1.How rau kev tswj hwm cov txheej txheem tseeb?
Kub - dip galvanizing:
Ua kom zoo "Zinc Da dej kub + rub lub sijhawm rub tawm - REO Tinkse High Trowsatatures, thaum tsis tshua muaj cua sov tuaj yeem ua rau tsis tau zinc nplaum. Los ntawm kev tswj qhov kub (piv txwv li, 440 {{{}} 460 surchently dhau los thaum muaj kev sib tw tsis sib xws (piv txwv li, lub thickness txawv ntawm a Z60 Txheej tuaj yeem raug txo los ntawm ± 20% rau ± 10%).
Kho cov Dinc Da dej muaj zog zinc (ntxiv cov kab alloying cov ntsiab lus): {{}} Hluav Taws Xob:
Kev ua kom zoo dua tam sim no kev tsim qauv thiab kev hloov kho hluav taws xob (piv txwv li, kom muaj cov kab ke tsis zoo ( 5 {- 10 hlwb 10, uas tuaj yeem txo mus rau 1-3 lub hlwb / mM² tom qab ua kom zoo dua). Ntom, tsis muaj-ntxeem tau, nyias cov nyias nyias (piv txwv li, z50) tuaj yeem ua tiav corrosion tiv thaiv piv rau cov ntawm cov pa, piv txwv li, z80).
2.Yog li cas rau kev ntxiv dag zog substrate sab actreatment?
Ua kom tiav tshem tawm cov nplai thiab roj: ib qho kev sib xyaw ua ke "siv + cov txheej txheem picking) yog siv los tshem tawm oxide cov yeeb yaj kiab (xws li fe₃o₄) thiab roj los ntawm substrate nto. Qhov no tiv thaiv kev tsim ntawm tus "Oxide interlayer" ntawm zinc txheej thiab lub substrate thiab substrate, uas tuaj yeem ua rau tsis zoo adhesion. (Lub zinc txheej nrog cov nplaum tsis zoo yog nquag mus rau kev hle khoom, yuav tsum muaj cov tuab ntxiv kom muab "kev tiv thaiv kev them nyiaj").
Kev tswj substrate do roughness: ntau dhau nkaws cov ntawv txias (tuab siv zinc txheej) muaj peev xwm tsis siv zinc, tuab zinc txheej hauv peaks). Tshaj tawm -}-} {} {}}}}}}}}} Daim ntaub qhwv Substrate thiab ua kom cov khoom siv zinc zinc. (Rau cov nyhuv tiv thaiv tib yam, qhov hnyav ntawm lub cev ntaj ntsug tuaj yeem txo los ntawm 10-15%.)
3.Qhov yog qhov qis - tus nqi txhais tau tias "kev tiv thaiv kev tiv thaiv"?
Chromate Passivation (ib txwm muaj txheej txheem, ib puag ncig phooj ywg): zaj yeeb yaj kiab passivation (muaj cr³⁺ / cr a) blocks corrosive media. Tsis tas li ntawd, thaum cov txheej corrodes, cov zaj yeeb yaj kiab passivation "tus kheej - kev hloov pauv" (txhaws cov zinc txheej). Cov tshuaj ntsev ua paug tsis kam lees ntawm Z50 Zinc Plating Ua ke nrog chromate passivation tuaj yeem nce los ntawm 100 teev rau ntau dua 300 teev.
Chromium - Pub dawb passivation (ib puag ncig kev hloov pauv xws li silane, sib sau ua cov kab mob demane {}}} inorganic hybrid zaj duab xis. Lub corrosion tsis kam ntawm Z60 Zinc Plating ua ke nrog cov pob zeb passivation ze ntawm z1 unpassivated z100 zinc txheej, tsis muaj qee cov hlau uas tsis muaj hlau.
4.What yog cov hau kev los hloov rau ntev-} ntu sab nraum zoov lossis ib puag ncig kev ruaj khov?
Phosphaating + Paus duab: cov yeeb yaj kiab phosphate (2-5μm tuab) ua ib "thauj tog rau nkoj" ntawm zinc nto, txhim kho pleev xim adhesion. Lub corrosion resistance ntawm z60 galvanizing + phosphate txheej {}} epvanizing cais ua ib txheej ua kom zoo li "kev coj ua" thaub qab).
Xim -} Coated steel (galvanized steel (xws li}}}}}}}}}}} Cov txheej zinc zinc tsuas yog xav tau Z50-z80 (cov xim sib deev-coated steel zinc zinc cov txheej feem ntau yog z100 lossis siab dua). Qhov no "cov xim txheej ua ntej tiv thaiv + zinc txheej raws li kev tiv thaiv kev fij tau" muab 15-20 xyoo ntawm sab nrauv phab ntsa vaj huam sib luag thiab sab nraum zoov billboards).
5.Nej sab hauv tsev qis - corrosion scenarios, yuav ua li cas txo cov xim phaus + yooj yim passivation?
Cov Ntawv Thov: Cov Khoom Siv Sab Hauv (xws li lub tub yees backs thiab tshuab ntxhua khaub ncaws (cov khoom siv ua haujlwm), thiab ib puag ncig hauv tsev (qhuav).
Kev daws qhov hnyav txo cov tshuaj: qhov teeb meem hnyav tuaj yeem txo los ntawm cov pa z80 5}} Z100 rau Z40-Z60, ua ke nrog Silane Passivation. Nyob rau hauv ib puag ncig sab hauv tsev, ib qho zinc nyias nyias ua ke nrog cov plaub caug uas muaj xeb muaj peev xwm muab lub neej muaj xeb muaj 5-10 xyoo (deb tshaj cov khoom lag luam lub neej). Tsis tas li ntawd, cov nyias txheej nyias yog qhov tsim nyog rau cov txheej txheem sib sib zog nqus hauv cov khoom siv (txo cov txheej tawg thaum khoov / stamping).