Mhinduro dzematambudziko ehupfu hwekuputira pamusoro pekupisa dip galvanizing

1. Kurapwa kusina kukwana:

• Polyester upfu hwekuputira hupfu ndiyo thermosetting resins iyo inoyambuka-inobatanidza kune yavo yekupedzisira organic fomu nekuchengetwa patembiricha (kazhinji 180 o C), kwemaminitsi angangoita gumi. Kurapa oveni dzakagadzirirwa kupa nguva ino pakusanganiswa kwekushisa. Nezvinopisa dip galvanized zvinhu, nehuremu hwechikamu chechikamu, zvinodikanwa kuve nechokwadi kuti nguva yestoving yakakwana inobvumidzwa kusangana neanorapa. Pre-heating yebasa rinorema richabatsira kukurumidza kurapa muvheni yekurapa.

2.Poor adhesion:

• Nhanho yekupedzisira mukupisa dip galvanizing process inosanganisira kudzimwa kwemvura yebasa, kazhinji mune isina simba sodium dichromate solution. Iyi nzira inotonhorera basa kuitira kuti rigone kubatwa uye kupfuudza pamusoro peiyo galvanized coating kudzivirira kutanga oxidation yepasi. Kuvepo kwefirimu rinopfuura pamusoro peiyo galvanized coating kunozokanganisa zinc phosphate kana iron phosphate pretreatment, uye kazhinji, izvi zvinokonzeresa kurapa kusati kwashanda. Izvo zvakakosha kuti inopisa dip galvanized zvinhu zvirege kudzimwa mushure mekuputira. Izvi zvinovimbisa kuti iyo zinc pamusoro iri mune yakanyanya reactive mamiriro ekugamuchira pretreatment inoshandiswa muhupfu hwekuputira maitiro.

3.Pinholing:

• Pinholing inokonzerwa nekuumbwa kwemabhuru madiki egasi mupolyester coating panguva yekupisa / kupora kutenderera. Mafuru aya anoumba makorokoza madiki pamusoro uye haataridzike.Chikonzero chikuru chekuputira pini chinoita sechokuti zvidimbu zvidimbu zvepolyester resin zvakasangana nerata resimbi hazvisanganise panguva imwe chete nezviri pamusoro pehupfu hwepolyester. firimu, nekuda kwehuremu hwe galvanized steel , uye nguva yakatorwa kuti isvike pakusanganiswa kwekushisa.
• Kunyanya kugadzirwa resin ane 'degassing' agents akagadzirwa kuti aderedze dambudziko iri nekunonoka kutanga kwekusanganiswa kwehupfu. Pre-kupisa basa muovheni isati yatanga kupisa pamberi pehupfu inobvumira zvikamu zvinorema zvinopisa zvinopisa kuti zvive upfu uye kugadzirisa dambudziko repini holing kana richishandiswa pamwe chete ne 'degassing' mamakisi epolyester poda coating.