Phapang lipakeng tsa kalafo ea phosphating le passivation ka tšepe e ho merero le mekhoa ea tsona.

Phosphating ke mokhoa oa bohlokoa oa ho thibela kutu ka thepa ea tšepe.Lipheo tsa eona li kenyelletsa ho fana ka ts'ireletso ea kutu ho tšepe ea motheo, ho sebetsa e le primer pele ho penta, ho matlafatsa ho khomarela le ho hanyetsa ha kutu ea likarolo tsa ho roala, le ho sebetsa e le lubricant ts'ebetsong ea tšepe.Phosphating e ka aroloa ka mefuta e meraro ho latela ts'ebeliso ea eona: 1) phosphating ea ho roala, 2) phosphating e batang ea extrusion, le 3) phosphating e khabisitsoeng.E ka boela ea aroloa ka mofuta oa phosphate e sebelisoang, joalo ka zinki phosphate, zinc-calcium phosphate, iron phosphate, zinc-manganese phosphate le manganese phosphate.Ho feta moo, phosphating e ka aroloa ka mocheso: mocheso o phahameng (ka holimo ho 80 ℃) phosphating, mocheso o mahareng (50-70 ℃) phosphating, mocheso o tlase (hoo e ka bang 40 ℃) phosphating, le mocheso oa kamore (10-30 ℃) phosphating.

Ka lehlakoreng le leng, passivation e etsahala joang litšepe, 'me mochine oa eona ke ofe?Ke habohlokoa ho hlokomela hore passivation ke ketsahalo e bakoang ke ho sebelisana pakeng tsa karolo ea tšepe le karolo ea tharollo kapa ka liketsahalo tse fapaneng.Patlisiso e bonts'itse phello ea ho khoasoa ha mochini holim'a litšepe sebakeng se sa sebetseng.Liteko li bontša hore ho phunya ho tsoelang pele ha bokaholimo ba tšepe ho baka phetoho e mpe ho matla a tšepe, ho etsa hore tšepe e be boemong ba passivated.Sena se bontša hore passivation ke ketsahalo e fapaneng e hlahang ha litšepe li kopana le seaplane tlas'a maemo a itseng.Electrochemical passivation e etsahala nakong ea polarization ea anodic, e lebisang ho liphetoho tse ka khonehang tsa tšepe le ho thehoa ha li-oxide tsa tšepe kapa letsoai holim'a eleketrode, ho etsa filimi e sa sebetseng le ho etsa hore ho be le tšepe ea tšepe.Ka lehlakoreng le leng, passivation ea lik'hemik'hale e kenyelletsa ts'ebetso e tobileng ea li-oxidizing agents tse kang tse tebileng tsa HNO3 holim'a tšepe, ho etsa filimi ea oxide holim'a metsi, kapa ho eketsoa ha litšepe tse khonang ho feta tse kang Cr le Ni.Ka passivation ea lik'hemik'hale, mahloriso a moemeli oa oxidizing a ekelitsoeng ha aa lokela ho oela ka tlase ho bohlokoa ba bohlokoa;ho seng joalo, e ka 'na ea se ke ea baka passivation' me e ka lebisa ho qhibiliha ha tšepe ka potlako.