Kusiyana pakati pa mankhwala a phosphating ndi passivation muzitsulo kuli muzolinga zawo ndi njira zawo.

Phosphating ndi njira yofunika kwambiri yopewera dzimbiri muzinthu zachitsulo.Zolinga zake ndi monga kupereka chitetezo cha dzimbiri pazitsulo zoyambira, kugwira ntchito ngati choyambira musanapente, kupititsa patsogolo kumamatira ndi kukana kwa dzimbiri kwa zigawo zokutira, ndikuchita ngati mafuta opangira zitsulo.Phosphating imatha kugawidwa m'magulu atatu kutengera momwe amagwiritsidwira ntchito: 1) kupaka phosphating, 2) kuzizira kwamafuta a phosphating, ndi 3) kukongoletsa phosphating.Ithanso kugawidwa ndi mtundu wa phosphate wogwiritsidwa ntchito, monga zinc phosphate, zinc-calcium phosphate, iron phosphate, zinc-manganese phosphate, ndi manganese phosphate.Kuphatikiza apo, phosphating imatha kugawidwa ndi kutentha: kutentha kwambiri (pamwamba pa 80 ℃) phosphating, sing'anga kutentha (50-70 ℃) phosphating, kutsika (mozungulira 40 ℃) phosphating, ndi kutentha kwachipinda (10-30 ℃) phosphating.

Komano, kodi passivation imachitika bwanji muzitsulo, ndipo njira yake ndi yotani?Ndikofunika kuzindikira kuti passivation ndizochitika zomwe zimachitika chifukwa cha kuyanjana pakati pa gawo lachitsulo ndi gawo la yankho kapena zochitika zapakati.Kafukufuku wawonetsa momwe ma abrasion amakanika amakhudzira zitsulo zomwe sizikuyenda bwino.Mayesero amasonyeza kuti mosalekeza abrasion wa pamwamba zitsulo zimayambitsa kwambiri zoipa kusintha mphamvu zitsulo, activating zitsulo mu dziko passivated.Izi zikuwonetsa kuti passivation ndi chodabwitsa chomwe chimachitika pamene zitsulo zimakumana ndi sing'anga pansi pazifukwa zina.Electrochemical passivation zimachitika pa anodic polarization, zomwe zimatsogolera kusintha kwa zitsulo zomwe zingatheke komanso kupanga ma oxides achitsulo kapena mchere pa electrode pamwamba, kupanga filimu yopanda kanthu ndikuyambitsa chitsulo.Chemical passivation, Komano, kumakhudza mwachindunji zochita za oxidizing wothandizira monga anaikira HNO3 pa zitsulo, kupanga okusayidi filimu pamwamba, kapena kuwonjezera zitsulo mosavuta passivatable monga Cr ndi Ni.Mu mankhwala passivation, ndende ya anawonjezera oxidizing wothandizila sayenera kugwa pansi pa mtengo wapatali;Apo ayi, sizingapangitse kusuntha ndipo zingayambitse kusungunuka kwachitsulo mofulumira.