(中國(guó)科學(xué)院 金屬研究所, 金屬腐蝕與防護(hù)國(guó)家重點(diǎn)實(shí)驗(yàn)室,
沈陽(yáng) 110016)
摘 要: 利用微生物分析、 交流阻抗測(cè)試技術(shù)、 掃描電鏡及表面能譜等方法, 在室內(nèi)模擬條件下研究了海底土中硫酸鹽還原菌對(duì)鋅腐蝕的影響,以及在以接菌及滅菌的海底土構(gòu)成的宏電池腐蝕中鋅的腐蝕行為。 180d的試驗(yàn)結(jié)果表明: 海底土中硫酸鹽還原菌增強(qiáng)鋅的腐蝕, 鋅在接菌泥中的平均腐蝕速率及點(diǎn)蝕深度均大于在滅菌泥中的平均腐蝕速率及點(diǎn)飾深度,平均腐蝕速率相差7.0倍, 點(diǎn)蝕速率相差15.0倍以上。 在接菌和滅菌海底土構(gòu)成宏電池時(shí), 接菌海底土中鋅作為陽(yáng)極,腐蝕速率比自然腐蝕狀態(tài)下有所增大, 加速率為12.7%,而在滅菌海底土中鋅作為陰極, 腐蝕速率比自然腐蝕狀態(tài)下有所減小。
關(guān)鍵字: 鋅; 海底土; 硫酸鹽還原菌
corrosion of zinc in marine sediment
(State Key Lab for Metals Corrosion and Protection,
Institute of Metals Research,
Chinese Academy of Sciences, Shenyang 110016, China)
Abstract:The effects of Sulfate Reducing Bacteria(SRB) on corrosion of zinc in marine sediment and macrocell corrosion of Zn in marine sediment with or without SRB were studied by using bacterial analyses, electrochemical impedance spectroscopy, scanning electron microscopy (SEM) and EDAX. The results show the pitting rate of zinc in marine sediment with SRB is 15.0times of those in marine sediment without SRB. The corrosion of samples in the marine sediment with SRB is accelerated as the anode of macrocell.
Key words: zinc; marine sediment; sulfate reducing bacteria


