1. Puas yog xim txawv thiab Oxidation ntawm Pure Copper Surfaces li qub?
Xim variations thiab oxidation nto ntawm tooj liab ntshiab yog ib txwm thiab inevitable phenomena es tsis zoo tsis xws luag, tshwj xeeb tshaj yog rau uncoated los yog unprotected tooj liab cov khoom xws li daim hlau, strips, tuav, raj, thiab foils. Raws li kev tsim khoom ib txwm muaj, kev thauj mus los, kev cia khoom, thiab cov xwm txheej raug, cov tooj liab ntshiab maj mam ua rau cov khoom hauv ib puag ncig, ua rau muaj kev hloov pauv ntawm cov xim saum npoo, ci, thiab gloss. Cov kev hloov no tsis tas yuav cuam tshuam rau txhua yam khoom, hluav taws xob conductivity, thermal conductivity, lossis formability.
Cov xim me me uas tshwm sim los ntawm dov, annealing, lossis cov txheej txheem ua haujlwm txias kuj tseem muaj. Qhov sib txawv ntawm qhov txias txias, qhov kev taw qhia ntawm cov nplej, qhov roughness ntawm qhov chaw, thiab cov kev ntxhov siab nyob rau hauv yuav ua rau me ntsis unevenness nyob rau hauv tsos. Deg oxidation yuav pom tseeb nyob rau hauv sov, av noo, los yog acidic ib puag ncig. Tsuas yog thaum oxidation hnyav heev -xws li tsim cov xeb xoob, qhov sib sib zog nqus corrosion, los yog cov txheej oxide flaking- nws tuaj yeem suav tias yog qhov txawv txav thiab muaj kev phom sij. Yog li ntawd, nyob rau hauv cov txheej txheem thoob ntiaj teb cov khoom siv thiab kev ua lag luam, kev pom zoo me ntsis hloov xim thiab cov yeeb yaj kiab oxidation nyias nyias tsis suav tias yog qhov tsis lees paub.
2. Vim li cas Ntshiab Copper Deg Discolor?
Lub discoloration ntawm ntshiab tooj liab feem ntau yog tshwm sim los ntawm cov tshuaj tiv thaiv nto thiab lub cev hloov, uas yuav piav tau los ntawm ob qho tib si ib puag ncig thiab metallurgical foundations.
Ua ntej, discoloration yog tsav los ntawm tshuaj lom neeg cov tshuaj tiv thaiv ntawm tooj liab thiab ib puag ncig cua. Tooj liab yog cov hlau uas muaj zog heev uas yooj yim cuam tshuam nrog oxygen, dej vapor, sulfur dioxide, hydrogen sulfide, thiab lwm yam corrosive gases hauv huab cua. Thaum xub thawj, ib txheej nyias, tuab, thiab tiv thaiv txheej ntawm cuprous oxide (Cu₂O) cov ntaub ntawv, uas pom lub teeb daj, lub teeb xim av, los yog lub teeb liab. Nrog rau lub sijhawm ntev, cov oxide txheej thickens thiab maj mam hloov mus rau hauv cupric oxide (CuO), qhia txog xim av lossis xim dub. Nyob rau hauv ib puag ncig uas muaj leej faj, tooj liab reacts tsim tooj liab sulfide (CuS, Cu₂S), ua rau tsaus xim av, grey, los yog txawm dub thaj ua rau thaj. Cov txheej txheem no tau nrawm los ntawm qhov kub thiab txias, cov av noo siab, tshuaj tsuag ntsev, thiab cov khoom ua paug.
Qhov thib ob, cov txheej txheem ua haujlwm cuam tshuam rau xim xim. Annealing kub, tuav lub sij hawm, thiab cua sov cua ncaj qha cuam tshuam rau hom thiab thickness ntawm oxide zaj duab xis. Copper annealed nyob rau hauv ib qho kev tiv thaiv tsis tiav qhov chaw qhia pom pom pom ntau dua. Txias dov, kos duab, lossis polishing hloov qhov roughness thiab reflectivity, tsim kom pom xim txawv. Txawm tias qhov sib txawv me ntsis ntawm kev ua tsis tau tuaj yeem ua rau lub teeb ci tsis sib xws lossis chromatic aberration.
Thib peb, tib neeg yam tseem ceeb thiab kev tuav tsis raug ua kom cov xim tsis zoo. Cov ntiv tes, hws, roj stains, thiab plua plav tawm ntawm qhov chaw muaj cov ntsev, kua qaub, thiab cov organic tebchaw uas dhau los ua qhov chaw corrosion. Cov cheeb tsam no hnov mob sai dua nrog cov pa oxygen thiab noo noo, ua kom pom cov pob los yog cov cim tsaus. Kev ntim khoom tsis raug, kev sib khi tsis zoo, lossis lub sijhawm ntev - khaws cia hauv siab - cov chaw cia khoom ua rau cov av tsis zoo thiab oxidation.
Plaub, ntuj aging thiab lub teeb raug cuam tshuam rau kev hloov xim. Ntev -lub sij hawm lub teeb irradiation txhawb photochemical cov tshuaj tiv thaiv, thickening oxide txheej txheej. Ntau lub hlis lossis xyoo, tooj liab tau nce los ntawm cov xim liab-daj mus rau daj, xim av, ntshav, thiab thaum kawg tsaus xim av lossis dub. Cov txheej txheem zoo - paub patina, xws li cov tooj liab carbonate yooj yim lossis tooj liab sulfate yooj yim, yog cov khoom ruaj khov ntawm qhov ntev - cov tshuaj tiv thaiv huab cua thiab muab kev tiv thaiv ntuj.
3. Cov lus xaus
Hauv cov ntsiab lus, qhov sib txawv ntawm cov xim me ntsis thiab qhov chaw oxidation ntawm cov tooj liab ntshiab yog qhov qub thiab kwv yees tau thiab tsis sawv cev tsis zoo. Discoloration tshwm sim feem ntau los ntawm kev cuam tshuam nrog cov pa oxygen, noo noo, sulfur- muaj cov pa roj, thiab cov kab mob organic, nrog rau kev hloov pauv thiab kev cuam tshuam ib puag ncig.
