Page 15 - 腐蚀与防护2024年第十一期

董社霞, 等: 封隔器卡瓦用20CrNiMo钢和20CrMnMo钢在某油田井下工况中的腐蚀行为

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[ 5 ] 石凤琴, 牙乾伊, 郭慧娟, 等. 油田卡瓦封隔器性能分析 saturatedCO 2andCO 2 -saturatedbrineconditions [ J ] .

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anal y sisandmaterialo p timizationofsli p sp ackerused bearin g lowallo yp i p elinesteelinCO 2environmentat

inoilfield [ J ] .Hot Workin g Technolo gy , 2017 , 46 staticandflowin g conditions [ J ] .A pp lied Surface
( 16 ): 257-260. Science , 2013 , 270 : 395-404.

[ 6 ] 王赟. 油田特殊工况因素对 CO 2 腐蚀及缓蚀剂有效性 [ 9 ] 卢宋乐. 含 Cr 低合金钢 CO 2 H 2 S环境腐蚀产物膜形
/

的影响机制[ D ] . 北京: 北京科技大学, 2021. 成及作用机理研究[ D ] . 北京: 北京科技大学, 2018.

WANG Y.Influence mechanism of oilfield s p ecial LUSL.Theformationandim p actin gmechanismof

workin g conditionsonCO 2corrosionandeffectiveness corrosionp roductfilmoflowchromiumallo ysteelin

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ofcorrosioninhibitor [ D ] .Bei j in g : Universit y ofScience CO 2 H 2 Senvironment [ D ] .Bei j in g : Universit y of

andTechnolo gyBei j in g , 2021. ScienceandTechnolo gyBei j in g , 2018.

CorrosionBehavi orof20CrNiMosteeland20CrMnMoSteelforPackerSli p sunder

DownholeConditionsinanOilField

1 1 1 2 2
,
DONGShexia , CHENG Wen j ia , JIN Haonan , ZHAOYulon g LINXue q ian g

( 1.ChinaOilfieldServicesLimitedTian j inBranch , Tian j in300451 , China ;

2.SchoolofMaterialsScienceandEn g ineerin g , ChinaUniversit y ofPetroleum ( EastChina ), Qin g dao266580 , China )

Abstract : Corrosiontestswereconductedon20Cr MnMosteeland20CrNiMosteelfor p ackersli p inthehi g h-tem p erature ,

/
hi g h- p ressureandCO 2 H 2 Senvironmentsimulatin gdee p / ultradee p wellconditions.Thecorrosionbehaviorofthetwo

materialswerecom p aredandstudiedb y meansofscannin gelectron microsco py ( SEM ), ener gydis p ersives p ectrosco py

( EDS ), X-ra y diffraction ( XRD ), X-ra yp hotoelectrons p ectrosco py ( XPS ) andelectrochemicaltestin g .Theresultsshowthat

underthesimulateddee p / ultradee pwellconditions , thecorrosionformof20CrMnMosteelwast yp ical g eneralcorrosion ,

whilethecorrosionformof20CrNiMosteelwas p ittin g corrosion.Thecorrosion p roductsonthesurfacesofthetwomaterials

hadadouble-la y erstructure , andtheoutercorrosion p roductswerecom p osedoflooseflocculentFeSand g ranularFeCO 3.The

,
inne rcorrosion p roductof20CrNiMosteelwascom p osedofFeCO 3 whiletheinnercorrosion p roductof20CrMnMosteelhad

asmallamountofCr ( OH ) inadditiontoFeCO 3.TheexistenceofCr ( OH )
3couldeffectivel y im p rovethep rotectionofthe

3

innercorrosionp roductfilmof20CrMnMosteel , sothatthecorrosionresistanceofthesteelwasobviousl y betterthanthatof

20CrNiMosteel.

/
Ke ywords : ackers li p ; 20CrNiMosteel ; 20CrMnMosteel ; CO 2 H 2 Scorrosion ; corrosionp roductcharacteristic
p

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