铝合金等离子体电解着色工艺的.研究 (1)

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1、铝合金等离子体电解着色工艺的研究ThefactorsthatinfluencedthecoloringeffectsofPECOwereanalyzed.UsedThebasicelectrolyteandpotassiumpermanganatewereusedastheexperimentalelectrolyte，then，theorthogonddesignsetandanalysisofextremedeviationweremadetothestartingvoltage，oxidatio

2、ntime，dutyratioandfrequencyofpulsepowersupplyonPECOoxidationfilms，andfinallythebestcombinationforeachfactorsweregot:thestartingvoltagewas210V，oxidationtimewas15min，dutyratiowas15%，frequencywas1500Hz.Carriedoutintheabove-mentionedconditions，thecoloringef

3、fectwillbethebest.ThenegativepulsewasincreasedinordertooptimizePECOtechnology.theparametersofnegativedelaytime，voltageamplitudeandpulsewidthwaschangedtoanalyzetheeffectsofnegativeonPECOtechnology.Studyshowedthatincreasingnegativepulsecanstoplongandlarge

4、micro-discharge，makingthecontroloftechnologyandthesmoothnessofthecoloredoxidationfilmsbetter;Itisdiscoveredthatthedelay-timeofnegativepulseinfluencedthecolormostgreatlyaftertheanalysisoftheeffectsofnegativeparametersonthefilmcolors;whenthedelaytimeincre

5、asedgradually，especiallywhenthetimewasabove13µs，thecolorofoxidationfilmsincreasedcorrespondingly.AccordingtoPEOequivalentcircuitmodel，Thesystemequationwerechangebyanalyzingtheeffectsofconstantpressurecontrolandnegativepulse.Itprovidedgoodreferencesforth

6、ePECO’spowerfurtherimprovementanditspracticaluse.Afterthefunctionaltestoftheappearance，wearresistance，bingforce，corrosionresistance，resistancetolightforcoloredlayers，itdiscussedthecoloringmechanismofPECOtechnology，TheformofPECOoxidationfilmwasduetotheun

7、evendepositionofanioncondensedfilmonanodeorelectrolyteinterface，andtheinterfacethemo-physicsandchemistrychangeonthedepositionlayerbytheeffectofheavycurrentanduppervoltage.Theelectrolyte’smaincomponentwouldbetheconductintheprocessofelectrolyticcoloringan

8、dwasnotconsumed;themetal-saltaddedduringtheelectrolysisreactedwithoxygenorhydrogeninelectrolyteandresultedinmetal-saltdepositingorsinteringonthefilm，andfinallymadethefilmcolored.Insummary，PECOcanovercomethedisadvantagesofanodeoxi