简介：Thesystematiclaboratorystudiesontherolesofsulfate-reducingbacteria(SRB)inthestresscorrosioncracking(SCC)susceptibilityofX80steelsubjectedtocathodicpotentialhavebeenconductedinanearneutralpHsoilsolutionbyslowstrainratetests.ThecathodicpotentialandSRBincreaseindividuallytheSCCsusceptibilityofthesteelinthesoilsolution.ThepositiveroleoftheSRBactivitiesinSCCsusceptibilitydependsontheprolongationofpre-incubationtime,andtheSCCsusceptibilityofthesteelincreasesundermorenegativepotentials.What’smore,theappliedpotentialsandthepresenceofSRBworktogetherinpromotingtheSCCsusceptibilityofthesteel.But,thecombinedactionbecomeslimitedwithdecreasingcathodicpotentials.Therelationshipsbetweentheplasticitylossandthepermeablehydrogenconcentrationwereestablishedforthesteelinthesoilsolution,regardlessofunderopencircuitpotentialorcathodicpotentials,inboththesterileandSRBinoculatedconditions.Therelationshipsarepracticallysignificantfortheselectionofsafecathodicprotection(CP)potentialsinthepresenceofSRBinsoilenvironment.

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简介：美国几所大学的研究人员合作开发出一种热光电系统，有望将太阳能电池的转换效率提高到80％。该研究成果发表在10月16日出版的《自然·通讯》杂志上。

简介：ConstantloadtestsinNS4solutionpurgedwithN2-5%CO2gasmixturewereconductedonAmericanPetroleumInstitute(API)X80pipelinesteelappliedinthe2ndWest-EastGasPipelineprojectwithandwithoutpreload.TheresultsshowthatcrackscouldinitiateandpropagateinX80pipelinesteelinnear-neutralpHenvironmentunderaconstantloadcondition.Thelifeofcrackinitiationandpropagationincreasedwithdecreasingappliedstress.Preloaddidnotchangeitscorrosionbehaviorobviously.However,preloadreducedthetimeforcrackinitiation.