In this study, the influence of thermoacidophilic archaeon Metallosphaera cuprina on the corrosion of 304 stainless steel was investigated. 304 stainless steel in M. cuprina-inoculated culture medium exhibited more marked pitting corrosion behavior than that seen in sterile culture medium. After 14 days, the average pit depth under M. cuprina biofilms was nearly twice as great as that in sterile culture medium. Electrochemical measurements also showed that 304 stainless steel had lower charge transfer resistance and smaller pitting potential after 14 days of exposure in inoculated culture medium. The ferrous ion oxidation ability of M. cuprina biofilms can cause a change in the composition of passive films and accelerate the anodic dissolution of the steel substrate, to promote the pitting corrosion process at 304 stainless steel.

在这项研究中，研究了嗜酸古菌Metallosphaera cuprina对304不锈钢腐蚀的影响。铜绿假单胞菌接种的培养基中的304不锈钢比无菌培养基显示出更明显的点蚀腐蚀行为。14天后，铜杯分枝杆菌生物膜下的平均凹坑深度几乎是无菌培养基中的平均凹坑深度的两倍。电化学测量还表明，在接种的培养基中暴露14天后，304不锈钢具有较低的电荷转移电阻和较小的点蚀电位。铜楠木的亚铁离子氧化能力 生物膜可引起钝化膜组成的变化，并加速钢基材的阳极溶解，从而促进304不锈钢的点蚀过程。