304不锈钢在硫酸盐还原菌环境中的腐蚀电化学特性研究

The Electrochemical Corrosion Research of 304 Stainless Steel in Sulfate-Reducing Bacteria

采用自腐蚀电位、动电位扫描法、交流阻抗法研究了304不锈钢在无菌海水和在培养基中加入硫酸盐还原菌环境中的腐蚀行为。实验结果表明,硫酸盐还原菌参与了不锈钢的电化学腐蚀,加速了腐蚀速度,破坏了不锈钢的钝化层,诱导了不锈钢点蚀的发生。

Corrosion behaviors of 304 stainless steel in sterile sea water and have sulfate-reducing bacteria＇ s sea water were researched by open-circuit potential of electrode, the cyclic potention dynamic polarization and the electrochemical impedance spectrometry. The test results show that the sulfate-reducing bacteria participate in electrochemical corrosion, accelerate the localized corrosion, destroy passivation and induce pit corrosion to the stainless steel.