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67(),(,411201)[](CTMAB),,Cr()CTMABpHCr(),Cr(),Cr(),pH31051030min10g/L,Cr()35mg/L,98.0%,Cr()0.50mg/L,[];Cr();;[]X781.1[]B[]1001-1560(2006)02-0067-03[]200509210CrO2-4Cr2O2-7,[1,2],,,(CTMAB)(),11.1,,80%,9,55%85%,1();();();():,Cr()3050mg/L,pH591%SiO2Al2O3Fe2O3MgOCaONa2OK2OH2OMnOTiO60.09011.2201.4603.0203.2202.5601.1805.3100.0450.1509.3607230G,PHS23C,HY221.2:10h,3,,180,:3[3],250mL60,,,(CTMAB),10min24h,2;40,1201.3150mL250mL,1mol/LH2SO41mol/LNaOH68pH;,(120r/min),,PHS23CpH;Cr()[4],Cr()22.1CTMAB,Cr()CTMAB(2)2,CTMAB,Cr(),,CTMAB,,CTMAB[5],5%CTMAB2CTMAB%CTMAB3.03.54.04.55.05.56.07.0Cr()78.280.590.495.998.798.899.099.42.2Cr()(1)pH150mL35mg/LCr()pH,1.5g,120r/min,pHCr()11,pHpH=4,Cr(),98.7%pH=3.05.0,,Cr()97.0%,pH3.05.01pHCr()(2)150mL35mg/LCr()pH=3.05.0,1.5g,120r/min,Cr()3,,Cr(),Cr(),30min,30min3Cr()/min10203060120150180Cr()/%73.691.298.998.998.998.998.9(3)150mL35mg/LCr()pH=3.05.0,,30min,Cr(),44,Cr(),1.5g,Cr()98.0%,Cr()GB8978-1996();1.5g,Cr(),,1.5g,1L10.0g4Cr()/g0.30.60.91.21.51.82.1Cr()/%74.580.493.896.298.698.798.9,35mg/LCr(),Cr()0.5mg/L,GB8978-19962.3Cr()pH()69,1.5g150mLCr(),5,;,Cr(),CTMAB5Cr()/(mgL-1)/(mgL-1)/%15.0045.000.092.5799.494.315.0045.000.177.7998.982.72.4Cr()Cr(),Cr(),()(),2z1,,CrO2-4,Cr2O2-7,,Cr()CTMAB,CTMAB,[6],,,,Cr(),,CTMAB,,,,,CrO2-4Cr2O2-7,Cr(),Cr()3(1)Cr(),,(2)Cr(),Cr()(3)Cr():pH3.05.0,30min,10g/L35mg/LCr(),98.0%[][1],.[J].,2003,36(3):5354.[2].[J].,2003,35(3):3739.[3].[J].,1998,6(3):5361.[4].[M].:,1983.[5],.[J].,1994,14(5):346349.[6],.[J].,1998,14(4):79.[:](66),,3,,,,,,,,,,,,,0.1mol/LK2SO4,30min,,[:]()ji1,ZHUCheng2fei1(1.CollegeofMaterialsScienceandEngi2neering,NanjingUniversityofTechnology,Nanjing210009,Chi2na;2.DepartmentofChemicalEngineering,XiangfanCollege,Xiangfan441000,China)CailiaoBaohu2006,39(02),5962(Ch).Electrochemicalimpedancespectroscopywasusedtoin2vestigatetheinhibitiveactionofmolybdate2basedcombinedinhib2itortothedrillpipemadeofG105steelinsaltwaterdrillingfluid.Theoptimizedformulationofthecombinedinhibitorwasdeter2mined,whileitseffectivenessincorrosion2inhibitionofthedrillingpipewasverifiedmakinguseofdynamicsimulationtest(weightlossmethod)inlab.Resultsshowedthatthecombinedinhibitorcomposedofmolybdate,Si2containingcompound,andamineBatamassfractionof1z4z1wassuperiorintermsoftheperform2ance2to2costratioandshowedgoodinhibitiveeffecttothedrillingpipe.Inparticular,thecombinedinhibitorhadaninhibitiveeffi2ciencyasmuchas9510%,whichwasmuchhigherthanthatofsingle2componentcorrosioninhibitors.Keywords:molybdate2basedcombinedinhibitor;corrosioninhi2bition;drillingpipe;G105steel;saltwaterdrillingfluid;EISCorrosionandProtectionofFacilitiesMadeofSteelforUr2banSewage2DisposalPlantMAJian2qi,HUANGZhe2long,LIYun2de,CAOMin2rong(Bei2jingInstituteofAeronauticalMaterial,Beijing100095,China)CailiaoBaohu2006,39(02),6364(Ch).Startingfromthecor2rosionpreventionofthefacilitiesmadeofsteelforurbansewage2disposalplant,desiredanti2corrosionsystemswerescreenedwithrespecttotherelevantcorrosivemediumsandconditions.Theper2formanceoftheselectedcoatingsystemswasexperimentallyveri2fied,whilesomeoftheselectedcostingsystemswerebroughtintoengineeringpractice.Astheresults,itwassuggestedtouseacoatingsystemcomposedofzinc2richepoxyprimer,micaceousfer2ricoxideepoxyintermediate,andmodifiedepoxytopcoatfortheimmersedfacilities,whichshowedgoodcorrosion2preventioneffect.Differentfromtheabove,thecoatingsystemcomprisingzinc2richepoxyprimer,micaceousferricoxideepoxyintermedi2ate,andacrylicpolyurethanetopcoatshowedgoodprotectiontothefacilitiessubjecttoalternatingdry2and2wetworkingcondi2tions.Ingeneral,itwasanticipatedthattheservicelifeforthetwotypesofcoatingsystemscouldbeaslongas8years.Keywords:corrosionandprotection;steelstructure;sewage2dis2posalfacilities;coatingsystem;microbialcorrosionProcessModificationforSilverElectroplatingofPartsMadeofBerylliumBronzeWENSi2xiong(FormerXinghongMechanicalFactory,GuizhouA2viationIndustryGroupCorporation,Guiyang550205,China)Cail2iaoBaohu2006,39(02),6566(Ch).Silverelectroplatingofberylliumbronzewiththiosulfatewasusedtoreplaceconventionaltoxicsilverplatingwithcyanideinaccordanceofthecharacteris2ticsoftheberylliumbronze.Thusanefficientpretreatmentprocesswasintroducedtofacilitatethesilverelectroplatingofthepartsmadeofberylliumbronzewithathiosulfatebath.Moreover,ana2nalysiswasmadeonthecausesleadingtotarnishingoftheelec2troplatedsilver,andtherelevantantitarnishingstrategiesweresuggestedaswell.Keywords:cyanide2freesilverplating;berylliumbronze;passiva2tion;pretreatment;antitarnishingStudyofAdsorptionofCr()2ContainingWastewaterbyOrganobentoniteYANGMing2ping,FUYong2jian(SchoolofChemistryandChemi2calEngineering,HunanUniversityofScience&Technology,Xiangtan411201,China)CailiaoBaohu2006,39(02),6769(Ch).Crudebentonitewasorganicallymodifiedusinghexadecyl2tri2methylammoniumbromide(CTMAB).TheresultingmodifiedorganobentonitewasusedtoadsorbCr()2containingwastewaterunderstaticconditions.TheeffectsoftheconcentrationofCT2MAB,organobentonitedosage,pHvalueofwastewater,andstirringtimeontheremovalrateofCr()ionswerestudied,whiletheopti