Lub ntsiab lus ntawm rusting ntawm channel steel yog tias carbon steel undergoes electrochemical corrosion nyob rau hauv ib puag ncig humid / oxidizing. Channel steel muaj grooves thiab ntau lub ces kaum, ua rau nws yooj yim rau cov dej tsub zuj zuj thiab plua plav tsub zuj zuj, yog li ua rau cov xeb ntau dua piv rau cov pav ca. Hauv qab no yog peb txheej txheej kev daws teeb meem rau koj los siv: txheej txheem kho → txheej txheem tsim khoom → khaws cia.
I. Dab tsi tuaj yeem ua tiav hauv cov txheej txheem ?(zoo tshaj, daws qhov teeb meem ntawm qhov chaw)
| Txheej txheem | Anti- muaj peev xwm xeb | Muaj cov xwm txheej | Cov ntsiab lus tseem ceeb |
| Kub-dip galvanizing (HDG) | ★★★★★ | Sab nraum zoov, structural channel steel | Feem ntau siv, zinc txheej ua raws li kev txi anode rau kev tiv thaiv, nrog rau lub neej ntev txog 20 xyoo; ua tib zoo saib xyuas kom txias tom qab galvanizing kom tsis txhob xeb dawb |
| Electro-galvanizing / Txias-galvanizing | ★★★ | Nyob sab hauv tsev, luv - lub sij hawm hloov pauv | Nyias zinc txheej, zoo li zoo, tab sis corrosion kuj yog nyob deb inferior rau kub galvanizing |
| Epoxy zinc-nplua nuj primer + topcoat | ★★★★ | Steel qauv tej yaam num, hnyav-lub luag hauj lwm los tiv thaiv-corrosion | Ua ntej, sandblast rau xeb tshem tawm mus rau Sa2.5 tus qauv, zinc cov ntsiab lus ntawm primer yuav tsum siab tshaj los yog sib npaug rau 70%, ces sib tov epoxy hlau oxide intermediate xim + polyurethane topcoat |
| Anti-cov roj xeb / Passivation tus neeg sawv cev | ★★ | Export shipping, luv - cov khoom muag | Inter- txheej txheem los tiv thaiv- xeb, tus nqi qis, yuav tsum tau rov ua dua tshiab |
| Alloying kev kho mob (xws li huab cua-resistant steel) | ★★★★ | Sab nraum zoov raug cov qauv | Tsim cov txheej txheej tuab los ntawm kev ntxiv Cu, Cr, Ni, tab sis tus nqi siab; zoo tib yam Q235/Q355 tsis muaj nws |
II. Dab tsi yuav tsum tau them sai sai rau thaum lub sijhawm tsim khoom
- Acid ntxuav yuav tsum tau qhuav sai.Tom qab ntxuav cov kua qaub kom tshem tawm xeb, qhov chaw muaj kev ua haujlwm siab heev. Yog tias muaj cov dej seem seem, nws yuav xeb dua li ob peb teev. Acid ntxuav → ntxuav dej → nruab nrab → cua kub kom qhuav yuav tsum tsis tu ncua, thiab tsis txhob tso rau sab nraum zoov tos.
- Tswj cov cua sov seem ntawm dov / txias kos duab.Thaum cov hlau tawm hauv lub txaj txias, yog tias qhov kub siab tshaj qhov chaw ib puag ncig, nws yuav condense ("hws") thaum raug huab cua ntub. Nws yuav tsum tau muab tso rau tom qab txias tag rau hauv chav tsev kub los yog tawm qhov cua qhov khoob thaum stacking.
- Kev tuav ntawm kev txiav/drilling npoo.Txiav nto thiab laum npoo yog cov ntsiab lus tsis muaj zog rau kev tiv thaiv- xeb (cov txheej txheej galvanized puas), nws yuav tsum tau rov qab-coated nrog zinc- nplua nuj primer lossis galvanized kho xim tom qab ua tiav, thiab yuav tsum tsis txhob raug.
- Tsis txhob hla - paug.Txiav cov kua dej, tes hws, kua qaub- cov seem seem ntawm cov kab ntau lawm yuav ua kom xeb. Hnav hnab looj tes thaum caij tsheb thauj mus los, cais thaj chaw cov khoom tiav los ntawm thaj chaw ntxuav cov kua qaub.
- Tiv thaiv "dawb xeb" ntawm galvanized qhov chaw.Yog tias qhov kub kub galvanizing tsis tag nrho qhuav ua ntej ntim nruj, cov xeb dawb (basic carbonate zinc) yuav tsim nyob rau hauv ib qho chaw ntub thiab kaw. Yuav tsum muaj: tag nrho passivate thiab qhuav tom qab galvanizing, ntxiv desiccant thaum ntim, cais channel steel nrog ntoo strips thiab tawm qhov khoob.
III. Cia (warehouse / shipping) ceev faj
- Nce thiab kom deb ntawm av:Siv cov ntoo thaiv los yog cov hlau txhawb nqa rau hauv qab ntawm cov channel steel Ntau dua lossis sib npaug li 15cm kom tiv thaiv kev sib cuag ncaj qha nrog av noo. Tsis txhob tso ncaj qha rau hauv av cement.
- Qhov cua thiab dryness:Qhov txheeb ze av noo ntawm lub tsev khaws khoom yuav tsum tswj qis dua 60%. Kaw lub qhov rais rau hnub los nag, thiab cua rau hnub tshav ntuj; stack cov channel steel nrog grooves tig los los yog sideways kom tsis txhob muaj dej thiab plua plav.
- Kev cais thiab cais tawm:Khaws cov khoom galvanized thiab cov ntaub ntawv dub cais kom tsis txhob muaj kev puas tsuaj rau zinc txheej los ntawm cov khoom tawv; cais sib txawv batch thiab specifications kom txo tau tuav.
- Npog tab sis tsis sealing: Thaum npog nrog cov ntaub tsis muaj dej, tawm qhov cua qhib. Ua kom tiav sealing yuav ua rau condensation vim qhov kub sib txawv; tso cov desiccant rau hauv lub thawv xa khoom (tsawg kawg 4-6 daim ib lub thawv 20-ko taw).
- Ua ntej-hauv, thawj- tawm:Lub sijhawm siv tau ntawm kev tiv thaiv- xeb roj / cov yeeb yaj kiab passivation feem ntau yog 3-6 lub hlis. Rov xyuas dua thiab rov thov dua yog tias cov khoom muag dhau lub sijhawm.
- Tsis txhob corrosive ib puag ncig: Nyob deb ntawm cov nroj tsuag tshuaj, thaj chaw ntsev ntsev ntawm ntug dej hiav txwv, thaj chaw thee; Yog tias tsis tuaj yeem zam, hloov mus rau kub galvanizing lossis txheej txheej daws teeb meem.
Hauv cov ntsiab lus, cia siab rau cov roj rau luv -lub sij hawm, galvanizing rau nruab nrab - lub sij hawm, thiab xim rau ntev - lub sij hawm
Siv cov tshuaj tiv thaiv- xeb roj rau kev hloov pauv ntawm cov txheej txheem, xaiv kub galvanizing rau cov khoom tiav, thiab siv epoxy zinc- nplua txheej txheej rau hnyav-lub luag haujlwm tiv thaiv- corrosion nyob rau sab nraum zoov; hauv kev tsim khoom, tsom mus rau "kev ziab" thiab "re- txheej txheej ntawm cov npoo", thiab hauv kev cia, tsom mus rau "nce, qhov cua, thiab tsis muaj dej tsub zuj zuj hauv grooves".
