循环冷却水中硫酸盐还原菌对不锈钢腐蚀行为影响 influence of sulfate-reducing bacteria in circulating cooling water on corrosion behavior of stainless steel.pdfVIP
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循环冷却水中硫酸盐还原菌对不锈钢腐蚀行为影响 influence of sulfate-reducing bacteria in circulating cooling water on corrosion behavior of stainless steel
NO.42013 华北电力技术 NORTHCHINAELECTRICPOWER
·试验研究·
循环冷却水中硫酸盐还原菌对不锈钢
腐蚀行为影响
高建富,李 进,敬朝文,吴芳芳
(北京交通大学土木建筑工程学院,北京100044)
摘要:利用扫描电镜(SEM)、金属表面元素分析、交流阻抗以及极化曲线等分析方法,研究了循环冷却水中
膜被破坏,SS316L与SS317L腐蚀速率增大且在10d达到最大;浸泡中期,SS316L成膜速度较快于SS317L,
生物膜对不锈钢表面起到保护作用,阻塞了导电通路,使腐蚀速率减小;浸泡后期,不锈钢表面生物膜被破
坏,腐蚀速率增大。SS317L极化电阻较大,Mo和cr含量较多,钝化膜不易被破坏,耐蚀性较强。
关键词:硫酸盐还原茵;不锈钢;扫描电镜;交流阻抗;极化曲线
文献标识码:A
中图分类号:TM621.8 文章编号:1003-917l(2013)04-0001-07
Influenceof Bacteriain Water
Sulfate-reducingCirculatingCooling
onCorrosionBehaviorofStainlessSteel
Gao
Jian—fu,LiJin,JingChao—wen,WuFang—fang
SchoolofCivil 100044,China)
(BeijingJiaotongUniversity Engineering,Beijing
the electron surfaceelemental and
Abstract:Byusingscanning microscopy(SEM),metalanalysis,ACimpedance
curve studiedthecorrosionbehaviorofSRBinthe waterto
polarizationanalysismethod,thispaper circulatingcooling
1 in in
SS316LandSS37Lstainlesssteel.Theresultsshowthat is absorbedSS317Lsur-
testingprophase,SRBeasily
filmis 16LandSS317Lcorrosionrateincreasesandreachesthemaximumin10 the
face,passivedamaged,SS3 d;in
isfasterthan onstainlesssteel a roleon
medium-term,SS316L
soaking film-forming SS317L,biofilm playsprotective
the theconductivethatthecorrosionrateis the late—termstainlesssteel
surface,blocking path,SO reduced;insoaking
biofilm
is
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