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<p>This study analyzed the corrosion and scaling tendency of brine from Lake Katwe. Geochemical indices such as Langelier Index, Ryznar Index, Puckurious Index, and Aggressive Index, were computed using physiochemical data including TDS, Hardness, pH, alkalinity, and conductivity. The validity of this methodology was evaluated using the Potentiodynamic polarization method for different steel and zinc alloys which include SS316L and SS304, brass, zinc, and galvanized steel at temperatures of 24, 40, and 80&#xa0;°C. SS316L demonstrated the highest corrosion resistance, while zinc exhibited a higher susceptibility to corrosion. Electrochemical results revealed that SS316L had a better corrosion resistance with a rate of 0.009, 1.0, and 1.3 mm/y compared to other metals at 24, 40, and 80&#xa0;°C respectively. Zinc was more susceptible to corrosion with a rate of 0.032, 8.0, and 23.6 mm/y at corresponding temperatures of 24, 40, and 80&#xa0;°C respectively. Surface morphology and EDS analysis of these metals using SEM after brine exposure for 2 months agreed with the findings. The study provides guidance for selecting appropriate materials for future salt plant rehabilitation at Lake Katwe.</p>

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Characterization of Scaling and Corrosion Potential of Lake Katwe Brine

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Mike Bongole,
  • Joseph Ddumba Lwanyaga,
  • Hillary Kasedde,
  • John Baptist Kirabira

摘要

This study analyzed the corrosion and scaling tendency of brine from Lake Katwe. Geochemical indices such as Langelier Index, Ryznar Index, Puckurious Index, and Aggressive Index, were computed using physiochemical data including TDS, Hardness, pH, alkalinity, and conductivity. The validity of this methodology was evaluated using the Potentiodynamic polarization method for different steel and zinc alloys which include SS316L and SS304, brass, zinc, and galvanized steel at temperatures of 24, 40, and 80 °C. SS316L demonstrated the highest corrosion resistance, while zinc exhibited a higher susceptibility to corrosion. Electrochemical results revealed that SS316L had a better corrosion resistance with a rate of 0.009, 1.0, and 1.3 mm/y compared to other metals at 24, 40, and 80 °C respectively. Zinc was more susceptible to corrosion with a rate of 0.032, 8.0, and 23.6 mm/y at corresponding temperatures of 24, 40, and 80 °C respectively. Surface morphology and EDS analysis of these metals using SEM after brine exposure for 2 months agreed with the findings. The study provides guidance for selecting appropriate materials for future salt plant rehabilitation at Lake Katwe.