全面腐蚀控制
全麵腐蝕控製
전면부식공제
TOTAL CORROSION CONTROL
2013年
6期
23-26,50
,共5页
梅鹏%刘涛%吴堂清%孙成%闫茂成%许进%于星%于长坤
梅鵬%劉濤%吳堂清%孫成%閆茂成%許進%于星%于長坤
매붕%류도%오당청%손성%염무성%허진%우성%우장곤
酸性红壤%X100管线钢%硫酸盐还原菌%电化学%微生物腐蚀
痠性紅壤%X100管線鋼%硫痠鹽還原菌%電化學%微生物腐蝕
산성홍양%X100관선강%류산염환원균%전화학%미생물부식
acidic red soil%X100 pipeline steel%sulfate-reducing bacteria%electrochemistry%microbiologically induced corrosion
@@@@采用开路电位、线性极化曲线和阻抗谱等电化学手段，结合扫描电子显微镜研究了酸性红壤浸出液中硫酸盐还原菌对X100管线钢腐蚀的影响。研究结果如下：实验初期硫酸盐还原菌的存在降低了管线钢的自腐蚀电位，增加了管线钢腐蚀敏感性，促进了X100管线钢的腐蚀；实验中后期硫酸盐还原菌的生理活动改变了溶液中和X100管线钢表面的化学、电化学状态，抑制了腐蚀；硫酸盐还原菌的生理活动升高了酸性土壤浸出液的pH值，改变了X100管线钢表面膜层的结构，结合层出现了韦伯扩散，阻碍了腐蚀产物的扩散。
@@@@採用開路電位、線性極化麯線和阻抗譜等電化學手段，結閤掃描電子顯微鏡研究瞭痠性紅壤浸齣液中硫痠鹽還原菌對X100管線鋼腐蝕的影響。研究結果如下：實驗初期硫痠鹽還原菌的存在降低瞭管線鋼的自腐蝕電位，增加瞭管線鋼腐蝕敏感性，促進瞭X100管線鋼的腐蝕；實驗中後期硫痠鹽還原菌的生理活動改變瞭溶液中和X100管線鋼錶麵的化學、電化學狀態，抑製瞭腐蝕；硫痠鹽還原菌的生理活動升高瞭痠性土壤浸齣液的pH值，改變瞭X100管線鋼錶麵膜層的結構，結閤層齣現瞭韋伯擴散，阻礙瞭腐蝕產物的擴散。
@@@@채용개로전위、선성겁화곡선화조항보등전화학수단，결합소묘전자현미경연구료산성홍양침출액중류산염환원균대X100관선강부식적영향。연구결과여하：실험초기류산염환원균적존재강저료관선강적자부식전위，증가료관선강부식민감성，촉진료X100관선강적부식；실험중후기류산염환원균적생리활동개변료용액중화X100관선강표면적화학、전화학상태，억제료부식；류산염환원균적생리활동승고료산성토양침출액적pH치，개변료X100관선강표면막층적결구，결합층출현료위백확산，조애료부식산물적확산。
Effect of sulphate-reducing bacteria (SRB) on corrosion of pipeline X100 steel in acidic red soil extract solution was investigated using linear polarization technique, electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM). SRB tends to accelerate corrosion of pipeline X100 steel in initial stage of the experiment, while to inhibit corrosion at the end of experiment. The physiological activity of SRB may alter the pH of acidic red soil extract solution and chemical and electrochemical state of the surface of pipeline X100 steel. What’s more, a product layer was detected on the surface of pipeline X100 steel in inoculated environment, which may lead to the Weber impedance.
