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铁细菌对J55钢腐蚀行为的影响

Corrosion and Protection(2016)

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Abstract
陕北某油田的钻井废液中富集铁细菌,用Stoke培养基和CGY培养基对其进行筛选、分离与纯化,得到1株铁细菌纯菌株.采用腐蚀失重法、电化学测试法和扫描电镜(SEM)研究铁细菌对J55钢的腐蚀行为.结果表明:筛选的铁细菌具有典型的普鲁士蓝阳性反应.失重分析表明铁细菌对J55钢腐蚀速率的影响先减小后增大,极化曲线和电化学阻抗谱结果表明,试样的自腐蚀电流密度先减小后增大,交流阻抗先增大后减小.扫描电镜结果显示,电极表面形成了致密的腐蚀产物膜.
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