Inqubo yokwakheka kongqimba olunamanzi okushisa ashisayo yinqubo yokwenza ingxubevange ye-iron-zinc phakathi kwe-substrate yensimbi kanye nongqimba lwezinc oluhlanzekile lwangaphandle.I-iron-zinc alloy layer yakheka phezu kwendawo yokusebenza ngesikhathi sokushisa okushisayo, ukuze insimbi ne-zinc layer ehlanzekile isondelene kakhulu.Inhlanganisela enhle.Inqubo yamakhoyili amakhulu weucingo lukathayelaingachazwa kalula ngokuthi: lapho i-workpiece yensimbi icwiliswa oketshezini lwezinki oluncibilikisiwe, isixazululo esiqinile se-zinc ne-α-iron (isikhungo somzimba) siqala ukwakhiwa kusixhumi esibonakalayo.Lena ikristalu eyakhiwe ngokuncibilikisa ama-athomu e-zinc kunsimbi eyisisekelo esimweni esiqinile.Ama-athomu amabili ensimbi ahlanganisiwe, futhi ukukhangana phakathi kwama-athomu kuncane kakhulu.
Ngakho-ke, lapho i-zinc ifinyelela ukugcwala esixazululweni esiqinile, ama-athomu e-zinc ne-iron asakazekela kwelinye, futhi ama-athomu e-zinc asakazekela ku (noma angena ngaphakathi) ku-matrix yensimbi afuduka ku-matrix lattice, kancane kancane akhe ingxubevange ngensimbi, bese isakaza phakathi Insimbi oketshezini oluncibilikisiwe lwezinki yakha inhlanganisela ye-intermetallic FeZn13 enezinki, ishona phansi ebhodweni elishisayo lediphu, bese iba i-zinc slag.Lapho i-workpiece isuswa kusixazululo sokucwilisa i-zinc, kwakheka ungqimba oluhlanzekile lwe-zinc phezulu, okuyi-crystal ene-hexagonal, futhi okuqukethwe kwayo kwensimbi akukho ngaphezu kuka-0.003%.
I-hot-dip galvanizing, eyaziwa nangokuthi i-hot-dipgalvanizing, kuyindlela lapho izingxenye zensimbi zicwiliswa ku-zinc encibilikisiwe ukuze zithole ukunamathela kwensimbi.Ngokuthuthuka okusheshayo kokudluliswa kwamandla kagesi aphezulu, ezokuthutha, kanye nokuxhumana, izidingo zokuvikela izingxenye zensimbi ziya ngokuya ziba phezulu, kanye nesidingo sokugalela ama-hot-dip galvanizing naso siyakhula.Ngokuvamile ukujiya kongqimba oluvulwe nge-electro-galvanized luyi-5-15 μm, kuyilapho ukujiya kwekhoyili enkulu yocingo longqimba ngokuvamile kungaphezu kuka-35 μm, ngisho nokuphakama kufinyelele ku-200 μm.I-hot-dip galvanizing inokwemboza kahle, ukunamathela okuminyene, futhi akukho okuhlanganisiwe kwemvelo.
Njengoba sonke sazi, indlela yokugqwala kwe-zinc anti-atmospheric ihlanganisa ukuvikelwa kwemishini kanye nokuvikelwa kwe-electrochemical.Ngaphansi kwezimo zokugqwala komkhathi, kukhona i-ZnO, i-Zn(OH)2 namafilimu ayisisekelo e-zinc carbonate okuvikela ebusweni bongqimba lwezinc, anciphisa ukugqwala kwe-zinc ngokwezinga elithile.Isendlalelo sokuqala sefilimu evikelayo (eyaziwa nangokuthi ukugqwala okumhlophe) sonakalisiwe, futhi kuzokwakhiwa ungqimba lwefilimu olusha.
Lapho ungqimba lwe-zinc lonakele kakhulu futhi lufaka engozini ingxenye yensimbi, i-zinc izovikela i-substrate ngokwe-electrochemical, amandla ajwayelekile e-zinc ngu-0.76V, kanti amandla ajwayelekile ensimbi ngu-0.44V.Uma i-zinc ne-iron zakha ibhethri elincane, i-zinc iyancibilika njenge-anode, futhi insimbi Ivikelwe njenge-cathode.Ngokusobala, i-hot-dip galvanizing ingcono kune-electro-galvanizing ekwazini kwayo ukumelana nokugqwala komkhathi wensimbi eyisisekelo.
Isikhathi sokuthumela: 14-06-23