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The choice of copper clad steel plating process

The choice of copper clad steel plating process

Thespecialnatureofthewireprocessingindustrymakesthecopperplatingprocessdifferentfromconventionalsteelparts.Therefore,howtochooseacopperplatingprocesssuitableforwireprocessingisaveryimportantissue. Thechoiceoftheplatingprocessisusuallybasedontherequirementsoftheplatingproductitself.Thatis,theproductisfirstprocessedandthenelectroplated.Suchasthickness,brightness,hardnessanddispersibility.Therearealsorequirementsforcurrentefficiencyanddepositionspeed.Thenlookatthepre-plated,intermediateandsurfacecoatingsthatarerequiredforcopperplating. Thecharacteristicofwireprocessingandplatingisthattheprocessingofthewireandtheplatingprocessaresometimescarriedoutsimultaneously.Thatis,somearefirstpulledandthenplated,andsomearefirstplatedandthenpulled.Eventheplatingofthefinishedwireiscarriedoutunderthetractionofthetake-upmachine.Inadditiontotherequirementsofthecoatingaccordingtothedifferentusesofthewire,theselectedprocessshouldalsoconsidertheadaptabilityoftheplatingworkertothewirewalkingspeed,thenumberoftractionheads,andthelengthoftheprocessingline. FortheCO2gasshieldedweldingwire,sincetheamountofcopperadhesionontheweldingwireisstrictlylimited,forexample,thecoppercontentperunitvolumeshouldbewithin0.52(massfraction)ofthesolder,whichisanextremelythincoating,andthechemicalimmersionmethodisselected.Displacementofcoppercanmeettherequirements,butduetothetraditionalmethodusedinChinatoreplacecopperplating,itsbondingstrengthandcoatingcolorcannotmeettheproductrequirements.Andinpractice,theprocessoffirstimmersionplatinganddrawingisperformed,sothatthecopperlayerisstretchedandthinnedduringdrawingtomeetproductrequirements.Thismethodoftenoccurswhenthecoatingpeelsoffandthebottomisexposed.Therefore,choosingacopperplatingprocesswithgoodbondingandductilityisveryimportantforgasshieldedweldingwire. Beforetheemergenceofanewprocesscapableofsuccessfullyperformingcopperelectrolesscopperplatingonafinishedwire,itisstillonlypossibletoadoptaprocessoffirstpullingtheintermediatewirediameterandthendrawingthecopperintoafinishedproduct.Suitableforthisprocessshouldbecyanidecopperplatingormattacidcopperplating.Becausecyanideistootoxic,ithasrarelybeenusedinthemetallurgicalwireprocessingindustry.Atpresent,themorepopularmethodisstillchemicalcopperimmersioncopperandthenthickenedcopperplatingandthenpulled.Thethickcopperplatingusedisacidcopperplatingorpyrophosphatecopperplating.Intheflatwireprocessingindustry,chemicalcopperplatingisalsoused. Conventionalreplacementcopperplatingusesaprocessofcoppersulfateplussulfuricacid.Onlyinaveryshortperiodoftimecanbereplacedbyaverythincoating,whenthecopperplatingisthickened,thebondingforceisnotstrong.Ifthetimeofimmersioninsuchchemicaldisplacementplatingistoolong,notonlywillthethicknessoftheplatinglayerbeincreased,butalsotheplatinglayerwillbecomelooseandporous,theironmatrixwillalsocorrode,andthestrengthofthewirewillbegreatlyreduced.Theimprovedmethodistoaddanadditivehavingasurfaceretardingeffecttothereplacementcopperplatingsolution,sothatthereplacementprocessiscarriedoutinanorderlymanner.Theidealadditivealsohasacertainbrighteningeffect. Forwireproductsthatrequireacertainthicknessorevenathickercoating,caremustbetakentoreplacetheplatingwithareplacementcoating.Atleastforthethickeningofcopper,thereliableprocessshouldbepre-platedbyelectrochemicalmethods,atleastuntilthereisnoreliableprimerprocessforthickcopperplating.Thematurepre-platingprocessiscyanidecopper-platednickelandhighP-ratiopyrophosphatecopper.Weighingallkindsofadvantagesanddisadvantages,inthewiredrawingindustry,itisbettertousenickelplatingasthepre-platingbase.Forthickcopperplating,acidsulfatecopperplatingcanbeused.Thisisbecause,afterprocessadjustment,acidcopperplatingcanmeettherequirementsofhigh-speedplating.Thecurrentdensitycanreach30to50A/dm2,whichgreatlyincreasesthedepositionspeed.Incontrast,cyanidecopperplatingisnotsuitableforenvironmentalpollutionproblems,andpyrophosphatecopperplatingisnotonlycostlybutalsonotsuitableforoperationathighcurrentsduetoitscomplexcomposition.Testshaveshownthatinhigh-speedelectroplatinginacidcopperplating,whenthecurrentdensityisincreased,thedepositionrateoftheplatinglayerisalsoincreasedatthesametime,andtheapproximaterelationshipisshowninTable1.
release time : 2019-08-14 Click : 8
China's copper industry accelerates the transformation of blueprints into reality

China's copper industry accelerates the transformation of blueprints into reality

TheChinaCopperIndustry2019Mid-YearWorkConferencewasheldatChinalcoBuilding.PartymemberandchairmanofChinalcoGroupGeHonglin,memberofthepartygroupanddeputygeneralmanagerofChinalcoGroup,LiuJianping,secretaryoftheChinaCopperIndustryPartyCommittee,andLiMingqiu,deputydirectoroftheYunnanProvincialState-ownedAssetsSupervisionandAdministrationCommission,attendedthemeetinganddeliveredspeeches.GeHonglinpointedoutthatinthefirsthalfoftheyear,China'scopperindustry'snetprofitrankedfirstinallsectors,whichcontributedpositivelytotheGroup'srecordhighperformance,markingthereorganizationofChinaCopperandYunyetoachieveawin-wingoalandachievedbetterthanexpected.Theintegrationeffectachievedbetterthanexpectedbusinessperformanceandachievedbetterthanexpectedpartybuildingwork.ThisfullyprovesthatthestrategiccooperationbetweenChinalcoandtheYunnanProvincialPartyCommitteeandthegovernmentisasuccess.ItfullyprovesthatthenewteamofChina'scopperindustryisdaringtofighthardandwinthebattle.TheemployeesoftheChinaCopperCorpsaretalkingaboutpolitics,takingcareoftheoverallsituation,anddaretotakeresponsibility.Itisworthyofthetrustandcommitmentofthepartygroup.ThedevelopmentofthenewChinacopperispromising. GeHonglindemandedthat,inthenextstep,XinzhongCoppershouldacceleratethetransformationoftheblueprintintoreality.First,thebusinessresultsshouldbebetter.Wemustbegoodatthetopleaders,goallouttodealwithvariousriskchallenges,doeverythingpossibletomobilizetheenthusiasmandcreativityofallemployees,furtherreleasethedividendsofstrategicrestructuringanddeepeningreforms,outperformthemarket,outperformthetrend,outperformpeers,andoutperformourselvestoensureExceedingthegoalsandtasksoftheyear.Second,reformandinnovationshouldbefaster.Itisnecessarytocloselyfocusontheoveralltoneofreform,innovation,transformationandupgrading,continuetopromotesupply-sidestructuralreforms,accelerateassetintegration,anddothetwocorecorebusinessesofcopper,leadandzinc,optimizetheupstreamanddownstreamindustrialchains,andinnovateanddevelopcoordinatedsupportingindustries.Inaccordancewiththestrategiclayoutof“4+4+4”,wewillcontinuetooptimizetheindustriallayoutandimplementtheoverseascopperstrategy.Third,safetyandenvironmentalprotectionshouldbestricter.Wemustadheretotheproblem-oriented,outofhigh-handedness,usepracticalmeasures,andmoveforward,andresolutelywinthe"threemajorbattles"andearnestlyestablishtheimageofresponsiblecentralenterprises. GeHonglinemphasizedthatXinzhongCoppershouldleadhigh-qualitydevelopmentwithhigh-qualitypartybuilding.First,thethemeeducationmusthaveneweffects.Itisnecessarytocarryoutthestudythroughout,in-depthinvestigationandresearch,findtheproblem,findtherootcause,andclarifythedirectionofeffortsandimprovementmeasures.Itisnecessarytoprescribetherightmedicine,improvethesystemandmechanism,andblockmanagementloopholes.Thetopleadersofpartyandgovernmentatalllevelsmusttaketheleadinlearning,taketheleadininvestigationandresearch,taketheleadinreviewingissues,taketheleadinrectificationandimplementation,andtesttheeffectivenessofthethemeeducationwithexcellentbusinessperformance.Second,thepartymanagementcadresmusthavenewmeasures.Wemustresolutelyimplementtheparty'sorganizationallineintheneweraandimplementthestandardsofgoodcadresintheneweraofloyaltyandcleanliness.Adheretothestrictmanagementoflove,andimplementthestrictmanagementofcadrestotheentireprocessofcadreteambuilding.Third,wemusthaveanewroleinstrictlyadministeringtheparty.Wemustresolutelydoagoodjobofpatrollingandrectifyingthe"secondhalfofthearticle",strengthentheimplementationofrectificationandtheuseofresults,andpromotereformandpromotedevelopment.Itisnecessarytopromotetheconstructionofasystemthatcannotbecorrupted,nottorot,andnottorot,totightenthesystem"cage",letthesystem"longteeth",andletthediscipline"charge".Itisnecessarytostrengthentheworkstyleconstruction,paycloseattentiontotheimplementationoftheeightcentralregulations,andcontinuetochangethe"fourwinds"tochangestyle.Wemuststartanewjourneyofbuildingaworld-classcopper,leadandzincenterprisewithglobalcompetitivenesswiththe"fourbetterandonebetter"style. LiuJianpingpointedoutthatChina'scopperindustryisinthecriticalperiodandopportunityperiodofrestructuring,integration,transformationandupgrading,andacceleratingdevelopment.ItshouldersthehighhopesofthegrouppartygroupandtheYunnanprovincialpartycommitteeandtheprovincialgovernment,andmusttakeadvantageofthesituation,takeadvantageofthetrend,andtakeadvantageofthesituationtoopenup.Anewjourneyofhighqualitydevelopment.First,wemustkeepinmindtheinitialmission.Adheretothegoalofcreating"twoplatforms,onebase,threehundredbillionindustries",toachieveablueprintintheend,oneaftertheother,andwriteanewchapterofhighqualitydevelopment.Thesecondistofaceuptotheadvantagesanddisadvantages.Wemustcoordinatethelayout,turndisadvantagesintoadvantages,andpromotequalitychangeandefficiencychangewithdynamicchangetoachievehigh-qualitydevelopment.Thethirdistostrengthenthedirectionofthegoal.Wewilladheretotheprincipleofstrictlyadministeringtheparty,comprehensivelydeepeningreform,comprehensiveandprecise
release time : 2019-08-14 Click : 5
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