Abstract Extracellular polymeric substances (EPS) of an aerotolerant sulphate-reducing bacteria were extracted, and they contained mainly polysaccharides and proteins. Effects of EPS on corrosion behavior of copper were investigated through electrochemical methods and surface analysis techniques in 3.5 wt.% NaCl solution under aerobic condition. Results indicated that after a short-period immersion, EPS inhibit copper corrosion, and their inhibition effect decreases with increasing EPS concentration. For long-term immersion, copper corrosion is promoted due to the destruction of the protective Cu2O film by EPS.

中文翻译：

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铜在含耐氧硫酸盐还原菌胞外聚合物的 3.5 wt.% NaCl 溶液中的腐蚀行为研究

摘要 提取了耐氧硫酸盐还原菌胞外聚合物（EPS），主要含有多糖和蛋白质。在有氧条件下，通过电化学方法和表面分析技术在 3.5 wt.% NaCl 溶液中研究 EPS 对铜腐蚀行为的影响。结果表明，短时间浸泡后，EPS对铜的腐蚀有抑制作用，且随着EPS浓度的增加其抑制作用减弱。对于长期浸泡，EPS 会破坏保护性的 Cu2O 膜，从而促进铜腐蚀。