Pretreatment inosanganisira manyorerwo akarerutswa maitiro uye otomatiki pretreatment maitiro, iyo yekupedzisira inokamurwa kuita otomatiki kupfapfaidza uye otomatiki dip spraying. Pamberi pehupfu yekuputira, maworkpieces anofanirwa kurapwa pamusoro kuti abvise mafuta uye ngura. Iyi nhanho inoshandisa akasiyana emakemikari, kunyanya anobvisa ngura, degreasers, epamusoro conditioners, uye phosphating agents.
Muchikamu chekutanga kana musangano weiyo coating yekugadzira mutsara, chekutanga kumisa masisitimu anodiwa ekutenga, kutakura, kuchengetedza, uye kushandiswa kweasidhi yakasimba uye alkalis; kupa vashandi zvipfeko zvinodzivirira zvinodiwa; chengetedza midziyo yakachengeteka uye yakavimbika, mabatiro, uye midziyo; uye gadzira matanho ekupindura kwechimbichimbi uye nzira dzekununura kana pakaitika tsaona. Kechipiri, nekuti chikamu che pretreatment chemutsetse wekugadzira coating chinoburitsa imwe huwandu hwemarara gasi uye tsvina yemvura, matanho ekudzivirira kwezvakatipoteredza anofanirwa kusanganisira kupera simba, dhizaini, uye zvigadziriso zvemarara.
Hunhu hwe pretreated workpieces huchasiyana nekuda kwekusiyana kwe pretreatment mhinduro uye coating yekugadzira mutsara maitiro. Kune-zvishandiso zvakagadziriswa zvine mafuta ese uye ngura yabviswa, phosphating kana passivation kurapwa kunowanzoitwa kakawanda mushure mekurapwa kudzivirira kuita ngura zvakare munguva pfupi. Pamberi pekuputira poda, phosphated workpieces inofanira kuomeswa kuti ibvise unyoro hwepamusoro. Pa-batch diki,-kugadzirwa kwechidimbu chimwe chete, kuomeswa nemhepo, kuomeswa nezuva, kana kuomeswa nemhepo. Kugadzira-batch hombe, kugadzira tambo, kudzikira-kuwomeswa kwekushisa kunowanzoitwa pachishandiswa mahovhoni kana kuomesa tunnel.
