Geothermal brines often contain high amounts of lead and copper ions that can precipitate as native Cu⁰ and Pb⁰ as consequence of galvanic corrosion when brines react with carbon steel materials. This contribution evaluates which materials could overcome the problem of galvanic corrosion at geothermal environment.

The behavior of these materials in water containing high chloride concentration (> 100 g/L NaCl) as well as various amounts of dissolved PbCl₂ and/or CuCl₂ was characterized by electrochemical and exposure measurements.

Both methods reveal carbon steel suffers corrosion susceptibility, accompanied by Cu° and/or Pb° precipitation on the surface. Electrochemical measurements on stainless steels result in significant difference in corrosion and repassivation potentials (E_corr = −189 mV, E_rep =70 mV), indicating a good corrosion resistance.

地热盐水通常包含大量的铅和铜离子，当盐水与碳钢材料发生反应时，由于电化腐蚀，它们可能会以天然Cu ⁰和Pb ^0的形式沉淀。该贡献评估了哪些材料可以克服地热环境中的电偶腐蚀问题。

这些材料在高氯化物浓度（> 100 g / L NaCl）以及各种溶解的PbCl ₂和/或CuCl ₂的水中的行为通过电化学和暴露测量来表征。

两种方法都表明碳钢易受腐蚀，并伴有表面上的Cu°和/或Pb°沉淀。不锈钢上的电化学测量结果导致腐蚀和再钝化电位存在显着差异（E _corr = -189 mV，E _rep = 70 mV），表明具有良好的耐腐蚀性。