Dub oxide yog cov txheej txheem hloov tshuaj lom neeg siv rau cov hlau ferrous, stainless hlau, tooj liab alloys, thiab zinc- cov ntaub ntawv steel. Tsis zoo li dub anodizing, dub oxide siv cov tshuaj tiv thaiv los tsim cov yeeb yaj kiab tiv thaiv dub (ferric oxide) ntawm qhov chaw.
Cov yeeb yaj kiab tiv thaiv no yog nyob nruab nrab ntawm 0.5 thiab 2.5 micrometers tuab. Nws qhov cuam tshuam rau qhov loj me ntawm cov khoom yog negligible; Yog li ntawd, nws tau dhau los ua qhov kev xaiv ntau tshaj plaws rau kev kho qhov chaw siab ntawm -cov khoom muaj tseeb xws li iav, bearings, thiab cov cuab yeej kho qhov muag.
Dub Oxide VS Rust
Ntau tus neeg tuaj yeem ntseeg yuam kev tias dub oxide thiab xeb zoo ib yam. Thaum ob qho tib si yog nto - ua hlau oxides, lawv cov qauv tshuaj thiab lub cev muaj zog sib txawv kiag li.
Dub oxide(Fe₃O₄-Magnetite) has a dense and stable structure, allowing it to adhere tightly to the metal substrate and prevent further oxygen corrosion.
xeb(Fe₂O₃-Hematite) muaj cov qauv xoob, ntxeem tau, thiab hygroscopic, ua tsis tiav cov txheej txheem tiv thaiv zoo. Nws lub xub ntiag accelerates hlau corrosion.
Dub Oxide txheej txheem piav qhia
Hom Dub Oxide
Kub Dub Oxide: Lub workpiece yuav tsum tau muab tso rau hauv qhov siab -concentration alkaline ntsev tov ntawm qhov kub txog li 140-145℃(285-}295℃F). Qhov no ua rau muaj zog, hnav-resistant dub oxide zaj duab xis uas ua tau raws li cov tub rog specifications (xws li, MIL-DTL-13924).
Nruab nrab-Tsub Kub Dub Oxide: Qhov kub thiab txias yog 90-120℃. Muab piv rau Kub Dub Oxide, nws txo cov kev xav tau hnyav thiab corrosive fumes cuam tshuam nrog kev ua haujlwm kub.
Txias Dub Oxide: Ua haujlwm ntawm chav tsev kub, nws cov ntsiab lus tshuaj sib txawv ntawm Kub Dub Oxide thiab Mid -Tsub Dub Oxide. Nws ua tau tso ib txheej ntawm dub tooj liab selenide compound rau ntawm hlau nto, tsis yog hlau oxide hloov zaj duab xis.
Txheej txheem (siv Kub Dub Oxide ua piv txwv)
Ntxuav
Lub workpiece yog thawj zaug rau hauv lub tank uas muaj zog alkaline ntxuav kom saponify thiab tshem tawm cov roj saum npoo, txiav cov kua dej, thiab cov kab mob.
Yaug
Lub workpiece raug xa mus rau lub tank dej huv kom yaug txhua tus neeg ua haujlwm tu qhov seem.
Acid Pickling
Cov workpieces nrog xeb, nplai, lossis cov txheej txheem kho cua sov yog immersed hauv hydrochloric acid lossis sulfuric acid tov kom tshem tawm cov impurities, nthuav tawm cov khoom qub hlau substrate.
Yaug dua
Cov kua txiv hmab txiv ntoo yog rinsed kom tsis txhob muaj kab mob oxidation tank.
Oxidizing
Lub workpiece, tom qab lub thib ob yaug, yog immersed nyob rau hauv ib tug boiling dub oxide ntsev tov rau 15 mus rau 30 feeb los tsim ib tug uniform, ntom dub magnetite txheej.
Yaug Kawg
Tshem tawm cov residual oxide ntsev los ntawm workpiece nto.
Sealing/Post-Kev kho mob
Lub workpiece yog immersed nyob rau hauv ib tug hloov xeb- tiv thaiv roj, ciab, los yog kua roj vanish rau sealing. Cov sealants no sau cov micropores ntawm oxide txheej, cais nws los ntawm ya raws thiab huab cua.
Qhov zoo thiab qhov tsis zoo ntawm cov oxide dub
| Yam ntxwv | Cov lus piav qhia ntxaws |
|---|---|
| Core Zoo | |
| Zoo heev Dimensional Stability | Cov oxide zaj duab xis yog qhov nyias nyias (0.5-2.5μm), tsis tshua hloov pauv qhov loj me thiab kam rau ua ntawm cov khoom. |
| Nruab nrab Corrosion Resistance | Tom qab kev sib khi zoo nrog cov roj, siv quav ciab, lossis cov kua roj vanish, nws tuaj yeem muab kev tiv thaiv corrosion zoo hauv tsev, nrog rau kev ntsuas ntsev ntsev mus txog ntau dua 96 teev. |
| Txo lub teeb pom kev zoo | Dub matte nto tuaj yeem nqus cov teeb pom kev zoo, txo qhov ci ntsa iab thiab kev xav, haum rau cov cuab yeej kho qhov muag, cov khoom siv tub rog, thiab cov cuab yeej phais. |
| Txhim kho Lubricity | Cov qauv ntxeem tau ntawm oxide zaj duab xis tuaj yeem nqus thiab khaws cov roj nplua nyeem, ua "roj zaj duab xis" thiab txo kev sib txhuam thiab hnav ntawm qhov chaw txav. |
| Tus nqi siab -Kev ua tau zoo | Piv nrog rau cov txheej txheem xws li electroplating lossis txheej, dub oxidation muaj txiaj ntsig kev lag luam siab thaum ua cov khoom me me. |
| Tsis muaj kev cuam tshuam rau cov khoom vaj khoom tsev | Cov txheej txheem kub yog qhov qis, thiab nws tsis hloov lub cev lub cev ntawm cov khoom xws li hluav taws xob conductivity, magnetic zog, los yog hardness. |
| Kev txwv & kev txiav txim siab | |
| Tsawg Corrosion Resistance | Qhov kev tiv thaiv corrosion nyob ntawm tus ncej- kev kho cov sealant. Yog hais tias lub sealant txheej yog puas los yog tas, cov nyhuv tiv thaiv yuav poob qis, thiab nws tsis haum rau hnyav sab nraum zoov los yog marine ib puag ncig. |
| Nruab Nrab Hnav Resistance | Cov oxide zaj duab xis yog nyias. Txawm hais tias nws cov tawv tawv yog siab dua li ntawm cov substrate, nws yooj yim puas nyob rau hauv siab - kev sib txhuam los yog cov khoom tawv khawb, yog li nthuav tawm lub hauv paus hlau. |
| Cov khoom xaiv | Nws yog tsim nyog rau carbon steel thiab qis- alloy steel. Txawm hais tias muaj cov qauv tshwj xeeb rau cov hlau tsis muaj steel, tooj liab, thiab lwm yam ntaub ntawv, nws daim ntawv thov tsis yog dav li ntawm cov hlau. |
Dub Oxide VS Lwm Cov Kev Kho Mob Nto
| Yam ntxwv | Dub Oxide | Zinc Plating | Hmoov Txheej | Anodizing |
|---|---|---|---|---|
| Cov ntaub ntawv siv tau | Hlau, Stainless hlau, tooj liab | Hlau | Ntau yam hlau | Aluminium, Titanium thiab lwm yam tsis yog{0}}Hlau |
| Dimensional Hloov | Tsawg heev (Yuav luag Zero) | Qhov nce ntxiv (5-25 hli) | Loj heev (25-150mm) | Qhov nce ntxiv (5-50 hli) |
| Corrosion Resistance | Nruab nrab (nyob ntawm Sealant) | Zoo heev (Sacrificial Anode Protection) | Zoo heev (Physical Barrier) | Zoo heev |
| Hnav Resistance | Nruab nrab | Tsis zoo (Zinc txheej yog qhov muag muag) | Zoo heev | Zoo heev |
| Qhov tshwm sim | Professional Dub | Nyiaj -White, Xim Passivation | Kev xaiv xim nplua nuj | Kev xaiv xim nplua nuj |
| Siv tau Scenarios | Precision Tolerance Parts, Optical, Cov cuab yeej | Sab nraum zoov, Fasteners nyob rau hauv hnyav Environments | Cov tsos mob tshwm sim, Lub Sij Hawm Yuav Tsum Muaj Kev Tiv Thaiv Kev Nyuaj Siab | Kho kom zoo nkauj thiab tiv thaiv cov khoom siv txhuas |
Cov chaw thov
Thaum kawg ntawm tsab xov xwm
Dub oxide yog txheej txheem kho saum npoo uas tsim cov yeeb yaj kiab tiv thaiv ntawm magnetite (Fe3O4) ntawm cov hlau. Txoj kev no tswj xyuas qhov tseeb qhov tseeb ntawm qhov chaw thaum tseem ua kom zoo nkauj zoo nkauj "blackened" nto. Lwm qhov zoo dua yog tias nws pheej yig dua li lwm cov kev kho mob thiab muab qee qhov kev tiv thaiv corrosion. Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias qee cov ntaub ntawv yuav tig liab lossis grey es tsis txhob dub tom qab kho. Tsis tas li ntawd, cov xeb- txheej tiv thaiv yuav deteriorate thaum nws tas lawm.
FAQ
Q: Dab tsi yog qhov zoo thiab qhov tsis zoo ntawm siab - kub blackening thiab chav - kub blackening?
A: High-kub blackening tshuab yog paub tab thiab cov txheej txheem ruaj khov. Nws muaj qhov tshwj xeeb zoo rau qee yam khoom siv. Vim nws txoj kev loj hlob keeb kwm ntev, manufacturers feem ntau yooj yim mus nrhiav. Qhov tsis zoo yog tias nws yuav tsum tau siab - cua sov. Chav-kub blackening yog ib lub tshuab blackening tshiab uas tab tom txhim kho sai. Nws yooj yim thiab ceev, tab sis nws cov nyhuv blackening ntawm qis - carbon steel tsis zoo. Feem ntau, siab -kub blackening technology yog siv. Cov tuam txhab nrog cov peev txheej tuaj yeem npaj lawv tus kheej chav -kub blackening tov.
Q: Vim li cas qhov chaw blackened pib tsim cov pob zeb xeb tom qab lub sijhawm?
A: Cov laj thawj ua tau yog raws li hauv qab no:
1. Cov kev siv hnyav ua rau kev puas tsuaj thiab corrosion ntawm oxide zaj duab xis;
2. Cov txheej txheem blackening tsis tau ua kom zoo, sealing tsis ua tiav, lossis cov nyhuv sealing tsis zoo.
Q: Vim li cas qhov chaw blackened tsim cov te dawb ntawm lawv qhov chaw tom qab khaws cia rau hauv lub tsev rau lub sijhawm ntev?
A: Qhov laj thawj tseem ceeb yog tias cov khoom dub tsis tau ntxuav kom zoo. Ua ntej, muaj cov tshuaj residual tshuaj rau ntawm qhov chaw (nyob rau hauv cov ntaub ntawv uas yuav tsum tau ntxuav dej kub tom qab blackening); Qhov thib ob, qhov concentration ntawm sodium hydroxide siab dhau lawm (sodium hydroxide nyuaj rau ntxuav tawm). Thib peb, cov qauv tsim qauv yog unscientific (piv txwv li, cov tshuaj formula yog nyuaj rau ntxuav tawm nrog dej).
Q: Yuav ua li cas tiv thaiv blackened qhov chaw los ntawm xeb?
A: Qhov no feem ntau yuav tsum tau txhim kho cov txheej txheem. Qhov no tuaj yeem ua tau los ntawm ob yam: kev tu kom huv si; thiab ntxiv cov txheej txheem sealing tom qab blackening los sau cov micropores hauv oxide zaj duab xis txheej, tiv thaiv kev nkag mus ntawm cov dej noo thiab corrosive media. Cov kev cai tshwj xeeb tuaj yeem tham nrog cov chaw tsim khoom blackening; tsuas yog tus nqi xwb.
Q: Puas yuav blackening cuam tshuam precision? Puas yuav siab -kub blackening cuam tshuam rau qhov ntev?
A: Cov txheej txheej oxide txheej ntawm cov xim dub feem ntau ntsuas hauv micrometers, nrog rau qhov hloov pauv loj ntawm ob peb txhiab, yog li qhov cuam tshuam yog qhov tsawg (tshwj tsis yog koj qhov kev xav tau siab heev).
Cov yam tseem ceeb cuam tshuam rau qhov ntev yog:
① Pickling lub sijhawm;
② Siab- qhov kub thiab txias deformation;
③ Cov khoom zoo;
Yog li ntawd, rau siab - qhov precision qhov chaw lossis qhov chaw ua los ntawm cov khoom me me, tiaj tus, nws raug nquahu kom ua tus qauv ua ntej lossis hloov cov txheej txheem ua ntu zus kom tsis txhob poob qhov tsis tsim nyog.
Q: Cov ntaub ntawv twg tuaj yeem ua kom dub?
A: Cov khoom siv xws li tooj liab, hlau, txhuas, thiab stainless hlau tuaj yeem dub.
Cov khoom dub puas yuav ua hluav taws xob?
Cov oxide zaj duab xis tsim los ntawm blackening yog tsis yog -conductive, yog li blackening muaj ib tug tej yam insulating nyhuv.