Galvanizing hlau nrog lawv ob txhais tes: lub ntsiab txoj kev

Hlau khoom thaum lub sij hawm kev lag luam corrode. Raws li ib tug tiv thaiv tawm tsam cov hlau hlau zinc. qhov kev kho no technology nyob rau hauv lub tsev yog heev puas siv tau. Nws yog ib qho tseem ceeb los mus xaiv tus muaj txoj cai kev kho mob xaiv.

Yuav ua li cas yog galvanizing

Tag nrho cov hlau qhov chaw uas raug ua degrees ntawm corrosive dab. Tsis ua tsis tau nws. Thiab tus txheej txheem no yuav tsuas yuav muab ncua. Nrog lub hom phiaj no, thiab siv kev kho mob nrog zinc. Qhov no kev xaiv ntawm cov ntaub ntawv uas tsis yog txhob txwm. Cov kev xaiv no yog ua raws li tus yam ntxwv ntawm lub ob lub Cheebtsam: lub hlau thiab zinc. Zinc muaj ntau electronegative xwb, es tsis steel. Thaum ua ntawv thov rau hlau khoom zinc coating tsim los ntawm galvanic coupling ntawm cov hlau thiab zinc. Nyob rau hauv no txoj kev, nyob rau hauv tus ntawm lwm yam, ambient reacting ib zinc. Tshuaj lom neeg tshua nrog kev koom tes ntawm steel tub ceevxwm. Thiab yog li ntawd nws yuav mus txuas kom ntev li ntev raws li lub zinc coating yog tsis pov tseg kiag li.

Nyob rau hauv tus neeg mob qhov twg lub zinc coating lov, tus tiv thaiv tseem ua hauj lwm. Qhov no yog vim lub fact tias zinc reacts nrog rau oxygen hauv cov huab cua. Raws li ib tug tshwm sim ntawm cov tshuaj dab zinc hydroxide yog tsim. Ib tug muab tshuaj yeeb dej caw kuj muaj kev tiv thaiv cov khoom. Yog li, galvanized hlau tseem ua hauj lwm.

Txoj kev galvanizing

Galvanizing hlau cov khoom yog cov feem ntau nrov txoj kev uas yuav nrog corrosion. Qhov no yog vim lub high piv raws li ib tug tshwm sim ntawm kev soj ntsuam thiab tus nqi pheej yig. Cov nram qab no txoj kev yog siv galvanized hlau:

• txias;
• kub;
• galvanic;
• thermodiffusion;
• thermal tsuag.

Yuav kom xaiv tau qhov zoo tshaj plaws haum kev xaiv, koj thawj zaug yuav tsum los soj ntsuam qhov tej yam kev mob nyob rau hauv uas cov khoom yuav siv tau nyob rau hauv lub neej yav tom ntej. Galvanizing zoo nyob rau hauv lub txheej thickness, lub sij hawm thiab kub tiv thaiv. Galvanizing hlau nrog lawv ob txhais tes tsuas yog tau nyob rau hauv ob txoj kev: txias thiab plated. Nws yog ib nqi sau cia hais tias lub durability ntawm xws kho qhov chaw yuav yog nyob ntawm seb kev khiav hauj lwm tej yam kev mob. Cov zinc txheej yog yooj yim raug rau cov neeg kho tshuab poob siab.

kub zam

Kub galvanizing ntawm hlau yog lub feem ntau cov tswv yim xaiv. Khoom tshuaj reagents siv rau qhov chaw kho mob. Lawv npaj los ntawm kev siv hlau tub ntxhais ntawm tus txheej txheem. Nws yog vim hais tias ntawm no muaj ib tug ib puag ncig teeb meem. Cov txhab zinc siv rau hauv tus txheej txheem. Qhov npaj khoom tsuas dipped rau hauv ib tug da dej ntawm molten zinc.

Tshwj xeeb cov khoom yuav tsum tau rau txoj kev no. Yog li ntawd, qhov no txoj kev yog tsis haum rau galvanized hlau nyob rau hauv tsev.

thermal diffusion txoj kev

galvanized hlau los ntawm tus txheej txheem yuav lub allergic ntawm zinc atoms nyob rau hauv cov qauv ntawm cov hlau cov khoom tsim hlau-zinc hlau nrog ib tug complex qauv. Tag nrho cov txheej txheem yuav siv sij hawm qhov chaw nyob rau heev kub. Thaum ib tug kub ntawm tshaj 2600 degrees zinc kis mus rau hauv lub gaseous lub xeev. Ceev qhov chaw, qhov twg cov hlau cov khoom, uas muaj zinc-muaj hmoov. Haum txoj kev thov ib tug txheej, uas nws thickness tshaj 15 micrometers. Cov uas ua kev tiv thaiv txheej rau kuj yuav muab piv nrog rau cov txheej thov los ntawm kub. Vim hais tias ntawm qhov yuav tsum tau los tsim tej yam tej yam kev mob yog tsis haum rau nws tus kheej-realization.

Gas-thermal txoj kev

Nyob rau hauv no txoj kev, zinc, uas yog nyob rau hauv daim ntawv ntawm cov hmoov, cov huab cua khiav tsuag rau ntawm qhov chaw ntawm hlau cov khoom. Ua ntej txau cov ntaub ntawv uas melted los ntawm lub siab kub thiab nyob rau hauv lub xeev no uas nws txo qis rau hauv kom meej. Galvanizing hlau yog yus muaj los ntawm ib tug uas zoo sib xws yam rau cov neeg mob qhov twg hlau cov khoom muaj ib tug loj loj.

Ib tug feature ntawm tus qauv no yog hais tias tus tiv thaiv txheej muaj ib tug ntau ntawm pores. Yuav kom sau lawv cov khoom yog them nrog xim. Qhov no txheej ntawm ob ntaub ntawv tau raug khaws cia rau 30 xyoo. Qhov no txoj kev muaj peev xwm tsis muab los siv nyob rau hauv lub tsev.

Khaub thuas galvanizing nyob rau hauv tsev

Muaj kuj yog galvanizing txias. Galvanized hlau xws txoj kev yuav thov mus rau lub nws yog xim hlau zinc khoom nyob rau hauv daim ntawv ntawm cov xim. Manufacturers muaj ib tug thoob plaws xaiv ntawm cov nyiaj no. Thiab cov tub ntxhais compositions (e.g., zinc loj feem nyob rau hauv cov ntaub ntawv uas) yuav txawv heev los ntawm txhua lwm yam. Nws yuav paub tseeb hais tias cov nyhuv ntawm cov kev kho mob yuav tau sib txawv.

Txhais tau hais tias rau galvanizing muaj ib tug xov tooj ntawm cov nta. Ib txhia yuav tsum tau ib tug siab zoo ntawm cov kev kawm khoom. Cov yav tas muaj tsawg adhesion muaj peev xwm, vim uas tom qab so qhuav pib flake. Tseem lwm tus yuav them tom qab daim ntawv thov "tsev kab laug sab" ntawm tej kab nrib pleb. Plaub yuav ua hauj lwm nyob rau hauv nrog cov hom kuab tshuaj. Fifth yuav tsum tau daim ntawv thov ntawm tshwj xeeb cov khoom.

Qhov cuab yeej no yog ib tug binary. Yog li ntawd, ua ntej koj thov cov ob cov ntaub ntawv (cov hmoov thiab phau ntawv) yuav tsum tau tov nrog txhua lwm yam. Ua li no nyob rau hauv ib qho ratio ntawm 3 mus rau 1 los yog 1 mus rau 1. Tag nrho cov txheej txheem yuav tsum tau ua xwb nyob rau hauv tej yam tej yam kev mob. Cov huab cua kub yuav tsum yuav zoo thiab nyob rau hauv ntau ntawm 5 mus rau 40 degrees. Nyob rau hauv cov ntaub ntawv no av noo yog los ntawm 30 mus rau 98%. Cov chav tsev nyob rau hauv uas tus txheej txheem yuav tsum tau muaj zoo chaw dim pa. Tom qab ua hauj lwm, nws yuav tsum tau kom huv si aired. Tus neeg saib xyuas yog thov nyob rau hauv ob khaubncaws sab nraud povtseg nrog ib tug caij nyoog ntawm txog 30 feeb. Tom qab ib hnub cov khoom yuav loj nrog xim compositions. Thaum lub sij hawm galvanizing yog tsim nyog los soj ntsuam kev ruaj ntseg cov kev cai. Tag nrho cov ua hauj lwm yog nqa tawm nrog rau kev siv tus kheej tiv thaiv cov khoom.

Lub electroplating txoj kev

Galvanized hlau nyob hauv tsev yuav tsum nqa tawm los ntawm electroplating. Rau no thawj zaug cov khoom yuav tsum tau ntxuav. Tom qab ntawd, qhov khoom dauv rau ib tug ob peb lub vib nas this (2 mus rau 10) nyob rau hauv sulfuric acid. Tom qab hais tias, cov khoom no yog ntxuav nyob rau hauv cov dej. Nyob rau hauv kev npaj no rau lub anodization yog ua kom tiav. Rau installation nyob rau hauv galvanizing tais diav yuav tsum tau xaiv los ntawm inert cov ntaub ntawv, e.g., iav. Tara yog xaiv nyob rau hauv xws li ib tug txoj kev uas accommodates rau kev nthuav dav nrog ib tug electrode txuas mus rau nws.

tam sim no qhov twg los charger yog 6-12 thiab 2-6 A. Nyob rau hauv ntxiv npaj ntsha - tov ntawm tej ntsev, yaj nyob rau hauv dej. Nyob rau hauv kev xyaum, qhov zoo mus coj ib tug zinc ntsev. Koj muaj peev xwm coj ib tug nta sulfuric acid (raws li nyob rau hauv ib lub roj teeb) thiab ntxiv zinc. Raws li ib tug tshwm sim ntawm cov tshuaj tshua hloov mus rau hauv acid insoluble ntsev thiab precipitates. Ib tug zinc nyob twj ywm nyob rau hauv cov tshuaj. Lub precipitate yuav tsum tau muab tshem tawm, tsuas ntws lub kua.

Zinc electrode yog tsim los ntawm ib daim ntawm zinc txaus siab rau cov tooj liab hlau. Los ntawm cov "rho tawm" roj teeb charger yog txhab khoom mus rau workpiece, thiab cov "plus" - mus zinc. Yog li, lub zinc electrode yog yaj thiab tag nrho cov zinc atoms txiav txim nyob rau workpiece.

xaus

hlau galvanizing nyob rau hauv tsev - nws yog ib tug tiag tiag txoj kev. Rau nws cov kev siv yuav tsum tau yuav ib co ntaub ntawv. Piv txwv li, ib tug zinc-xim los yog txias txheej txheem rau electroplating ib zinc piece. Incidentally, lub zinc yuav yuav tau nyob tej taw tes ntawm seem hlau.