Feem ntau, kev kho saum npoo ntawm cov hlau alloys yuav yog electroplating lossis anodizing. Qhov txawv ntawm ob txoj kev no yog dab tsi?
1. Cov kev kho mob sib txawv
Electroplating siv cov khoom siv los ua electroplated li cathode thiab cov khoom siv hlau tib yam li cov plating hlau raws li cov anode (inssoluble anodes kuj siv), thiab cov electrolyte yog cov tshuaj uas muaj cov plating hlau ions. Ib qho tam sim no yog cov tswv yim ntawm cov anode thiab cathode. Cov khoom siv txheej thiab cov khoom siv electroplated yog ob yam khoom sib txawv, xws li npib tsib xee plating ntawm beryllium tooj liab, qhov twg beryllium tooj liab yog cov khoom siv hauv paus thiab npib tsib xee yog txheej.
Anodizing siv tshuaj los yog electrochemical kev kho mob los tsim ib zaj duab xis txheej uas muaj cov hlau tivthaiv ntawm cov hlau nto. Cov khoom siv los kho yog siv los ua cov anode thiab tiv thaiv los ntawm cov khoom siv uas tsim cov txheej txheem zaj duab xis rau saum npoo los ntawm kev siv cov tam sim no sab nraud hauv ib qho electrolyte. Piv txwv li, oxidation ntawm aluminium alloy ua ib zaj duab xis nyias ntawm txhuas oxide nyob rau saum npoo ntawm cov hlau. Aluminium oxide yog tshuaj ruaj khov, yuav tsis oxidized dua, tsis corroded los ntawm acid, thiab tuaj yeem dyed rau hauv ntau xim.
2. Cov khoom siv sib txawv
Cov txheej txheem electroplating yog siv los kho cov hlau feem ntau tab sis kuj tsis yog hlau. Nickel, chromium, tin, tooj liab, nyiaj, thiab kub yog cov feem ntau siv plating hlau. Qhov ntawd yog npib tsib xee plating, chrome plating, kub plating, thiab lwm yam.
Anodizing yog txheej txheem ntawm kev kho hlau nto. Feem ntau cov ntaub ntawv hlau (xws li stainless hlau, zinc alloy, aluminium alloy, magnesium alloy, tooj liab alloy, thiab titanium alloy) tuaj yeem ua anodized hauv cov electrolyte tsim nyog.
3. Cov txheej txheem ua haujlwm sib txawv
Electroplating siv cov khoom siv electroplating li cathode thiab cov khoom siv kho mob anodized li anode.
Electroplating yog vim cov nyhuv; cov hlau anode ions txav mus rau cathode thiab tau txais electrons ntawm cathode rau tso rau ntawm cov khoom yuav tsum tau plated. Nyob rau tib lub sij hawm, cov hlau nyob rau hauv lub anode dissolves, thiab cov hlau ions nyob rau hauv lub electrolyte yog tsis tu ncua replenished.
Ua ntej ntawm tag nrho cov, cov tshuaj electroplating muaj rau lub ntsiab lus: lub ntsiab ntsev, ntsev ntxiv, complexing agent, tsis, anode activator, thiab additives. Lub hauv paus ntsiab lus ntawm electroplating muaj plaub yam: electroplating tov, electroplating cov tshuaj tiv thaiv, electrode thiab cov tshuaj tiv thaiv txoj cai, thiab hlau electrodeposition txheej txheem.
Anodizing siv cov yam ntxwv yooj yim-rau-oxidize ntawm aluminium alloys los tswj kev tsim cov oxide txheej los ntawm electrochemical txoj kev los tiv thaiv ntxiv oxidation ntawm txhuas cov ntaub ntawv thiab ua rau kom cov neeg kho tshuab zog ntawm qhov chaw.
Feem ntau hais lus, lub anode yog ua los ntawm txhuas lossis txhuas alloy, thiab cathode yog cov phaj txhuas. Muab cov txhuas thiab cov phaj txhuas ua ke rau hauv cov tshuaj aqueous uas muaj sulfuric acid, oxalic acid, chromic acid, thiab lwm yam los tsim cov oxide zaj duab xis rau ntawm qhov chaw. Ntawm cov kua qaub no, qhov dav tshaj plaws yog anodizing nrog sulfuric acid.
Aluminium alloy anodizing tshuab yog siv dav tshaj plaws thiab ua tiav zoo tshaj plaws tam sim no, thiab aluminium alloy anodizing tuaj yeem txhim kho qhov tawv tawv, hnav tsis kam, thiab lwm yam ntsuas.
Muaj ntau cov micropores nyob rau hauv txheej nyias ntawm oxide zaj duab xis, uas tuaj yeem nqus tau ntau yam roj nplua nyeem thiab tsim nyog rau kev tsim lub tog raj kheej lossis lwm yam hnav-tiv taus. Cov zaj duab xis micropores muaj zog adsorption muaj peev xwm thiab tuaj yeem pleev xim rau hauv ntau yam xim zoo nkauj thiab ci. Cov hlau tsis-ferrous lossis lawv cov alloys (xws li txhuas, magnesium, thiab lawv cov alloys, thiab lwm yam) tuaj yeem ua anodized. Txoj kev no yog dav siv nyob rau hauv txhua yam khoom, aircraft thiab nws pib qhov chaw, precision instruments thiab xov tooj cua cov khoom, txhua hnub yuav tsum tau, thiab architectural kho kom zoo nkauj.
Vim li cas aluminium alloy tsis haum rau electroplating?
Cov khoom siv tshuaj lom neeg ntawm txhuas yog cov nquag nquag. Yog tias nws yog electroplated nyob rau hauv cov kua qaub electrolyte, cov txhuas ions ntawm lub cathode yuav tsim txhuas ntsev thiab hydrogen gas thaum tau txais electron txo. Yog hais tias nws yog electroplated nyob rau hauv alkaline electrolyte, aluminium hydroxide thiab hydrogen yog generated. Yog li ntawd, aluminium tsis tuaj yeem coated los ntawm electroplating. Qhov no yog tib yam li electrolysis ntawm ntsev dej kom tau sodium hydroxide es tsis txhob sodium hlau.
Yuav tsum tau them sai sai rau qhov tsis zoo oxidation nto nyhuv ntawm tuag-casting aluminium alloy
Casting aluminium alloys thiab tuag castings feem ntau muaj cov ntsiab lus silicon siab, thiab cov yeeb yaj kiab anodized yog xim tsaus; Nws yog tsis yooj yim sua kom tau ib qho xim tsis muaj xim thiab pob tshab oxide zaj duab xis. Nrog rau qhov nce hauv cov ntsiab lus silicon, cov xim ntawm cov yeeb yaj kiab anodized hloov ntawm lub teeb grey mus rau tsaus grey. Yog li ntawd, cam khwb cia aluminium alloys tsis haum rau anodizing.
Txawm li cas los xij, cov txiaj ntsig ntawm anodic oxidation kev kho mob ntawm zinc alloy tuag castings yuav tsis zoo tshwj xeeb, tus nqi tawm los tsawg heev, thiab kev kho anodic oxidation kuj yog cov txheej txheem cumbersome heev. Zinc alloy tuag castings feem ntau siv electroplating nto kho txheej txheem.
Xaus
(1) Kev kho deg ntawm aluminium alloy feem ntau yog anodized, uas tsis haum rau electroplating.
(2) Cov nyhuv anodic oxidation ntawm aluminium alloy tuag castings yog qhov tsis zoo, thiab electroplating feem ntau yog siv rau kev kho deg.
(3) Kev kho saum npoo ntawm zinc alloy tuag casting yog electroplating, uas tsis haum rau anodizing.
TS tuaj yeem muab tauanodized aluminium ntawvnyob rau hauv ib qho kev nthuav dav ntawm qhov ntau thiab tsawg, qib aluminium alloy, xim, thiab lwm yam. Piv txwv li, peb tuaj yeem muab 5052 anodized txhuas ntawv, 6061 anodized txhuas ntawv, thiab lwm yam.
Anodized Aluminium Sheet
