1.Vim li cas ho tsis pom zoo?
Nruam Immersion thiab Splashing:
Cov txheej txheem txhawb nqa theem yuav raug submerged nyob rau hauv dej, tsis tu ncua los yog rau ncua sij hawm, thiab raug cov dej txaws los ntawm nthwv dej thiab kev ua yeeb yam.
Qhov no ua rau cov zinc txheej nyob rau hauv tas li kev sib cuag nrog oxygen- cov dej nplua nuj, ua kom nws cov depletion. Thaum cov zinc txheej tau siv tag nrho, cov hlau hauv qab yuav corrode sai heev.
Electrochemical Corrosion (Critical Risk):
Yog tias cov hlau sib txawv ntawm cov theem (xws li galvanized steel thav duab nrog stainless hlau screws, aluminium handrails, los yog underwater teeb pom kev zoo) yog nyob rau hauv kev sib cuag ncaj qha thiab immersed nyob rau hauv ib tug electrolyte (dej), galvanic cell yuav tsim.
Nyob rau hauv ib puag ncig no, galvanized txheej yuav corrode txawv txav sai, ua rau lub neej luv dua li qhov xav tau.
Mechanical Damage:
Thaum lub sij hawm sib dhos, disassembly, kev thauj mus los, thiab kev siv, cov txheej txheej galvanized tau yooj yim khawb thiab puas los ntawm kev cuam tshuam.
Cov ntsiab lus ntawm kev puas tsuaj no dhau los ua cov ntsiab lus pib rau corrosion, ua rau xeb nkag mus rau sab hauv txawm tias cov zinc txheej nyob ib puag ncig tseem tsis zoo.
2.Yog tias peb hais kom siv nws, yuav tsum ntsuas dab tsi?
Xaiv cov khoom zoo:
Kub-dip galvanized coils / cov khoom siv yuav tsum tau siv, tsis yog electro-galvanized coils nrog cov txheej zinc thinner. Kub-dip galvanizing muab cov zinc txheej tuab (feem ntau ntau dua lossis sib npaug li 85µm), muab kev tiv thaiv ntev dua.
Yuav tsum muaj zinc txheej hnyav dua (piv txwv li, Ntau dua lossis sib npaug li 275 g / m²).
Nruj Ncej -Kev Tiv Thaiv Kev Ua Haujlwm:
Txhua qhov kev txiav, drilled qhov, thiab welds yuav tsum tau kho tam sim ntawd nrog kev tiv thaiv kev tiv thaiv - kev ntsuas corrosion. Standard xyaum yog:
Sib tov thiab ntxuav qhov chaw welded.
Siv zinc-nplua nuj primer nrog cov zinc hmoov cov ntsiab lus siab txaus los simulate "cathodic tiv thaiv" nyhuv ntawm galvanizing.
Siv lub siab -kev ua tau zoo nruab nrab thiab cov coat topcoat (xws li, epoxy lossis polyurethane xim).
Tus Qauv Tsim:
Zam cov cheeb tsam uas muaj dej tsub zuj zuj thaum lub sij hawm tsim qauv. Cov yeeb nkab kawg yuav tsum tau muab kaw nrog lub hau kawg kom tiv thaiv kom tsis txhob ya raws thiab tom qab corrosion ntawm sab hauv tawm.
Thaum txuas rau lwm yam hlau (xws li, stainless hlau, aluminium), insulating gaskets los yog lub tes tsho yuav tsum tau siv los tiv thaiv galvanic corrosion.
3.Dab tsi yog qhov zoo thiab qhov tsis zoo ntawm kev siv aluminium alloys hloov?
Qhov zoo: Tsis tshua muaj corrosion resistant, tshwj xeeb tshaj yog nyob rau hauv cov dej tshiab. Lub teeb yuag thiab siab - lub zog, ua kom yooj yim rau kev sib sau thiab txav mus los. Tsis tas yuav tsum tau pleev xim, ua rau cov nqi kho mob tsawg heev.
Disadvantages: Tus nqi pib ntau dua li cov hlau. Thaum muaj zog, nws tsis nruj dua li cov hlau, qee zaum yuav tsum muaj tus ntoo khaub lig loj dua -section los tiv thaiv deformation.
4.Dab tsi yog qhov zoo thiab qhov tsis zoo ntawm cov hlau tsis muaj hlau hloov?
Qhov zoo: zoo heev corrosion kuj thiab siab zog. Tshwj xeeb tshaj yog 316 marine- qib stainless hlau, uas muaj zog heev tiv thaiv chloride ion corrosion, ua rau nws zoo tagnrho rau seawater los yog siab - ntsev ib puag ncig.
Disadvantages: Tus nqi siab tshaj, hnyav tshaj plaws, thiab nyuaj rau kev ua haujlwm.
5.Yuav ua li cas thiaj li muaj peev xwm tiv thaiv -corrosion kho steels?
Ua haujlwm "hnyav-lub luag haujlwm tiv thaiv- xeb txheej txheej," xws li epoxy zinc- nplua nuj primer + epoxy micaceous hlau oxide nruab nrab lub tsho + polyurethane topcoat, muaj kev tiv thaiv corrosion ntev dua li ib txheej zinc plating.
Xwb, chromium- dawb zinc- txhuas txheej thev naus laus zis xws li Dacromet tuaj yeem siv, muab kev tiv thaiv corrosion ntau tshaj qhov kub ntawm -dip galvanizing.