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<p>Brass is widely used in drinking water distribution systems. For assembly of piping elements, valves and associated components. When buried in aggressive soil, these materials can be prone to corrosion, depending on variables such as soil type, climate and alloy composition. The aim of this study was, on the one hand, to assess the corrosion resistance of two Ecobrass alloys (E1 and E2) buried in the aggressive soils of the Marrakech region in southern Morocco; on the other hand, to evaluate their surface condition with a view to their potential use in drinking water pipes. Corrosion behavior was assessed through electrochemical testing, including polarization curve recording and analysis by electrochemical impedance spectroscopy (EIS), accompanied by surface observations by scanning electron microscopy (SEM) coupled with energy-dispersive spectroscopy (EDS). PDP tests showed that E2 had the lowest corrosion current density. Electrochemical impedance spectroscopy (EIS) results showed that polarization resistance (Rp) for E2 increased with increasing immersion time. Compared with E1, E2 showed much better corrosion resistance in the soil studied. These data are in line with the conclusions of the SEM/EDS analysis, the results of the EIS and the PDP measurements.</p>

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Study of the Corrosivity of Two Lead-Free Brass Alloys Used in Drinking Water Supply Pipes in an Aggressive Soil

  • 期刊论文

  • 发表日期：

    2025年6月6日

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  • Khalid Saber,
  • Abdessamad Ouedrhiri,
  • Fatima Hamouche,
  • Abdeslam El Amri,
  • Khalil El Mabrouk,
  • Mouhsine Galai,
  • Nadia Dkhireche

摘要

Brass is widely used in drinking water distribution systems. For assembly of piping elements, valves and associated components. When buried in aggressive soil, these materials can be prone to corrosion, depending on variables such as soil type, climate and alloy composition. The aim of this study was, on the one hand, to assess the corrosion resistance of two Ecobrass alloys (E1 and E2) buried in the aggressive soils of the Marrakech region in southern Morocco; on the other hand, to evaluate their surface condition with a view to their potential use in drinking water pipes. Corrosion behavior was assessed through electrochemical testing, including polarization curve recording and analysis by electrochemical impedance spectroscopy (EIS), accompanied by surface observations by scanning electron microscopy (SEM) coupled with energy-dispersive spectroscopy (EDS). PDP tests showed that E2 had the lowest corrosion current density. Electrochemical impedance spectroscopy (EIS) results showed that polarization resistance (Rp) for E2 increased with increasing immersion time. Compared with E1, E2 showed much better corrosion resistance in the soil studied. These data are in line with the conclusions of the SEM/EDS analysis, the results of the EIS and the PDP measurements.