舟形藻在假單胞菌菌膜上的附著及對316L不銹鋼腐蝕的影響Attachment of Navicula on Pseudomons Aeruginosa PAO1 Biofilm and Its Corrosion Behavior on 316L Stainless Steel

為了揭示海洋微藻在菌膜上的附著規(guī)律及其對金屬腐蝕的影響,采用原子力顯微鏡測試探究舟形藻在銅綠假單胞菌菌膜條件下的附著,并通過電化學(xué)阻抗譜和動電位極化曲線方法研究菌膜存在與舟形藻附著對316L不銹鋼腐蝕的影響.結(jié)果表明,在附著前期菌膜抑制舟形藻的附著,后期則促進(jìn)舟形藻的附著.電化學(xué)測試結(jié)果顯示,舟形藻的存在增大了316L不銹鋼的腐蝕傾向,并使腐蝕速率增大;而菌膜的附著一定程度上抑制了舟形藻對316L不銹鋼的腐蝕.

The attachment of microalgae navicula on pseudomons aeruginosa PAO1 biofilm and its influence on the electrochemical behavior of 316L stainless steel were investigated by atomic force microscopy (AFM),electrochemical impedance spectroscopy (EIS) and dynamic potential polarization curve for a better understanding on the attachment of marine microalgae on metal material and its impact on metal corrosion.The results showed that the bacteria biofilm inhibited navicula attachment in the initial stage and promoted navicula attachment in the later stage.Electrochemical results revealed that navicula attachment on 316L stainless steel increased the corrosion tendency of 316L stainless steel,and increased the corrosion rate.However,the bacteria biofilm in some extent inhibited the corrosion of 316L stainless steel.

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