防硫化氫腐蝕表面噴涂技術(shù)

1、西安石油大學(xué)碩士學(xué)位論文防硫化氫腐蝕表面噴涂技術(shù)姓名：羅興申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料加工工程指導(dǎo)教師：石凱20060515英文摘要Subject：SurfaceSprayingTechnologyforPreventingWetH2SCorrosionSpecialty：MaterialsandEngineeringNaIlle：Lu。Xing(stgnacuIe)絲生塹QInstructor：ShiKai(stgnature)婦2叢

2、AbstractsSincecorrosionoftubinginoilandgaswellsinextremelysevere，measuressuchasusingcorrosionresistanttubes，coatingtubeswithprotectivelayer，injectionofcorrosioninhibitorandreplacingcorrodedtubingregularlyareoftenusedtode

3、alwithcorrosionproblemsBasedonsummarizingofcommonanti—corrosiontechnologies，theircharacteristicsandprogressofresearchesintiffsfield，thisthesisinvestigatestheinfluenceofsprayingmethodsandpowdertypesOilthemicrostructure，po

4、rosityofcoatinglayersandtheirresistibilitytowethydrogensulfidecorrosion，andtherelationshipbetweencoatingmicrostructureanditsanti—corrosionpropertiesThemicrostructureandcompositionofcoatingareanalyzedbyusingofopticmicrosc

5、opy(OM)，scanningelectronmicroscopy(SEM)andenergyspectroscopyCorrosionmechanismunderwethydrogensulfideenvironmentandvariousfactorsaffectingcorrosionarealsoanalyzedProtectioneffectoffivenickelbasedselffluxingalloys(D20，D40

6、，D60，D6325andH7)andfourbasetypes(N80，J55，PllOandS135)tobasematerialsunderacidcorrosionenvironmentareexploredbyusingofweightlossmethodWeightlossratesofcoatingandbasematerialaretestedalsoTheresearchresultsshowthatsprayingm

7、ethodshavesignificantinfluenceontheporosityofthecoating；(1)Theresistancetohightemperaturesulphidecorrosionofthecoatingisassociatedwiththedensityandoxidecontentinthecoating(2)SpraycoatingissuperiortoflamesprayingandHVOF；(

8、3)Samplesinhydrogensulfideandcarbondioxidecorrosivemediahavehighcorrosionratethatisaccompaniedbydifferentdegreeofpittingorpittinggroups；carbondioxidecausespittingcorrosion；hydrogensulfideacceleratescathodeandanodereactio

9、nthatcausesseverepittingcorrosion；(4)ThemainproductofcorrosionscalesisironsulfideandFeC03；(5)Thepurecoatingimprovecorrosionresistibilityofbasesteelby27—122times；(6)TheresultsofC02、H2S、Crcorrosionexperimentunderthesimulat

10、ionoilfieldconditionshowsthattheCorrosionCapacityofthefivecoatingsbySpraycoatingdecreasesequentiallyinorderofD6325coating，D40coating，D60coating，D20coating，H7coatingInsummary，underthesimulationoilfieldcondition，D6325coati