1. Hom Pure Copper Surface Oxidation
oxidation ntawm ntshiab tooj liab feem ntau yog muab faib ua ob pawg: ntuj oxidation thiab ceev oxidation.
Ntuj oxidation tshwm sim thaum tooj liab ntshiab yog nyob rau hauv kev sib cuag nrog huab cua ntawm chav tsev kub. Nws reacts nrog oxygen nyob rau hauv cov huab cua los ua ib tug nyias, ntom cuprous oxide (Cu₂O), uas yog reddish-xim av thiab muaj ib tug tej yam kev tiv thaiv ntawm lub sab hauv tooj liab matrix, tiv thaiv oxidation ntxiv. Hom oxidation no qeeb thiab feem ntau tsis ua rau cov khoom puas tsuaj loj.
Accelerated oxidation yog tshwm sim los ntawm qhov hnyav ib puag ncig, xws li cov av noo siab, kub siab, raug rau cov roj corrosive (xws li sulfur dioxide, ammonia) los yog kev sib cuag nrog cov tshuaj acidic / alkaline. Lub sijhawm no, oxide zaj duab xis yuav thicken thiab dhau los ua xoob, thiab txawm tsim cov tooj liab oxide dub (CuO) lossis ntsuab tooj liab hydroxide carbonate (patina). Hom oxidation no yuav ua rau cov khoom siv tooj liab puas thiab cuam tshuam rau nws cov kev ua tau zoo.
2. Kev kho cov txheej txheem rau Pure Copper Surface Oxidation
Kev kho mob ntawm oxidized ntshiab tooj liab nto yuav tsum tau ua raws li qib ntawm oxidation. Cov hauv qab no yog peb txoj hauv kev thiab cov tswv yim, uas tsim nyog rau qib oxidation sib txawv thiab daim ntawv thov scenarios.
2.1 Mechanical Polishing Method (Zoo rau me me mus rau nruab nrab Oxidation)
Txoj kev no feem ntau yog siv los tshem tawm cov yeeb yaj kiab oxide nyias ntawm qhov chaw ntawm cov tooj liab ntshiab, uas yooj yim thiab yooj yim rau kev khiav lag luam, thiab tsis tas yuav tsum muaj cov tshuaj reagents. Cov cuab yeej siv feem ntau suav nrog cov ntawv xuab zeb (los ntawm ntxhib mus rau nplua), daim ntaub polishing, polishing log thiab lwm yam. Thaum ua haujlwm, ua ntej siv cov ntawv xuab zeb ntxhib los maj mam zom cov oxidized nto kom tshem tawm cov txheej oxide xoob, tom qab ntawd siv cov ntawv xuab zeb zoo los txhuam rov qab ua kom lub ntsej muag du, thiab thaum kawg siv daim ntaub polishing los so saum npoo kom rov qab cov lus ntawm cov tooj liab ntshiab.
Nws yuav tsum tau muab sau tseg tias kev sib tsoo quab yuam yuav tsum tsis tu ncua thaum lub sijhawm ua haujlwm kom tsis txhob khawb qhov tooj liab; Tom qab polishing, qhov saum npoo yuav tsum tau ntxuav nrog dej huv kom tshem tawm cov khib nyiab polished, thiab tom qab ntawd qhuav nrog daim ntaub qhuav kom tsis txhob oxidation theem nrab.
2.2 Txoj kev ntxuav tshuaj (tsim rau nruab nrab rau oxidation hnyav)
Rau cov txheej tuab thiab tawv tawv oxide, tshuaj ntxuav tau zoo dua. Txoj kev no siv cov kua qaub-puag reagents los ua rau cov txheej txheem oxide, yaj cov oxide thiab rov ua dua qub ntawm cov tooj liab ntshiab. Nws yuav tsum raug sau tseg tias cov tshuaj reagents yog corrosive, yog li kev tiv thaiv kev tiv thaiv (xws li hnav hnab looj tes thiab tsom iav) yuav tsum tau ua thaum ua haujlwm.
Cov qauv kev tu ntau: sib tov dilute sulfuric acid (concentration 5% -10%) nrog ib qho me me ntawm corrosion inhibitor, tsau cov oxidized tooj liab hauv cov tshuaj rau 5-10 feeb, tshem tawm tom qab txheej oxide yaj, yaug kom huv si nrog dej huv, thiab qhuav tam sim ntawd. Rau cov tawv oxides ntau dua, ib qho me me ntawm hydrogen peroxide tuaj yeem muab ntxiv rau hauv cov tshuaj txhawm rau txhim kho cov nyhuv tu. Nws yog nruj me ntsis txwv tsis pub siv concentrated acid, uas yuav corrode tooj liab matrix thiab ua rau irreversible kev puas tsuaj.
2.3 Electrolytic Polishing Method (Suitable rau High -Cov Khoom Copper Precision)
Txoj kev no yog tsim rau siab - precision tooj liab qhov chaw (xws li cov khoom siv hluav taws xob, cov cuab yeej precision) uas yuav tsum tau ua kom tiav qhov siab. Nws siv electrolysis tshem tawm cov oxide txheej thiab polish qhov chaw, ua rau cov tooj liab nto smoother thiab ntau ci. Kev ua haujlwm tshwj xeeb yog muab cov oxidized tooj liab rau hauv cov tshuaj electrolytic (feem ntau yog cov tshuaj sib xyaw ntawm phosphoric acid thiab sulfuric acid), txuas cov electrode zoo ntawm lub hwj huam mov rau tooj liab, thiab cov electrode tsis zoo rau lub phaj cathode, thiab tswj cov tam sim no thiab voltage rau electrolysis. Tom qab electrolysis, tshem tawm ib feem, yaug nrog dej huv thiab qhuav.
