Dab tsi yog galvanizing?
Galvanizing yog ib qho ntawm cov txheej txheem ntau tshaj plaws thiab feem ntau siv los tiv thaiv cov hlau los ntawm corrosion. Nws muab cov txheej nyias ntawm zinc rau cov hlau tuab, ua rau nws tsis tshua muaj kev cuam tshuam rau nws qhov chaw nyob ib puag ncig. Ua ntej, nws tsim cov txheej tiv thaiv uas khi cov hlau los ntawm nws ib puag ncig. Cov txheej zinc tiv thaiv cov hlau tiv thaiv corrosion los ntawm dej, av noo, thiab lwm yam khoom hauv huab cua. Yog tias koj khawb cov zinc npog los ntawm kev sib tsoo thiab khawb tob, cov hlau raug puas tsuaj. Galvanizing kuj tiv thaiv cov hlau los ntawm "galvanic corrosion". Thaum ob lub hlau uas muaj qhov sib txawv ntawm cov khoom siv hluav taws xob sib txawv tuaj rau hauv kev sib cuag nrog ib qho electrolyte, galvanic corrosion tshwm sim. Cov qauv atomic ntawm ob lub hlau qhia tias ib qho yog anode thiab lwm qhov yog cathode. Lub anode corrodes sai dua lub cathode, thaum lub cathode corrodes qeeb qeeb. Vim hais tias cov zinc txheej ua haujlwm ua ib qho kev txi rau anode kom nyiam corrode cov hlau hauv qab, cov txheej txheem galvanizing muab kev tiv thaiv corrosion siab rau cov hlau hauv qab, yog li txo qhov corrosion ntawm lub hauv paus hlau lossis cathode. Thaum cov hlau tsis tu ncua raug rau ib puag ncig yam tsis muaj zinc txheej tiv thaiv, nws oxidizes thiab corrodes sai dua.
Galvanizing yog siv dav hauv ntau daim ntawv thov, xws li cov tsev sab nrauv, cov kav dej, laj kab, thiab qhov chaw tsheb. Thaum nws los txog rau kev tiv thaiv corrosion, galvanized steel yog ib qho txiaj ntsig zoo rau cov khoom siv xws li austenitic stainless hlau thiab txhuas, nrog rau kev siv tau zoo thiab muaj txiaj ntsig zoo los tiv thaiv cov hlau tiv thaiv corrosion.
Cov yam ntxwv ntawm Galvanizing
- Zoo Durability: Txawm tias nyob rau hauv cov xwm txheej nyuaj, cov txheej txheej galvanized tuaj yeem txuas ntxiv mus rau ntau xyoo. Galvanized coatings yog qhov zoo rau kev siv sab nrauv xws li laj kab, teeb ncej, txuas hniav, thiab kev tsim vaj tsev vim lawv lub neej ntev.
- Tus nqi qis dua
- Sustainability
- Yooj yim rau kev thov
- Cov tsos zoo
Tom ntej no, peb yuav qhia ntau yam txheej txheem galvanizing rau koj:
Kub-dip Galvanizing
Nws tseem hu ua kub-dip galvanizing thiab yog ib txoj hauv kev zoo los tiv thaiv hlau los ntawm corrosion. Thawj kauj ruam nyob rau hauv kub-dip galvanizing yog pickle steel pieces. Tom qab pickling, steel pieces yog ntxuav nrog ib tug aqueous tov ntawm ammonium chloride los yog zinc chloride, los yog ib tug ua ke aqueous tov ntawm ammonium chloride thiab zinc chloride, ua ntej yuav dipped rau hauv ib da dej ntawm molten zinc, uas ib txwm rhuab mus rau 840 degree F ( 449 degree). Cov hlau yog immersed nyob rau hauv zinc da dej rau ib lub sij hawm luv luv, feem ntau yog 3-5 feeb, kom cov zinc hnov mob nrog cov hlau nto thiab tsim ib txheej ntawm zinc-hlau alloy rau saum npoo. Cov txiaj ntsig ntawm kub-dip galvanizing yog tias nws muaj zog tiv thaiv corrosion, thiab adhesion thiab hardness ntawm galvanized txheej yog txhim kho kom ua tiav lub hom phiaj tiv thaiv corrosion.
Kub-dip galvanizing yog cov txheej txheem tshuaj uas muaj cov tshuaj tiv thaiv electrochemical. Kub-dip galvanizing yuav ua rau cov hlau molten react nrog cov hlau substrate los ua ib txheej hlau, sib txuas cov substrate thiab txheej.
Kub-dip galvanizing yog tsim nyog rau lub sij hawm ntev tiv thaiv xeb ntawm feem ntau "tawv" workpieces xws li txoj kev loj laj kab, lub hwj chim yees, thiab loj-size fasteners. Cov kav dej hlau tau yav tas los kub-dip galvanized thiab.
Electro-galvanizing
Electro-galvanizing yog feem ntau siv txheej rau kev lag luam fasteners, thiab nws nquag siv rau cov khoom siv bracket. Tom qab degreasing thiab pickling, nws siv cov khoom siv electrolytic immerses lub workpiece nyob rau hauv ib tug zinc ntsev tov thiab txuas cov electrode tsis zoo ntawm cov khoom siv electrolytic; nws tom qab ntawd muab lub phaj zinc rau ntawm qhov sib txawv ntawm qhov chaw ua haujlwm, txuas nws mus rau qhov zoo electrode ntawm cov khoom siv electrolytic, thiab tig rau lub zog. Siv cov kev taw qhia txav ntawm tam sim no los ntawm qhov zoo mus rau qhov tsis zoo, txheej txheej ntawm zinc yog tso rau ntawm qhov chaw ua haujlwm. Thaum zinc yog qhov nyuaj rau kev hloov pauv hauv huab cua qhuav, zinc carbonate txheej tuab heev tuaj yeem tsim rau ntawm qhov chaw hauv huab cua ntub, tiv thaiv sab hauv los ntawm corrosion. Thaum cov txheej txheej raug puas tsuaj los xij, thiab lub substrate tsis loj heev, zinc thiab steel substrate sib xyaw ua ke los tsim ib lub roj teeb me me, hloov cov fastener substrate rau hauv cathode thiab tiv thaiv nws.
- Cov zinc txheej tuab yog zoo, zoo ib yam, thiab tsis muaj crystallization, zoo heev corrosion kuj.
- Cov zinc txheej tau los ntawm electroplating yog cov ntshiab, thiab nws corrodes maj mam nyob rau hauv cov huab cua xws li acid thiab alkali, zoo tiv thaiv cov hlau substrate.
- Zinc plating yog passivated los ntawm chromic acid los ua dawb, xim, tub rog ntsuab, thiab lwm yam, uas yog zoo nkauj thiab dav nrog ib tug tej yam degree ntawm kho kom zoo nkauj.
- Vim yog zinc txheej txheej ductility, nws yuav txias-punched, dov, khoov, thiab lwm yam yam tsis muaj kev puas tsuaj rau txheej.
Lub workpiece muaj ib tug du thiab tiaj tus tom qab electro-galvanizing, tab sis vim hais tias cov txheej yog heev nyias, lub electro-galvanizing ib txwm nyob rau hauv 5-30 microns, yog li lub sij hawm los tiv thaiv corrosion yog luv luv. Ob leeg yog siv los tiv thaiv xeb ntawm sab hauv tsev xws li txee hauv qab, panels, me me fasteners, thiab lwm yam.
Cov txiaj ntsig tseem ceeb ntawm galvanizing yog nws cov kev tiv thaiv corrosion siab. Zinc coatings ua haujlwm raws li qhov thaiv ntawm cov hlau thiab nws ib puag ncig, tiv thaiv corrosion. Zinc kuj muaj lub peev xwm txawv txawv rau "kho tus kheej," uas txhais tau hais tias yog cov txheej txheej yog khawb lossis tawg, nws cuam tshuam nrog oxygen thiab noo noo hauv huab cua los tsim ib txheej tshiab ntawm zinc oxide tiv thaiv. Galvanizing yog ib txoj hauv kev zoo thiab hloov tau ntawm kev tiv thaiv corrosion rau hlau. Nws yog suav hais tias yog nws cov durability, nqi-effectiveness, thiab sustainability thiab yog siv nyob rau hauv ib tug xov tooj ntawm industries xws li kev tsim kho, automotive, thiab industrial manufacturing.
Txuas Txuas:
