1.Yuav ua li cas deg pretreatment?
Weld slag thiab oxide nplai tshem tawm:
Mechanical txoj kev: Siv lub kaum sab xis grinder nrog hlau txhuam / sib tsoo log, sandblasting (steev blasting), los yog siv abrasion. Qhov no yog cov txheej txheem ntau tshaj plaws thiab meej, tshem tawm tag nrho cov weld slag thiab oxide nplai thiab revitalizing saum npoo.
Txoj kev siv tshuaj: Siv cov vuam- tshwj xeeb tu tus neeg saib xyuas lossis muab tshuaj txhuam. Siv cov tshuaj txhuam hniav mus rau qhov chaw weld, hnov mob, thiab tom qab ntawd yaug nrog dej. Haum rau cov txheej txheem nyuaj thiab cov khoom ua haujlwm uas nyuaj rau kev zom, tab sis kev tiv thaiv ib puag ncig thiab pov tseg yuav tsum tau txiav txim siab.
Degreasing thiab tu:
Siv cov tshuaj ntxuav hlau los yog cov kuab tshuaj organic (xws li acetone) kom huv si tshem cov roj, hws, thiab plua plav tawm ntawm qhov chaw. Qhov no yog qhov tseem ceeb rau kev ua kom cov txheej txheej adhesion.
2.Yuav ua li cas xaiv cov tshuaj tsuag / electrophoretic anti-corrosion txheej?
Electrophoretic primer (ED Coat): Tus qauv kub hauv kev lag luam tsheb. Cov workpieces yog immersed nyob rau hauv ib tug electrophoretic txheej da dej, qhov twg ib tug hluav taws xob teb ua rau cov zaj duab xis txheej yuav sib npaug zos rau txhua qhov chaw (xws li welds thiab sab hauv kab noj hniav), muab kev tiv thaiv corrosion heev. Qhov no yog cov txheej txheem txheej txheem rau cov khoom siv xws li automotive rooj thav duab.
Spray primer/topcoat: Epoxy zinc{0}}nplua nuj primer los yog epoxy micaceous iron oxide intermediate coat yog siv. Lawv ua tiav ob txoj kev tiv thaiv xeb los ntawm kev tiv thaiv cathodic ntawm zinc hmoov thiab cov nyhuv shielding ntawm txheej zaj duab xis. Daim ntawv thov yog hloov tau thiab haum rau workpieces ntawm ntau qhov ntau thiab tsawg.
3.Yuav ua li cas rau kev hloov pauv membrane kev kho mob + sealing kev kho mob?
Phosphating: Cov txheej txheem no muaj cov tshuaj tiv thaiv los tsim cov dej -insoluble phosphate crystalline zaj duab xis ntawm cov hlau. Thaum cov yeeb yaj kiab no muaj qee qhov kev tiv thaiv xeb, nws lub luag haujlwm tseem ceeb yog txhawm rau txhim kho xim adhesion; nws feem ntau yog siv los ua pretreatment ua ntej txau los yog electrophoresis.
Passivation: Qhov no feem ntau yog siv rau cov hlau tsis muaj steel, tab sis rau cov pa roj carbon steel, qee cov chromium -dawb passivating agents tuaj yeem tsim cov yeeb yaj kiab tiv thaiv. Nws yog ib puag ncig tus phooj ywg, tab sis lub sij hawm tiv thaiv luv luv.
4.Yuav ua li cas tiv thaiv xeb los yog luv luv -lub sij hawm tiv thaiv ntawm cov txheej txheem?
Inter- txheej txheem xeb inhibitor txheej:
Siv dej-raws li lossis hnyav-raws li inter- txheej txheem xeb inhibitors. Tom qab txau los yog dipping, pob tshab qhuav lossis ntub cov ntaub ntawv tiv thaiv rau saum npoo, muab kev tiv thaiv xeb rau 1-6 lub hlis. Kev pleev xim tom ntej tuaj yeem ua ncaj qha yam tsis muaj kev tu kom huv (saib cov lus qhia cov khoom kom paub meej).
xeb-cov roj tiv thaiv / roj txheej:
Qhov zoo: Kev tiv thaiv xeb zoo thiab tus nqi qis. Disadvantages: Qhov saum npoo yog greasy thiab yooj yim nyiam cov plua plav. Kev degreasing thiab tu kom huv si yog tsim nyog ua ntej pleev xim tom ntej; txwv tsis pub, adhesion yuav raug cuam tshuam loj heev.
Nqus theem corrosion inhibitor (VCI) ntim:
Rau cov khoom siv vuam uas yuav tsum tau ntim rau kev khaws cia lossis kev thauj mus los, VCI xeb-cov hnab pov thawj, xeb- ntawv pov thawj, lossis xeb- cov hmoov pov thawj tuaj yeem siv tau. VCI gas adsorbs mus rau saum npoo hlau hauv qhov chaw kaw, tsim cov txheej txheem tiv thaiv. Qhov chaw nrog cov duab nyuaj thiab cov kab noj hniav sab hauv yog qhov tshwj xeeb.
5.Dab tsi yog cov txheej txheem tsim khoom pom zoo rau automotive tha xim sab hauv cov khoom siv?
Rau huab hwm coj- tsim tsheb sab hauv hlau qhov chaw (xws li lub rooj zaum), cov txheej txheem tshaj lij thiab txhim khu kev qha yog:
Vuam → Mechanical txhaj blasting / sandblasting (kom tshem tawm cov vuam slag thiab oxide nplai) → Degreasing thiab ntxuav → Phosphating kev kho mob → Electrophoretic primer (los yog tsis siv neeg primer spraying) → ziab
Yog tias cov kab ntau lawm tsis muaj cov kab kos duab tiav, kev sib haum xeeb tab sis kev daws teeb meem zoo tuaj yeem siv:
Vuam → Lub kaum ntse ntse sib tsoo / sandblasting los ntxuav lub vuam seam → Ntxuav → Txau ib lub tsho sai sai - ziab epoxy primer lossis tshwj xeeb "weld kho primer".