Loto R.T. Pitting corrosion evaluation of austenitic and duplex stainless steels in acidic chloride environments. Journal of Materials Research and Technology. 2020. Vol. 9.No. 3. P. 4219 – 4228.
8. Jiang Y., Xu N., Zhou H., Wang J. Investigation on erosion-corrosion behavior of 2205 duplex stain-less steel under impingement by NaCl solution with sand particles. Engineering Failure Analysis. 2021. Vol. 119. article 104981. P. 1 – 13.
9. Tavares S.S.M., Pardal J.M., da Silva, M.R., de Oliveira, C.A.S. Failure analysis of a duplex stainless steel flange in a chloride environment due to crevice and differential aeration corrosion. Engineering Failure Analysis, 2019. Vol. 103. P. 308 – 315.
10. Zhou E., Li H., Xu D., Zhang L., Liu C., Wang J., Li Y., Wang F. Accelerated corrosion of 2205 du-plex stainless steel caused by marine aerobic Pseudomonas aeruginosa biofilm. Bioelectrochemistry. 2019. Vol. 123. P. 34 – 41.
11. Ghods P., Isgor O.B., Bensebaa F., Kingston D. Angle-resolved XPS study of carbon steel passivity at different pH values. Applied Surface Science. 2019. Vol. 495. article 143562. P. 1 – 9.
12. Bhola S.M., Bhola R., Jain L., Bhola A. Corrosion issues in potassium chloride mining and processing: a review. International Journal of Corrosion and Scale Inhibition. 2021. Vol. 10.No. 3. P. 1024 – 1045.
13. Chen X., Li X., Zhang L., Wang J., Li Y. Synergistic effect of abrasion and corrosion on wear re-sistance of 2205 duplex stainless steel in simulated seawater with sand. Tribology International. 2021. Vol. 155, article 106767. P. 1 – 12.
14. Oskarsson R., Stenvall P., Leffler B. The influence of sand content on erosion-corrosion of stainless steels in seawater. Wear. 2022. Vol. 488 – 489. article 204157. P. 1 – 11.
15. Kocijan A., Donik Č., Jenko M. Electrochemical study of the corrosion behavior of duplex stainless steel in simulated concrete pore solution with chlorides under oxygen diffusion control. Journal of the Electrochemical Society. 2020. Vol. 167.No. 8. article 081501. P. 1 – 9.
16. Zhao H., Zhang Z., Zhang H., Hu J., He L. Effect of chloride ion concentration and temperature on the corrosion behavior of duplex stainless steel in simulated concrete pore solutions. Construction and Building Materials. 2022. Vol. 320. article 126251. P. 1 – 12.
17. Silva C.C., Miranda H.C., Farias J.P., de Albuquerque V.H.C. Microstructure and corrosion resistance of welded joints of duplex stainless steel UNS S32205. Journal of Materials Research and Technology. 2019. Vol. 8.No. 2. P. 2227 – 2236.
18. Wang Q., Zhang B., Qiu S., Li W., Liu Y. Effect of temperature on passive film and pitting corrosion of 2507 super duplex stainless steel in chloride solutions. Journal of Materials Research and Technology. 2022. Vol. 18. P. 2985 – 2997.
19. Kumar S., Sharma C., Gupta P. A review on erosion-corrosion of engineering materials in aggressive slurry environments. Journal of Bio- and Tribo-Corrosion, 2022. Vol. 8.No. 1. article 15. P. 15 – 32.
20. Li J., Jiang Y., Wang F. Effect of microstructure on the corrosion and erosion-corrosion behavior of 2507 super duplex stainless steel. Corrosion Science. 2021. Vol. 183. article 109305. P. 109305 – 109315.
2. Naumovich P.N. Research Report on the Influence of the Potassium Chloride Production Process on the Corrosion and Abrasive Wear of a Screw Dissolver Made of Duplex Steel 1.4462. Soligorsk: LLC “Proektnaya organizatsiya UMKA”, 2025. 65 p.
3. Zhang Y., Tan H., Wang Z., Li X., Jiang Y. Synergistic erosion-corrosion behavior of 2205 duplex stainless steel in chloride-sand slurry: Mechanisms and effect of sand concentration. Wear. 2022. Vol. 494 – 495, article 204248. P. 1 – 12.
4. Fattah-alhosseini A., Vafaeian S. Passivity of 2205 duplex stainless steel in alkaline solutions with differential pH values. Journal of Materials Engineering and Performance. 2020. Vol. 29. P. 1245 – 1253.
5. Alvarez R.B., Martin H.J., Horwat J., Aperador W. The role of pH and chloride concentration on the pitting corrosion of duplex steel. Electrochimica Acta, 2019. Vol. 307. P. 362 – 371.
6. Sathler L., Pimenta G.S., da Cunha Belo M. Crevice corrosion of lean duplex stainless steel 2101 in chloride media: Influence of pH and temperature. Construction and Building Materials, 2020, vol. 262, art-ticle 120085. P. 1 – 10.
7. Loto R.T. Pitting corrosion evaluation of austenitic and duplex stainless steels in acidic chloride environments. Journal of Materials Research and Technology. 2020. Vol. 9.No. 3. P. 4219 – 4228.
8. Jiang Y., Xu N., Zhou H., Wang J. Investigation on erosion-corrosion behavior of 2205 duplex stain-less steel under impingement by NaCl solution with sand particles. Engineering Failure Analysis. 2021. Vol. 119. article 104981. P. 1 – 13.
9. Tavares S.S.M., Pardal J.M., da Silva, M.R., de Oliveira, C.A.S. Failure analysis of a duplex stainless steel flange in a chloride environment due to crevice and differential aeration corrosion. Engineering Failure Analysis, 2019. Vol. 103. P. 308 – 315.
10. Zhou E., Li H., Xu D., Zhang L., Liu C., Wang J., Li Y., Wang F. Accelerated corrosion of 2205 du-plex stainless steel caused by marine aerobic Pseudomonas aeruginosa biofilm. Bioelectrochemistry. 2019. Vol. 123. P. 34 – 41.
11. Ghods P., Isgor O.B., Bensebaa F., Kingston D. Angle-resolved XPS study of carbon steel passivity at different pH values. Applied Surface Science. 2019. Vol. 495. article 143562. P. 1 – 9.
12. Bhola S.M., Bhola R., Jain L., Bhola A. Corrosion issues in potassium chloride mining and processing: a review. International Journal of Corrosion and Scale Inhibition. 2021. Vol. 10.No. 3. P. 1024 – 1045.
13. Chen X., Li X., Zhang L., Wang J., Li Y. Synergistic effect of abrasion and corrosion on wear re-sistance of 2205 duplex stainless steel in simulated seawater with sand. Tribology International. 2021. Vol. 155, article 106767. P. 1 – 12.
14. Oskarsson R., Stenvall P., Leffler B. The influence of sand content on erosion-corrosion of stainless steels in seawater. Wear. 2022. Vol. 488 – 489. article 204157. P. 1 – 11.
15. Kocijan A., Donik Č., Jenko M. Electrochemical study of the corrosion behavior of duplex stainless steel in simulated concrete pore solution with chlorides under oxygen diffusion control. Journal of the Electrochemical Society. 2020. Vol. 167.No. 8. article 081501. P. 1 – 9.
16. Zhao H., Zhang Z., Zhang H., Hu J., He L. Effect of chloride ion concentration and temperature on the corrosion behavior of duplex stainless steel in simulated concrete pore solutions. Construction and Building Materials. 2022. Vol. 320. article 126251. P. 1 – 12.
17. Silva C.C., Miranda H.C., Farias J.P., de Albuquerque V.H.C. Microstructure and corrosion resistance of welded joints of duplex stainless steel UNS S32205. Journal of Materials Research and Technology. 2019. Vol. 8.No. 2. P. 2227 – 2236.
18. Wang Q., Zhang B., Qiu S., Li W., Liu Y. Effect of temperature on passive film and pitting corrosion of 2507 super duplex stainless steel in chloride solutions. Journal of Materials Research and Technology. 2022. Vol. 18. P. 2985 – 2997.
19. Kumar S., Sharma C., Gupta P. A review on erosion-corrosion of engineering materials in aggressive slurry environments. Journal of Bio- and Tribo-Corrosion, 2022. Vol. 8.No. 1. article 15. P. 15 – 32.
20. Li J., Jiang Y., Wang F. Effect of microstructure on the corrosion and erosion-corrosion behavior of 2507 super duplex stainless steel. Corrosion Science. 2021. Vol. 183. article 109305. P. 109305 – 109315.
Naumovich P.N. Influence of technological parameters of potassium chloride production on corrosion-abrasive wear of double-layer steel 1.4462. Chemical Bulletin. 2026. 9 (1). 2. https://doi.org/10.58224/2619-0575-2026-9-1-2