Muaj ib txwm muaj kev xav tsis zoo uas cov zinc txheej tuaj yeem raug hu ua kub dipped galvanization tab sis qhov no tsis yog qhov tseeb vim tias ua ntej galvanizing kuj yog ib txoj hauv kev nrov los ua galvanized steel. Yog li dab tsi yog qhov txawv ntawm lawv thiab qhov twg muaj qhov zoo dua? Cia peb kawm hauv qab no.
I. Txhais
Ua ntej tshaj plaws, peb yuav tsum paub yuav ua li cas thiaj txhais tau 02txoj kev nrov tshaj plaws los ua galvanized steel: Kub-dip galvanization & pre-galvanizing.
1. Dab tsi yog kub dipped galvanization?
Kub dipped galvanization yog txheej txheem uas cov hlau dipped rau hauv lub pas dej ua ke ntawm zinc. Txhawm rau ua cov hlau galvanized siv txoj kev no, peb yuav tsum ua raws li 4 kauj ruam: ntxuav qhov chaw, fluxing, kub-dipping & txias.
Kub dipped galvanization yog ib qho ntawm feem ntau txoj kev galvanizing hlau thiab lwm yam hlau
2. Pre-galvanizing yog dab tsi?
Pre-galvanizing tseem hu ua zeb galvanizing. Cov txheej txheem no yog ze heev rau kub dipped galvanization tab sis ua nyob rau hauv thawj theem ntawm ntau lawm. Nws ib txwm tshwm sim ntawm cov hlau zeb ntawm cov ntaub ntawv uas twb muaj cov duab tshwj xeeb lossis ua ntej txiav rau qhov ntau thiab tsawg thiab ua tiav.
Pre-galvanizing muaj qee cov kauj ruam ntawm kub dipped galvanization xws li ntxuav qhov chaw, dipping rau hauv cov dej kub zinc dej ua ke nrog cov txheej txheem rov qab.
II. Qhov sib txawv ntawm kub dipped galvanization & pre-galvanizing
1. Daim ntawv thov sib piv
Kub dipped galvanization yog ib qho kev xaiv pheej yig yog tias koj tab tom nrhiav kev daws teeb meem uas tuaj yeem ua tiav ntawm ob qho tib si yooj yim thiab cov duab. Nws feem ntau yog siv rau ntawm cov khoom uas tau tsim ua ntej tab sis tseem yuav tsum tau galvanized thiab kub-dipped galvanization plays raws li cov kauj ruam kawg.
Meanwhile, pre-galvanizing, raws li nws lub npe implies, yog ua nyob rau hauv thawj theem ntawm ntau lawm. Li no, nws feem ntau tshwm sim ntawm cov mills, thiab cov txiaj ntsig ntawm cov txheej txheem yuav raug txiav rau hauv qhov loj thiab tsim tom qab.
2. Txheej sib piv
Raws li ua ib qho kev tiv thaiv txheej rau cov hlau thiab hlau hauv cov khoom tseem ceeb ntawm cov txheej txheem galvanizing, peb tsis tuaj yeem plam tawm ntawm kev sib piv cov txheej txheem ntawm 02 txoj hauv kev los ua cov hlau galvanized.
a. Txheej thickness
Ob txoj kev ua rau ib qho tuab tuab rau txheej txheej. Txawm li cas los xij, qhov kub-dipped galvanization ua ib txheej tuab ntawm kev tiv thaiv tshaj li pre-galvanization ua. Qhov nruab nrab tuab tuab ntawm kub-dip galvanized steel yog ntawm 45-85μm thaum nws nyob nruab nrab ntawm 20 thiab 30 μm rau cov khoom ua ntej galvanized'. \ \
Pre-galvanizing ua thinner tsis tau ntau yam zinc txheej dua li kub dipped galvanization ua
b. Txheej tsis tu ncua
Raws li kub dipped galvanization yuav tsum tau dipping tag nrho cov hlau / hlau rau hauv lub molten vat ntawm zinc, cov galvanized hlau tawm los ntawm cov txheej txheem no muaj ib tug tas mus li txheej saum npoo. Pre-galvanizing yog ua nyob rau hauv thawj theem ua ntej cov nplooj ntawv raug txiav mus rau hauv qhov ntau thiab tsawg, yog li cov npoo txiav tsis coated.
c. Txheej daim ntawv cog lus
Thawj cov kauj ruam ntawm 02 cov txheej txheem ntawm kev ua cov hlau galvanized yog ob qho tib si tu qhov chaw, xws li mechanically, chemically, los yog ob qho tib si. Li no, kev sib raug zoo ntawm lub hauv paus hlau (steel) thiab cov txheej tiv thaiv yog metallurgical thiab muaj zog.
d. Txheej formability
Txheej formability rau cov txheej txheem 02 no txawv kiag li. Raws li pre-galvanizing yog ua nyob rau hauv lub mills, txhua txheej siv rau nws cov txiaj ntsig tuaj yeem ua tiav yam tsis muaj kev puas tsuaj rau txheej. Txawm li cas los xij, txheej txheej formability thov rau kub-dip galvanized steel tsis qhia raws li nws yuav ua rau cov txheej txheem tiv thaiv ntawm cov khoom.
e. Txheej tsos
Qhov kub dipped galvanization ua ib feem ntau ci tiav rau cov hlau galvanized, txawm tias nws tuaj yeem hloov pauv. Raws li rau cov txheej txheem pre-galvanizing, nws tsim ib qho ci ci tiav rau txheej.
3. Abrasion kuj sib piv
Tom qab cov txheej txheem kub-dip galvanizing, muaj 03 txheej txheej txheej thaum kawg ua rau ntawm lub hauv paus hlau. Cov khaubncaws sab nraud povtseg yog metallurgically sib raug zoo rau cov hlau thiab dhau los ua ib feem ntawm cov hlau nws tus kheej, uas tsim cov txheej txheem tiv thaiv zoo meej.
Cov txheej txheem ua ntej galvanizing tsim galvanized steel nrog thinner txheej, uas ua rau nws yooj yim rau corrosion.
4. Kev tiv thaiv kev txi
Cov txheej txheem kub-dip galvanizing tiv thaiv cov hlau hauv peb txoj hauv kev tseem ceeb, tab sis tej zaum txoj kev tseem ceeb tshaj plaws yog los ntawm kev ua cov txheej txheej rau cov hlau. Cov zinc nyob rau hauv cov txheej tiv thaiv ua si ua anode rau cov hlau. Tom qab muaj kev kub-dip galvanization, lub peev xwm tiv thaiv tau txhim kho raws li zinc tam sim no dhau los ua ib feem ntawm cov hlau.
Lub caij no, raws li cov khoom ua ntej galvanized muaj cov txheej nyias nyias thiab yuav raug txiav tom qab rau qhov ntau thiab tsawg, kev tiv thaiv kev txi yuav zoo li kub-dip galvanized steel.
| Feature | Kub dipped galvanization | Pre-galvanizing |
|---|---|---|
| Txheej thickness | Cov txheej tuab nrog qhov nruab nrab yam tsawg kawg nkaus ntawm 45-85μm hauv BS EN ISO 1461 | Cov txheej tuab yuav txawv tab sis feem ntau yog circa 20μm rau cov ntawv thiab 20-30μm rau cov hlab thiab cov xov hlau |
| Txheej tsis tu ncua | Nruam txheej ntawm tag nrho cov khoom | Uncoated cheeb tsam ntawm txiav ntug |
| Txheej daim ntawv cog lus | Muaj zog metallurgical daim ntawv cog lus nrog lub hauv paus hlau | Muaj zog metallurgical daim ntawv cog lus nrog lub hauv paus hlau |
| Txheej formability | Kev tsim tom qab kub dipped galvanizing yog tsis qhia raws li nws yuav ua rau lub txheej puas | Cov txheej nyias nyias tuaj yeem tsim ib txwm tsis muaj kev puas tsuaj |
| Txheej txheej | Feem ntau ci tab sis tuaj yeem hloov pauv | Nquag archieve ib lub teeb ci |
| Abrasion tsis kam | Thicker txheej ntawm hard zinc-hlau alloy muab lub siab tiv thaiv kev puas tsuaj | Nyias txheej txheej nrog txo tsis kam mus rau abrasion |
| Kev tiv thaiv kev txi | Muab qhov siab tshaj plaws ntawm kev tiv thaiv kev txi | Txo kev tiv thaiv kev txi vim nyias txheej txheej thiab ntawm qee qhov chaw tsis muaj coated (txiav npoo) |
