1. Vim li cas qhov chaw tu cov hlau phaj tsim nyog ua ntej galvanizing? Cov kauj ruam tshwj xeeb yog dab tsi?
Thaum lub sij hawm dov, dov roj, hlau hmoov, thiab lwm yam kab mob nyob rau saum npoo ntawm steel phaj. Cov impurities no cuam tshuam kev sib cuag ntawm cov zinc molten thiab steel phaj, ua rau tsis tiav galvanizing los yog txheej adhesion tsis zoo.
Yog li ntawd, ua ntej -galvanizing tu yog qhov tseem ceeb thiab feem ntau suav nrog peb kauj ruam:
Degreasing Cleaning: Ua ntej, cov sawb hlau yog txau thiab txhuam nrog lub siab -kub alkaline tov kom zoo tshem cov roj thiab av.
Electrolytic Cleaning: Cov sawb hlau yog kho raws li cov electrode hauv cov tshuaj electrolyte. Cov npuas tsim los ntawm electrolysis "strip" tshem tawm cov residues zoo heev los ntawm qhov chaw, ua tiav cov nyhuv purification tob.
Rinsing and Drying: Lub nto ntawm lub sawb hlau yog rinsed huv si nrog dej deionized thiab ces kom qhuav nrog cua kub los npaj nws rau tom ntej annealing nyob rau hauv lub cub tawg.
2. Vim li cas thiaj yuav tsum tau annealing? Yuav ua li cas thaum lub sij hawm annealing txheej txheem?
Tom qab ntxuav, cov ntawv hlau tseem muaj cov yeeb yaj kiab oxide nyias ntawm nws qhov chaw, uas tiv thaiv cov kua zinc los ntawm ntub nws. Yog li ntawd, lub hom phiaj tseem ceeb ntawm cov txheej txheem annealing yog ob npaug:
Restoring cov khoom siv: Los ntawm cua sov cov sawb hlau saum toj no nws qhov kub thiab txias recrystallization (feem ntau tshaj 730 degree), qhov kev ntxhov siab sab hauv los ntawm cov txheej txheem txias dov dhau los raug tshem tawm, rov ua kom cov hlau tsis muaj plasticity thiab ductility.
Txo kev ua haujlwm saum npoo: Hauv lub qhov cub annealing uas muaj qhov txo qis ntawm hydrogen thiab nitrogen, lub tshuab hluav taws xob txo cov oxide zaj duab xis mus rau qhov ntshiab, "sponge-zoo li, active hlau ntshiab." Qhov no tso cai rau cov sawb hlau kom hnov mob sai sai nrog cov kua zinc thaum nws nkag mus rau hauv zinc da dej, kom ntseeg tau tias muaj kev sib raug zoo ntawm metallurgical.
3. Yuav ua li cas tswj zinc txheej thickness thiab tsim qhov kawg nto thaum lub sij hawm galvanizing?
Tom qab annealing, lub sawb hlau yog tam sim ntawd raus rau hauv ib tug molten zinc da dej ntawm kwv yees li 460℃rau kub -dip galvanizing. Tom qab tawm hauv cov zinc da dej, cov cuab yeej tseem ceeb txiav txim siab qhov kawg ntawm qhov zoo thiab txheej txheej yog cov riam cua.
Kev Tswj Txheej Txheem: Cov riam cua muaj ib khub ntawm lub taub hau uas txau siab - ceev compressed roj. Los ntawm kev kho cov roj siab, tus nqi txaus, thiab kev ncua deb ntawm cov sawb hlau, ntau tshaj molten zinc tuaj yeem tawg, yog li precisely tswj cov zinc txheej thickness. Cov txheej txheej tuab yog kwv yees li ntawm 45-275 g / m² (G30 rau G90 qib).
Zinc Paj Tsim: Tom qab tawm ntawm zinc da dej, cov sawb hlau nkag mus rau hauv ib lub tsev txias kom txias sai. Qhov loj thiab muaj ntawm zinc paj nyob ntawm seb muaj pes tsawg leeg ntawm zinc molten thiab kev tswj ntawm qhov cua txias.
Ib txwm Zinc Paj: Tso cov zinc txheej kom txias thiab khov kho ib txwm muaj thiab maj mam tsim cov qauv zinc siv lead ua sib txawv.
Tsis muaj Zinc Paj / Me Zinc Paj: Los ntawm kev ntxiv cov ntsiab lus xws li antimony thiab bismuth rau cov zinc molten thiab ua kom lub zog txias, qhov kev loj hlob ntawm zinc muaju yog inhibited, uas ua rau muaj qhov sib xws thiab zoo.
4. Dab tsi yog qhov tseem ceeb ntawm kev kho mob tom qab galvanizing? Lawv lub luag haujlwm yog dab tsi?
Tom qab cov zinc coils raug tshem tawm los ntawm zinc da dej thiab txias, cov nram qab no ncej - kev kho mob feem ntau yog ua los txhim kho corrosion kuj los yog muab ntxiv zog:
Passivation: Kev kho mob yooj yim tshaj plaws. Ib zaj duab xis hloov dua siab tshiab (xws li chromate lossis chromium-dawb passivation zaj duab xis) yog tsim nyob rau saum npoo ntawm txheej galvanized siv cov tshuaj tov tshuaj. Qhov no zoo tiv thaiv xeb dawb los ntawm kev tsim ntawm cov galvanized coils vim ya raws thaum khaws cia thiab kev thauj mus los. Qhov no yog kev tiv thaiv nto ib ntus.
Kev kho roj: Tom qab passivation, ib txheej nyias ntawm xeb- tiv thaiv roj yog siv los txhim kho xeb tiv thaiv ntxiv.
Phosphating Treatment: Ib zaj duab xis phosphate chemical yog tsim rau ntawm zinc txheej txheej. Cov yeeb yaj kiab no txhim kho qhov adhesion ntawm cov xim tom ntej los yog hmoov txheej, ua rau nws tshwj xeeb tshaj yog haum rau cov nplooj ntawv uas yuav tsum tau pleev xim tom ntej.
Fingerprint Resistant Treatment: Ib zaj duab xis organic composite yog coated rau saum npoo. Qhov no tsis tsuas yog tiv thaiv xeb tab sis kuj tiv thaiv cov ntiv tes los ntawm kev tso tseg. Nws yog tsuas yog siv nyob rau hauv cov teb uas muaj kev zoo nkauj zoo nkauj, xws li cov khoom siv hauv tsev thiab cov khoom siv hluav taws xob.
5. Cov kev kho saum npoo no cuam tshuam li cas rau kev ua haujlwm ntawm cov khoom kawg?
Cov kev kho deg sib txawv endow galvanized cov khoom lag luam nrog cov khoom sib txawv kom tau raws li cov kev xav tau sib txawv ntawm cov neeg siv khoom qis.
Kev kho deg (Code) Core Functions thiab Applications
Passivation (C) Muab luv luv - tiv thaiv xeb dawb thiab yog qhov yooj yim tshaj plaws corrosion- tiv thaiv kev kho mob.
Passivation + Oiling (CO) Ntxiv cov roj zaj duab xis rau saum cov zaj duab xis passivation, muab kev tiv thaiv xeb zoo dua, haum rau kev thauj mus los hauv hiav txwv lossis ntev - khaws cia.
Phosphating (P) Raws li txheej txheej pretreatment rau tom qab tha xim, ua kom cov xim adhesion zoo dua.
Lacquer Sealing (L) Coats ib zaj duab xis nyias nyias, muab qee qhov kev tiv thaiv corrosion thiab cov ntiv tes tiv thaiv.
Fingerprint Resistant (N) Tsim tshwj xeeb rau cov khoom siv hauv tsev thiab cov khoom siv hluav taws xob, tiv thaiv cov ntiv tes los ntawm kev sib chwv tsis tu ncua.