Page 135 - 腐蚀与防护2024年第十一期

刘金璐, 等: 20钢地面管道在多元热流体中的腐蚀行为评估

EvaluationofCorrosionBehaviorof20SteelGroundPi p elineinMulti p leThermalFluids

1 , 2 2 3 4 , 5 1 1 1
LIUJinlu , LIJun , LILi , LIFu , SUN Hon gy u , LUORenkun , SUNYi p in g

( 1.PetroChinaTarimOilfieldCom p an y , Korla841000 , China ;

2.ChinaUniversit y ofPetroleum ( Bei j in g ), Bei j in g 102249 , China ;

3.CNPCXin j ian gOilField , Karama y 834000 , China ;

4.SichuanBaoshihuaXinshen gOilandGasO p erationServiceCo. , Ltd. , Chen g du610056 , China ;

5.CNPCSouthwestOil& GasFieldCDBO p eratin gCom p an y , Chen g du610021 , China )

Abstract : The g roundp i p elineformulti p lethermalfluidsinwellareaXofXin j ian gOilfieldwasd y namicall ymonitoredb y

corrosioncou p on.There p resentativefailure p i p esectionwasselectedaccordin g tothemonitorin g results.Thewallthickness

measurement , microstructureobservation , corrosionratecalculation , chemicalcom p ositionanal y sisandcorrosionp roduct

anal y siswerecarriedoutfortheobtainedfailed p i p esection , inordertos y ntheticall y evaluatedama g ede g reeandcorrosionrule

ofthefailedp i p esection.Thecorrosionmechanismof p i p elinewasverifiedb y indoorsimulatedcorrosiontest.Theresults

showthat20steel g roundp i p elinewasseriousl ycorrodedinmult i p lethermalfluids.Bainiteand Weidnerstructureswere

observedinthemicrostructureofthefailedp i p esectionsurface , andthecarboncontentofthep i p elinewasreduced.Carbon

dioxidecorrosionoccurredfirst , andthenox yg encorrosionoccurredinthe p i p eline.Ox yg eninthereactantshadthe g reatest

effectonthecorrosionrateofthe p i p eline.

Ke ywords : multi p lethermalfluid ; g round p i p eline ; corrosion monitorin g ; chemicalcom p ositionanal y sis ; corrosion
mechanism

( 上接第93页)

ConstructionandA pp licationofaLo g isticRe g ressionPredictionModelfor

CorrosionFailureofUrbanGasPi p elines

,
,
WANG Min g da , ZHANGBan g WUZhishen g LIYunfei , CAIWenlon g

( Colle g eofMechanicalandElectricalEn g ineerin g , ChinaUniversit y ofPetroleum , Qin g dao26 6580 , China )

Abstract : Inordertobreakthes p acelimitationofthetraditional p redictionmodelofurban g as p i p elinefailureininformation

collectionandcalculation , ap redictionmodelofp i p elinefailurewasbuiltb yusin gcloudenvironment.Firstl y , thehuman-

machine-environment-mana g ementmodelwasreviewed , thefactorsaffectin g urban g as p i p elineswere q ualitativel y anal y zedb y

fishbonedia g ram , andthemainfactorsofurbang asp i p elinefailurewereobtainedusin gclusteranal y sismethod.Then , the

dataofurban g asaccidentandp i p elinedesi g nindexeswerecollected , andtheke y factorsaffectin gurbang asp i p elinefailure

wereextractedb yg eneralizedg re ycorrelationanal y sismethod.Finall y , ap i p elinefailurep redictionmodelbasedonlo g istic

re g ressional g orithmwasestabl ishedinthecloudenvironment , andthefeasibilit y ofthemodelwasverifiedb yp racticalcases.

Theresultsshowthattheaccurac y ofthe p redictionmodelreached89% , whichp rovedthatthemodelwassuitableforfailure

p redictionofurban g as p i p elines.

Ke ywords : safet y en g ineerin g technolo gy science ; urban g as p i p eline ; failureriskp rediction ; lo g isticre g ressional g orithm

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