1. Mfundo Yaikulu: Kutembenuza Ma Electroplating
Kupukuta ndi electrochemical kusungunuka kwa chitsulo chogwirira ntchito mu bafa ya electrolyte kuti achotse zinthu pamwamba, kuchepetsa kuuma, ndikupanga mapeto owala komanso osasunthika.
Taganizirani izi ngatizosiyana ndi electroplating:
● Kupaka ma elekitiroma: Chogwirira ntchito ndi cathode ($-$$) → Ma ayoni achitsulo ochokera ku mbale ya yankho kupita pamwamba.
● Kupukuta ndi magetsi: Chogwirira ntchito ndi anode ($+$) → Maatomu achitsulo amasungunuka ndikuchotsedwa pamwamba kukhala yankho.
2. Chinsinsi cha Kusalala: Gawo Lopingasa la Malire
Ngati kusungunuka kwa anodic kungochotsa chitsulo, kumangodula pamwamba pake. Kodi kumachikonza bwanji? Yankho lili mu gawo la malire okhuthala, lingaliro lofunika kwambiri pa chiphunzitso cha electropolishing.
● Kapangidwe: Pamene ma ayoni achitsulo akusungunuka kuchokera ku anode, amasonkhana mu electrolyte yopyapyala yomwe ili pafupi ndi pamwamba pa workpiece.
● Kuchuluka kwa Kukhazikika: Chigawochi chimakhala chodzaza kwambiri ndi ma ayoni achitsulo, zomwe zimawonjezera kukhuthala kwake komanso kukana kwamagetsi.
● Njira Yoyang'aniridwa ndi Kufalikira: Kuchuluka kwa kusungunuka sikumachepetsedwanso ndi mphamvu yamagetsi yomwe imagwiritsidwa ntchito kapena momwe zinthu zimayendera, koma ndi momwe ma ayoni achitsulo awa amatha kufalikira kuchokera pamwamba kupita ku electrolyte yambiri.
3. Malo Ocheperako: "Malo Okoma"
Kuti electropolishing igwire ntchito, muyenera kugwira ntchito mkati mwa dongosolo linalake la electrochemical: malire a current plateau.
Mu curve ya polarization (Current Density vs. Voltage), muwona madera osiyanasiyana:
1. Chigawo Chogwira Ntchito (Voteji Yotsika): Mphamvu imawonjezeka ndi magetsi. Kudula kosalamulirika kumachitika. Zotsatira zake: Kutsika kwa matope ndi kutha kosalala.
2. Chigawo Chopanda Mphamvu/Chigawo Chapamwamba (Voteji Yabwino Kwambiri)Mphamvu yamagetsi imakhalabe yokhazikika ngakhale magetsi akukwera. Gawo lokhuthala limalamulira bwino kufalikira kwa magetsi. Zotsatira zake: Kupukuta kwamagetsi kwenikweni, kusalala kwambiri, komanso kuwala.
3. Chigawo Chosasinthika (Voteji Yaikulu): Mphamvu yamagetsi imakweranso. Kusintha kwa mpweya ndi kuwonongeka kwa malo (kutuluka kwa maenje, kufalikira kwa mpweya) kumachitika. Zotsatira zake: Kupukuta kwambiri, kuwonongeka.
Lamulo logwirira ntchito: Sungani mphamvu ya selo yomwe imakusungani bwino pa phiri.
4. Magawo ndi Zopinga Zothandiza pa Njira
Kuti mukwaniritse zotsatira za "kuzama kwambiri" pochita, samalani zinthu izi:
● Kutentha: Imawonjezera kuchuluka kwa kufalikira, imachepetsera gawo lokhuthala. Iyenera kusungidwa nthawi zonse ($\pm 2^\circ C$). Yotentha kwambiri → yopaka. Yozizira kwambiri → imafunika mphamvu zambiri, imatambasuka.
● Kuchuluka kwa Masiku Ano: Kawirikawiri 10–50 A/$dm^2$. Imalamulidwa ndi mawonekedwe a zigawo. Yotsika kwambiri pazigawo zofewa.
● Nthawi: Mphindi 2–10 nthawi zambiri. Nthawi yayitali si yabwino nthawi zonse; kupukuta kwambiri kungayambitse kubowola.
● Kapangidwe ka Cathode: Iyenera kuyerekeza mawonekedwe a magawo ovuta kuti isunge kufalikira kwa mphamvu mofanana. "Mphamvu yoponyera" ndi yofooka.
Mavuto Ofala ndi Zomwe Zimayambitsa Electrochemical:
· Kutulutsa mpweya: Kuchuluka kwa kutentha kapena mpweya m'malo osiyanasiyana (dera losasinthika).
· Peel ya lalanje / Kupondaponda: Ikugwira ntchito m'dera logwira ntchito (voltage yotsika kwambiri) kapena electrolyte yodetsedwa (monga ma chloride).
· Kupukuta Kosafanana: Kuyika bwino kwa cathode kapena kusakhazikika bwino kwa electrolyte yambiri (zomwe sizimasokoneza micro-layer yokhuthala koma zimatsitsimutsa kuchuluka kwa kuchuluka kwa madzi ambiri).
Chidule: Kutenga kwa Electrochemical
Kupukuta ndi electropolishing ndi njira yosungunuka ya anodic yomwe imatenga mayendedwe ambiri. Kutha kosalala sikutheka mwa "kuwotcha" nsonga koma mwa kukhazikitsa gawo lokhazikika, lolimba la malire lomwe limapanga kuchuluka kwa kusungunuka pamalo omwe akutuluka. Kugwira ntchito molondola pa plateau yocheperako yamagetsi, yokhala ndi electrolyte ya acid yokonzedwa, kumapanga malo osalala, oyera, komanso osasunthika kuposa njira ina iliyonse yamakina.
Nthawi yotumizira: Epulo-09-2026