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CORROSION COMPOSITIONS OF CARBON STEELUNDER ION-SELECTIVE COATINGS BY XPS |
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厦门大学材料科学与工程系 |
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Abstract Ion-selective (anion-selective,cation-selective and bipolar) phenolic coatings were prepared by mixing phenolic varnish with ion ex changers.SO2-4-type anion exchanger resin and Na+-type cation exchange r resin were utilized as anion and cation exchangers respectively.The bipolar co ating consisted of an anion-selective inner layer and a cation-selective outer l ayer.The corrosion compositions of carbon steel depriving of the painted ion-sel ective coatings after exposure in 3%NaCl solution for 30 days were investigated by XPS.The research results of XPS showed that the main compositions in the surf ace layer of carbon steel are Fe2+,OH-,O2- and Cl-under SO2- 4-type anion-selective coating,whereas the main compositions are Fe2+, Fe0,OH-,and O2- under Na+-type cation-selective and SO2-4-ty pe anion-selective / Na+-type cation-selective bipolar coatings.The XPS signal o f Cl-can be inspected obviously on the surface layer of carbon steel with anio n-selective coating,whereas there is no obvious signal in the case of cation-sel ective and bipolar coatings.This indicated that Cl- could migrate from the NaC l solution to the substrate metal when carbon steel covered with anion-selective coating,whereas the migration of Cl- would be blocked in the case of cation-se l ective and bipolar coatings.From these results,it can be concluded that SO2- 4-type anion-selective coating has poor corrosion resistance,Na+-type cati on-selective coating has better corrosion resistance,and SO2-4-type anio n-selective/Na+-type cation-selective bipolar coating has excellent corrosion resistance.
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Received: 07 July 2000
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[1]HammondJS ,etal.ComprehensiveTreatiseofElectrochemistry[M ].eds.White,Bockris,Conway,Yeager.NewYork:PlenumPress,1984,445-457 [2]CastleJE .TheuseofX -rayphotoelectronspectroscopyincorrosionscience[J].SurfaceScience,1977,68:583~602 [3]LarsonDT .Surfaceanalytictechniquesincorrosionscience[J].CorrosionScience,1979,19(10):657~673 [4]AsamiK ,HashimotoK .AnXPSstudyofthesurfacesonFe-CrandFe-Nialloysaftermechanicalpolishing[J].CorrosionScience,1984,24(2):83~97 [5]SatoN .Towardamorefundamentalunderstandingofcorrosionprocesses[J].Corrosion,1989,45(5):354~368 [6]WangZC ,SuFT ,GuZJ.Corrosionandelectrochemicalbehaviorofironcoveredwithbipolarorganiccoatings[J].CorrosionScienceandProtectionTechnique,1994,6(1):1~6(王周成,苏方腾,辜志俊.Fe在双极有机涂层下的腐蚀和电化学行为研究[J].腐蚀科学与防护技术,1994,6(1):1~6) [7]WangZC ,SuFT ,GuZJ.Theeffectofion selectivephenoliccoatingsonelectrochemicalbehaviorofcopperin3%NaClsolu tion[J].JournalofChineseSocietyforCorrosionandProtection,1997,17(2):93~98(王周成,苏方腾,辜志俊等.离子选择性涂层对铜在3%NaCl中电化学行为的影响[J].中国腐蚀与防护学报,1997,17(2):93~98) [8]WangZC ,ZhangYZ ,ZhouSM ,etal.ElectrochemicalandcorrosionbehaviorofA3steelcoveredwithion selectivecoatings[J].JournalofXiamenUniversity(NaturalScience),1997,36(3):388~393(王周成,张瀛洲,周绍民等.A3钢在离子选择性涂层下的腐蚀电化学行为[J].厦门大学学报(自然科学版),1997,36(3):388~393) [9]BrundleCR ,ChuangTJ.Coreandvalencelevelphotoemissionstudiesofironoxidesurfacesandtheoxidationofironsurfacescience[J].SurfaceScience,1977,68:459~468 [10]ClaytonCR ,LuYC .Abipolarmodelofthepassivityofstainlesssteel[J].J.Electrochem.Soc.,1986,133:2465~2473 [11]GraatPC ,SomersMAJ .Simultaneousdeterminationofcompositionandthicknessofthiniron-oxidefilmsfromXPSFe2 pspectra[J].Appl.Surf.Sci.,1996,100/101:36 [12]CorneilleJS ,HeJW ,GoodmanDW .Preparationandcharacterizationofultra-thinironoxidefilmsonaMo(100)[J].Surf.Sci.,1995,338:211~244 [13]SugimotoK ,SawadaY .Theroleofmolybdenumadditionstoausteniticstainlesssteelsintheinhibitionofpittinginacidchlo ridesolutions[J].CorrosionScience,1977,17(5):425~445 [14]AsamiK ,HashimotoK .TheX -rayphotoelectronspectraofseveraloxidesofironandchromium[J].CorrosionScience,1977,17(7):559~570 [15]WagnerCDetal.HandbookofX -RayPhotoelectro-Spectroscopy[M ].NewYork:PerkinElmerCorp.,EdenPrairie,1979,45 [16]BiXM ,CaoCN .TheeffectofpHandchlorideiononcorrosionandelectrochemicalbehaviorofironinacidicsolutions[J].JournalofChineseSocietyforCorrosionandProtection,1983,3(4):199(毕新民,曹楚南.pH值和氯离子对铁在酸性溶液中的腐蚀电化学行为的影响[J].中国腐蚀与防护学报,1983,3(4):199) [17]DongJH ,CaoCN ,LinHC .Theresearchoftheeffectofchlorideoncorrosionmechanismofironindiluteacidicsolutions[J].ActaPhysicoChimicaSinica,1995,11(3):279(董俊华,曹楚南,林海潮.稀酸溶液中氯离子对工业纯铁的腐蚀机理研究[J].物理化学学报,1995,11(3):279) |
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