Yog tias cov ntsiab lus ntawm silicon ntawm cov hlau grating yog siab, zinc-nickel alloy tuaj yeem muab ntxiv kom txo cov zinc. Plating flux additives kuj tuaj yeem muab ntxiv kom cov txheej txheem galvanized zoo nkauj. Thaum lub sij hawm kub-dip galvanizing txheej txheem ntawm steel gratings, nws yog ib qhov tsim nyog yuav tau ua kom lub nto ntawm steel gratings ci thiab txheej nyias. Qhov no muaj ntau yam ua rau txhua tus txheej txheem. Lub pickling tsis nyob rau hauv qhov chaw, cov mis ntawm cov tshuaj plating yog tsis ncaj ncees lawm, zinc kub yog tsis sib xws, thiab kev tuav hauj lwm yuav tsum tau. Lub lifting ceev ntawm lub tsheb yog ze ze. Cia kuv piav qhia luv luv hauv qab no.
Cov txheej txheem tsim cov txheej txheem kub-dip galvanized txheej ntawm cov grating yog txheej txheem ntawm kev tsim cov hlau-zinc alloy ntawm lub tiaj tus hlau matrix thiab txheej txheej zinc txheej sab nraud. Qhov saum npoo ntawm cov hlau grating workpiece tsim cov hlau-zinc alloy txheej thaum kub-dip plating, uas ua rau cov hlau Nws muaj kev sib raug zoo nrog cov zinc txheej ntshiab, thiab cov txheej txheem tuaj yeem piav qhia luv luv xws li:
Thaum lub steel grating workpiece yog immersed nyob rau hauv lub molten zinc kua, ib tug zinc-hlau (lub cev core) cov khoom tov yog thawj tsim nyob rau hauv lub interface. Qhov no yog siv lead ua los ntawm steel grating puag hlau hlau yaj nyob rau hauv zinc atoms nyob rau hauv ib tug khoom lub xeev. Ob lub atoms hlau yog fused, thiab lub zog gravitational ntawm cov atoms yog me me. Yog li ntawd, thaum zinc ncav cuag saturation nyob rau hauv cov khoom tov, cov atoms ntawm zinc thiab hlau yog dispersed nrog ib leeg. Cov zinc atoms dispersed rau hauv (los yog hu ua) cov hlau matrix migrate nyob rau hauv lub matrix lattice thiab maj mam tsim ib tug alloy nrog hlau, thiab zinc atoms dispersed mus rau hauv cov hlau nyob rau hauv lub zinc molten kua ua ib tug intermetallic compound FeZn13 nrog zinc, uas sinks rau. hauv qab ntawm lub lauj kaub kub-dip galvanizing thiab ua zinc slag. Thaum cov hlau grating workpiece raug tshem tawm los ntawm zinc immersion tov, cov zinc txheej ntshiab ntawm qhov chaw yog tsim rau hauv hexagonal siv lead ua. Nws cov ntsiab lus hlau tsis ntau tshaj 0.003%.
Ua kom kub-dip galvanizing kub ntawm grating, tab sis koj yuav tsum xav txog qhov xwm txheej ntawm lub lauj kaub zinc. Lub lauj kaub hlau yuav tsum tsis pub tshaj 480 degrees, thaum lub lauj kaub ceramic tuaj yeem ncav cuag 530 degrees. Txo lub sijhawm zinc immersion thiab tshem tawm maj mam. Ua kom cov zinc-aluminium alloy tuaj yeem txo cov txheej tuab. Ua kom qeeb ntawm lub workpiece ntawm lub phaj grating kom ceev; sim tswj lub sij hawm galvanizing ntawm lub phaj grating; tsim nyog nce lub thinning ntawm cov hlau.
Kub dip galvanizing ntawm grating yog txheej txheem metallurgical cov tshuaj tiv thaiv. Los ntawm qhov kev xav ntawm microscopic, cov txheej txheem kub-dip galvanizing yog qhov sib npaug ntawm ob:
Thermal balance thiab zinc-hlau exchange balance. Thaum lub grating workpiece yog immersed nyob rau hauv lub molten zinc kua ntawm txog 450 degree, steel grating workpiece nyob rau hauv chav tsev kub absorbs tshav kub ntawm zinc kua. Thaum nws nce mus txog 200 degree, kev sib cuam tshuam ntawm zinc thiab hlau maj mam pom meej, thiab zinc nkag mus rau saum npoo ntawm cov hlau ua haujlwm. Raws li cov hlau grating Qhov kub ntawm lub phaj workpiece maj mam nce mus txog qhov kub ntawm zinc kua, thiab nto ntawm lub workpiece ua ib tug hlau txheej uas muaj sib txawv proportions ntawm zinc thiab hlau, tsim ib tug txheej txheej ntawm zinc txheej. Raws li lub sijhawm dhau mus, cov txheej txheem sib txawv ntawm cov hlau grating txheej qhia txog kev loj hlob sib txawv. Los ntawm qhov kev xav ntawm microscopic, cov txheej txheem saum toj no yog tshwm sim raws li cov hlau grating workpiece raug raus hauv cov kua zinc, thiab cov zinc kua qib ua ebullient. Thaum cov tshuaj tiv thaiv zinc-hlau maj mam ua kom sib npaug, cov zinc kua qib maj mam calms. Lub steel grating workpiece raug tshem tawm ntawm zinc kua nto, thiab qhov kub ntawm lub workpiece maj mam txo. Thaum nws ncav cuag qis dua 200, cov tshuaj tiv thaiv zinc-hlau nres, kub-dip galvanized txheej ntawm steel grating yog tsim, thiab cov thickness yog txiav txim.?
1. Dab tsi yog cov thickness yuav tsum tau rau kub-dip galvanizing?
Tam sim no thoob ntiaj teb thiab Suav kub-dip galvanizing qauv rau steel grating kub-dip galvanizing tshuab yog muab faib ua ntu raws li lub thickness ntawm lub phaj. Qhov nruab nrab tuab thiab ib nrab tuab ntawm zinc txheej yuav tsum ncav cuag cov tuab tuab los txiav txim siab qhov kev ua haujlwm tiv thaiv corrosion ntawm zinc txheej. Steel grating workpieces nrog txawv thicknesses yuav tsum sib txawv lub sij hawm kom ua tau thermal equilibrium thiab zinc-hlau pauv tshuav nyiaj li cas, thiab lub resulting txheej thicknesses kuj txawv. Cov tuab tuab ntawm txheej txheej hauv cov txheej txheem yog raws li kev tsim khoom lag luam ntawm cov txheej txheem galvanizing saum toj no. Lub thickness ib nrab yog tus nqi empirical yuav tsum tau coj mus rau hauv tus account qhov tsis sib xws ntawm zinc txheej thickness thiab cov yuav tsum tau rau corrosion kuj ntawm txheej. Yog li, ISO qauv, American ASTM cov qauv, Japanese JIS cov qauv thiab Suav cov qauv muaj qhov sib txawv me ntsis rau zinc txheej thickness. Raws li cov kev cai nyob rau hauv kub-dip galvanizing specification ntawm cov neeg koom pheej ntawm Tuam Tshoj GB / B 13912-2002. Cov zinc npaum li cas specifications rau kub-dip galvanized steel grating khoom yog raws li nram no: yog hais tias lub thickness ntawm kub-dip galvanized steel grating yog ntau tshaj los yog sib npaug zos rau 6 hli, qhov nruab nrab thickness ntawm cov zinc nyiaj ntawm kub-dip galvanized steel grating yuav tsum. yuav tsum siab tshaj 85 microns, thiab ib nrab thickness yuav tsum siab tshaj 70 microns. Yog hais tias lub thickness ntawm kub-dip galvanized steel grating yog tsawg tshaj li 6 hli thiab ntau dua 3 hli, cov tuab tuab ntawm zinc cov ntsiab lus ntawm cov kub-dip galvanized steel grating yuav tsum ntau tshaj 70 microns, thiab ib feem thickness yuav tsum ntau dua. 55 microns. Yog hais tias lub thickness ntawm kub-dip galvanized steel grating yog tsawg dua 3 hli thiab ntau dua 1.5 hli, cov tuab tuab ntawm zinc cov ntsiab lus ntawm kub-dip galvanized steel grating yuav tsum ntau dua 55 microns, thiab qee qhov yuav tsum siab dua. 45 microns.
2. Dab tsi yog qhov cuam tshuam thiab cuam tshuam ntawm kub-dip galvanizing txheej thickness?
Lub thickness ntawm kub-dip galvanized txheej ntawm steel grating txiav txim qhov kev tiv thaiv corrosion ntawm steel grating. Cov neeg siv tuaj yeem xaiv cov zinc txheej tuab uas siab dua lossis qis dua tus qauv. Rau nyias steel gratings nrog du nto hauv qab 3 hli, nws yog ib qho nyuaj kom tau cov thicker coatings nyob rau hauv industrial ntau lawm. Tsis tas li ntawd, zinc coatings uas tsis sib haum nrog lub thickness ntawm steel gratings Thickness cuam tshuam rau lub zog sib txuas ntawm cov txheej thiab cov substrate nrog rau cov tsos zoo ntawm txheej. Cov txheej tuab tuab heev yuav ua rau cov txheej txheej yuav ntxhib hauv qhov tsos thiab yooj yim rau tev tawm. Lub plated steel grating tsis tuaj yeem tiv thaiv lub pob thaum thauj thiab teeb tsa. Yog tias muaj ntau cov khoom siv silicon thiab phosphorus hauv cov khoom siv raw ntawm steel grating, nws yuav nyuaj heev kom tau txais cov txheej nyias nyias hauv kev tsim khoom. Qhov no yog vim hais tias cov ntsiab lus ntawm silicon nyob rau hauv cov hlau cuam tshuam rau txoj kev loj hlob ntawm cov txheej txheem alloy ntawm zinc thiab hlau, uas yuav ua rau cov theem tsim. Cov txheej zinc-hlau alloy loj hlob sai heev thiab yuav txav mus rau saum npoo ntawm txheej txheej, ua rau cov txheej txheej ntawm cov txheej txheej yuav ntxhib thiab npub, tsim cov txheej dull nrog cov adhesion tsis zoo.
Yog li ntawd, raws li qhia nyob rau hauv cov lus saum toj no, muaj kev tsis meej nyob rau hauv txoj kev loj hlob ntawm galvanized txheej ntawm steel gratings. Nws yog feem ntau nyuaj kom tau txais qee yam ntawm cov txheej tuab hauv kev tsim khoom tiag tiag. Lub thickness teev nyob rau hauv kub-dip galvanizing specifications rau steel gratings yog txiav txim siab tom qab ntau yam kev ntsuam xyuas. Cov txiaj ntsig kev paub tsim los siv rau hauv ntau yam thiab cov kev xav tau thiab yog qhov tsim nyog.
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