Cov ntsiab lus tseem ceeb yuav tsum tau them sai sai rau thaum electroplating cov khoom sib txawv ua ke

Feem ntau hais lus, electroplating yog nqa tawm ntawm tus kheej qhov chaw, thiab raws li cov txheej txheem kawg ntawm kev tsim khoom, cov khoom sib txuas yog txuas rau hauv cov khoom sib xyaw ua ntej kev kho electroplating yog nqa tawm. Feem ntau phau ntawv qhia feem ntau hais txog electroplating ntawm cov khoom sib dhos, thiab hauv qee cov qauv, electroplating ntawm cov khoom sib dhos yog txwv tsis pub. Thaum electroplating ntawm cov khoom sib dhos yog tsim nyog, nws yog ib qho tsim nyog yuav tau sib tham nrog cov txheej txheem los tsim cov kev pom zoo ntawm kev sib koom ua ke.
1, Tseem muaj ntau qhov sib dhos uas yuav tsum tau electroplated hauv lub Hoobkas tsim, thiab yog vim li cas yooj yim. Hloov los ntawm electroplating ntawm ib qho chaw rau ib zaug electroplating ntawm cov khoom sib dhos yuav ua rau lub voj voog ntau lawm thiab txuag nqi. Tsis tas li ntawd, electroplating ntawm cov khoom sib dhos yog qhov tsim nyog nyob rau hauv qee cov txheej txheem ntawm kev ua cov khoom.
Thaum electroplating los ua ke Cheebtsam, txhawm rau hloov kho txhua yam rau cov tshuaj lom neeg thiab cov tshuaj electrochemical, cov kev daws teeb meem tsim nyog yuav tsum tau siv, thiab cov txheej txheem kev ua haujlwm kuj tseem ceeb heev. Tsis tas li ntawd, kev kho mob ua ntej ua ntej electroplating yog qhov tseem ceeb heev. Yog tias cov ntaub ntawv ntawm txhua feem ntawm lub rooj sib txoos yog tib yam, cov txheej txheem electroplating tuaj yeem ua tiav raws li cov khoom siv no, tab sis cov txheej txheem sib dhos thiab cov txheej txheem ntawm cov khoom tseem yuav tsum tau xav txog. Yog hais tias cov ntaub ntawv ntawm txhua yam ntawm lub rooj sib txoos sib txawv, thaum lub sij hawm electroplating, vim muaj cov yam ntxwv ntawm electrochemical sib txawv ntawm cov ntaub ntawv, cov kev daws yog nyuaj rau hloov mus rau txhua lub Cheebtsam, ua rau ntau heev corrosion ntawm cov khoom los yog hlau ions los pauv thiab precipitate nyob rau hauv cov khoom. ntu. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau ua tib zoo xav txog qhov kev hloov pauv ntawm cov kev daws teeb meem, thiab cov txheej txheem yuav tsum tau coj mus rau hauv tus account txhua yam.
2, Cov hauv qab no yog ib qho piv txwv ntawm cov khoom sib xyaw ua ke tsim los ntawm kev sib txuas cov hlau nrog lwm cov ntaub ntawv
1. Cov khoom siv tooj liab hauv kev sib dhos
Roj tshem tawm thiab etching tuaj yeem ua raws li cov txheej txheem tooj liab. Txhawm rau tshem tawm cov tooj liab ions uas tau pauv thiab nag los ntawm cov khoom hlau, yuav tsum muaj passivation, ua raws li kev xeb tsis muaj zog thiab electroplating hauv tib neeg lub tank. Txhawm rau txhim kho qhov ci ntsa iab, tshuaj polishing ntawm cov khoom sib xyaw tuaj yeem ua tiav, tab sis cov kev daws teeb meem tshwj xeeb yuav tsum tau siv los hloov kho cov haujlwm sib txawv ntawm cov hlau thiab tooj liab. Cov nram qab no polishing thiab passivation daws yuav siv tau.
(1) Cov kua dej polishing yog:
Phosphoric acid 70.5 feem pua ​​-93.6 feem pua
Nitric acid 29.5 feem pua ​​-6.4 feem pua
Qhov kub thiab txias, 1-2 feeb
(2) Passivation tom qab polishing, cov tshuaj passivation yog:
Chromic acid 25-30 grams
5-8 milliliters ntawm sulfuric acid
Chav tsev kub, 2-4 feeb
Ua kom tsis muaj zog corrosion (10 feem pua ​​​​ntawm hydrochloric acid) ntxuav dej thiab tom qab ntawd electroplate rau tib neeg lub tank
2. Muaj cov nickel plated stainless hlau qhov chaw hauv lub rooj sib txoos
Stainless hlau muaj ib tug muaj zog nyiam passivate, thiab tsis muaj kev kho tshwj xeeb, nws yog ib qhov nyuaj rau tau ib tug ruaj khov txheej txheej. Thaum muaj stainless hlau qhov chaw nyob rau hauv lub rooj sib txoos, electrogalvanizing activation yuav tsum tau. Ntawd yog, tom qab soaking hauv cov concentrated hydrochloric acid rau 1-3 feeb, galvanizing yog nqa tawm tam sim ntawd rau 1-2 feeb thiab zinc raug tshem tawm. Qhov kev ua haujlwm no rov ua dua ob zaug, thiab tom qab ntawd electroplating yog nqa tawm hauv tib neeg da dej. Yog tias lub rooj sib txoos yuav tsum tau nickel plated, npib tsib xee tuaj yeem ua ntej plated rau 2-4 feeb tom qab soaking hauv concentrated HCI. Yog tsis muaj kev tu, zoo tib yam npib tsib xee plating tuaj yeem nqa tawm tam sim ntawd. Thaum muaj cov nickel plated Cheebtsam nyob rau hauv lub rooj sib txoos, cov pa tshuaj degreasing tuaj yeem siv tau, thiab kev ua kom zoo thiab ua ntej nickel plating tuaj yeem ua raws li cov txheej txheem stainless hlau.
3. Muaj cov khoom siv lead-tin nyob rau hauv lub rooj sib txoos
Cov hlau lead-tin nyob rau hauv lub rooj sib txoos muaj xws li tin plated qhov chaw, txhuas plated qhov chaw, txhuas qhov chaw, thiab cov khoom muag muag (siv cov hlau lead-tin alloy solder), tag nrho cov uas yog amphoteric hlau nrog tsis zoo electrode muaj peev xwm thiab yog yooj yim soluble nyob rau hauv acidic thiab alkaline daws. Rau cov rooj sib txoos uas muaj cov khoom zoo li no, cov alkalis uas muaj zog thiab cov kua qaub yuav tsum tsis txhob siv rau kev kho mob ua ntej, thiab cov kuab tshuaj organic (gasoline, trichloroethylene, thiab lwm yam) yuav tsum tau siv rau degreasing ua ntej. Kev tshem tawm cov roj tshuaj thiab cov roj electrolytic tshem tawm yuav tsum tsis muaj zog alkaline daws, nrog rau qhov kub tsis tshaj 65 degree, thiab lub sijhawm yuav tsum luv li sai tau. Yog tias tsim nyog, chav tsev kub hlau ntxuav cov neeg ua haujlwm lossis cov khoom siv ntau yam alkaline tshem tawm tuaj yeem siv los pab txhuam hniav. Lub LJ-7 thiab LJ-9 degreasing cov neeg ua haujlwm tsim los ntawm Xiamen Lejiang Technology Institute tuaj yeem siv rau tib lub sijhawm rau cov khoom sib xyaw welded nrog tooj dag, zinc raws li alloys, thiab txhuas alloys, nce tus nqi ntawm cov khoom plated los ntawm 70. mus txog 95 feem pua.
Cov khoom siv lead ua tuaj yeem ua nrog cov tshuaj uas muaj 120-250nIlL/L ntawm fluoroboric acid (42 feem pua) ntawm chav tsev kub. Ordinary dilute acid tov yuav siv tau rau 10-155 tin qhov chaw ntawm chav tsev kub rau 5-10S. Lead tin welding Cheebtsam yuav tsum tau muab ntxuav ntawm solder flux ua ntej, tom qab ntawd los ntawm kev tshem tawm cov roj thiab acid immersion. Lub sijhawm rau kev tshem tawm cov roj thiab cov kua qaub yuav tsum tsis txhob ntev dhau, txwv tsis pub cov dej ntws tuaj yeem tshwm sim. Tom qab kev kho mob ua ntej, cov khoom sib xyaw saum toj no tuaj yeem ncaj qha plated nrog tooj liab thiab tom qab ntawd lwm yam hlau. Thaum polishing yuav tsum tau tom qab plating, nws yuav tsum tau ua nyob rau hauv qis ceev thiab tsis tshua muaj siab los tiv thaiv deformation los yog tev ntawm txheej.
4. Muaj castings hauv lub rooj sib txoos
Cov hom kev sib xyaw ua ke muaj xws li cam khwb cia hlau qhov chaw thiab zinc alloy tuag-casting qhov chaw. Hmoov metallurgy qhov chaw, vim lawv cov microstructure zoo sib xws, kuj tuaj yeem muab faib rau hauv pawg no. Nws cov yam ntxwv yog tias cov khoom muaj ntau qhov pores, thiab thaum lub sijhawm kho ua ntej thiab electroplating, cov tshuaj yuav nkag mus rau hauv cov pores, ua rau nws nyuaj rau kev ntxuav thiab cuam tshuam rau qhov zoo ntawm electroplating. Hom kev sib dhos no yuav tsum tau mechanically leveled thiab ci ua ntej sib dhos. Tom qab sib dhos, kev kho sealing yog nqa tawm, uas yog, immersion nyob rau hauv molten zinc stearate (135-180 degree) rau 20 mjll, ua raws li sandblasting thiab mechanical polishing.
5. Muaj cov khoom yas hauv lub rooj sib txoos
Hom kev sib dhos no sib txuas cov hlau thiab yas siv txoj kev pouring. Cov khoom yas yuav tsum tsis txhob muaj pob txha los yog khawb, thiab yuav tsum tsis muaj burrs, inclusions, los yog unglued gaps nyob rau hauv hlws ris ntawm hlau thiab yas. Yuav tsum tsis txhob muaj cov yas residue rau saum npoo ntawm cov hlau. Kev ntxhov siab yuav tsum tau ua ntej electroplating. Kev kub siab thiab muaj zog oxidizing kev daws teeb meem yuav tsum zam thaum kho ua ntej. Siv cov txheej txheem txheej txheej rau cov khoom yas, thiab tom qab ntawd electroplate raws li cov txheej txheem sib thooj. Tshem tawm cov zinc stearate ntau dhau ntawm qhov chaw los ntawm cov ntawv xuab zeb polishing lossis ntoo nti dov, thiab tom qab ntawd siv cov txheej txheem rau degreasing thiab etching, tab sis tsis txhob muaj zog corrosion thiab ntxiv dag zog rau kev tu. Tom qab ntawd ua ntej plating hauv cyanide tooj liab plating tov rau 5-10 feeb tuaj yeem siv rau electroplating lwm cov hlau txheej.