A Technological Design Based On Cathodic Electrophoresis Coating Of Motor-cycle Frame

The electroporesis coating Process is a new coating technology Which non-pollubotemits. The process can not only overcome the ruSting Problem of pedial motor frameresulting from adoPting air or electric static sPraying process, but also increase theefficiency of coating utiliZation and reduce pollutan disposal. Thus, both auomobileinduStry at home and abroed and oversea motorcycle induStry are the first to utlize theprocess in industrialiZation volume-produce. WAn domestic motorcycle trades joiningWTO, it is necessary to strengthen competition ability for these enterprise. The researchand development of the motorcycle electroPhoresis coating process according to ournational conditions have great Practical significance.In order to replace acidic cleansing and removing rust process, the POlishing-pillcleaning oPeration is developed in this paPer in view of environmelltal protection. At thesame time, the corresponding relationships of technological parameters, such as originalStatC polishing-pill efficiency of work, polishing-pill at and polishing-pill width, are alsodiscussed here.According to the vieWPoint of JaPanese scholap the "P fatio" value can be used tOevaluate phosPhatizing film's quaity before electroPhOresis coating. Thus, we discuss thebehavior of electrOphoresis coating process for low-content ainc, normal-colltCnt zinc anddegreasing imor plate in both conductive solution of imitating electrOphoresis paint andreal eleCtrOphoresis pain. The result is shown that forming lowcontent zincphosPhatizing film is the basic requirement of cathodic electrOphoresis coating substfate,because dissolving of phosphatizing film dose not pollute the electrophoresis coatingsolution in this condition.The pefformance of cathOdic electroPhoresis coating film layer is evalUaed bydifferen methods, maiuly involving Precipitation ProPeI'ty air twing mark propertyelectrophoresis permeability e1ectric breakdown tension, ani-pollution ability ofphosPhatizing sollltion, NSS and anificially accelerated aging-eXPerimellt. Furthermore,in the resPect of the design of electroporesis coating and auxiliary system, this paPergives some views about the technology process of electrophoresis vessel, circular syStemof sollltion in vessel, ultra-filt fation system, power system, cleaning system afterelectfophoresis system, RO pure water producing system and heating stove strucfore. Atthe mean time, the effects of differeni technological pararneters on the electrophoresislI=coating, such as pH value of solution in vessel, conductivity temPeramre, voltage, timeand film thickness, are stUdied. And the optimal technologic parameters are obtained.In addition, the feasibility fOr wasteWaer disposal is discussed. A solution is developedusing shwting wasteWater of product line, chemical coagulation and precipitation, thetreated Wnde Water can reach the standard of disposal.According tO both the results of experimenta research and the experience of othercounries for reference, the electrOphoresis coating process is developed. At presellt, theprocess is adopted in JiaLin factory and ani-cormsion ability of motor frame makes greatforrovement.