Kufakwe amagalani
Ishidi elinamekwe nge-Zinc elinweba impilo yomkhiqizo futhi lisize ekuvimbeleni ukugqwala.Ngokubonisa ukushisa okukhulu nokubukeka okukhangayo, ilungele ukwakhiwa kwezakhiwo zezimboni, ama-silo, izinqolobane, phakathi kwezinye izinhlelo zokusebenza.inikela ekuboniseni ukushisa.
Ishidi elinothayela
Ishidi likathayela elingunxande elinokumelana okuphezulu nokugqwala, lilungele ukwakhiwa kophahla kanye nama-facade wezimboni.Ngempilo ende ewusizo, imelana nezindawo ezinomswakama futhi
Ukufakwa uthayela kuyindlela eyongayo nephumelelayo yokuvimbela ukugqwala kwensimbi, futhi ubukhulu bensimbi ethathiwe ngokuvamile bungu-0.35 kuya ku-3 mm.Igama lesiNgisi elithi "galvanizing" lisho ukuthi ungqimba olunamanzi lungavikela ipuleti lensimbi ngokwe-electrochemical.Ngo-1742, i-French Meloman (i-Melomin) yafunda ngempumelelo indlela yokufaka i-hot-dip galvanizing.Ngo-1836, i-French Sorel (Sorel) yasebenzisa indlela yokufaka i-hot-dip ekukhiqizeni izimboni.Ngo-1837, i-HW Grawford yathola ilungelo lobunikazi lokuphehla i-hot-dip galvanizing ngendlela ye-flux.Ngo-1935, i-American Sendzimir (T. Sendzimir) yahlongoza ukusebenzisa indlela yokunciphisa igesi evikelayo ukuze kuqhume ukucwenga okushisayo kwe-strip steel, eyaziwa ngokuthi "indlela ye-Sendzimir".Ngo-1937, ulayini wokuqala we-Sendzimir oqhubekayo wokufaka i-hot-dip galvanizing wakhiwa e-United States.I-China yaqala ukukhiqiza amashidi afaka uthayela ashisayo e-Anshan ngeminyaka yawo-1940, kwathi ngo-1979, ulayini wokuqala oqhubekayo wokucwilisa oshisayo wensimbi ye-strip wakhiwa e-Wuhan.
Idiphu elishisayo
Kunezinhlobo ezimbili zendlela ye-hot-dip galvanizing kanye nendlela ye-electroplating.Ugqinsi longqimba lwezinki olushisayo luvamise ukuba ngu-60 ~ 300g/m2 (uhlangothi olulodwa), olusetshenziselwa izingxenye ezidinga ukumelana nokugqwala okuqinile.I-electroplated zinc layer yi-10-50g/m2 (uhlangothi olulodwa), olusetshenziselwa kakhulu izingxenye ezipendiwe noma izingxenye ezingapendiwe ezingadingi ukumelana nokugqwala okuphezulu.Indlela ye-hot-dip ihlukaniswe ngendlela ye-flux kanye nendlela yokunciphisa igesi evikelayo ngokusho kwendlela yokwelashwa kwangaphambili.Indlela ye-flux iwukugqugquzela ipuleti lensimbi elincibilikisiwe ukuze kukhishwe ama-oxide ngaphezulu, bese udlula ethangini eligelezayo eliqukethe i-ZnCl2 ne-NH4Cl, bese ufaka ithange le-zinc elincibilikisiwe ukuze lifakwe uthayela.Indlela yokunciphisa igesi evikelayo isetshenziswa kakhulu ekugayeleni i-hot-dip galvanizing ye-strip steel.I-strip steel iqala ukudlula esithandweni sokushisa esishiswa ngamalangabi ukuze ishise uwoyela osele phezulu, futhi ngesikhathi esifanayo, kwakheka ifilimu ye-iron oxide phezulu;Insimbi yesipontshi.Ngemuva kokuthi insimbi ye-strip ebuso bayo buhlanjululwe futhi yenziwa yasebenza ipholiswe ezingeni lokushisa elingaphezudlwana kwele-zinc encibilikisiwe, ingena ebhodweni le-zinc ku-450-460 ° C, futhi isebenzisa ummese womoya ukulawula ukushuba kongqimba lwezinc.Ekugcineni, idluliswa ngesisombululo sechromate ukuze kuthuthukiswe ukumelana nokugqwala okumhlophe.
I-Electroplating
Ngokusho kwesixazululo se-plating esisetshenzisiwe, singahlukaniswa ngendlela ye-alkaline nendlela ye-asidi.Isixazululo se-alkaline plating sinenani eliphezulu, singcolisa imvelo, ukusebenza kahle kokukhiqiza okuphansi, kanye nekhwalithi yokumboza empofu, ngakho empeleni asisetshenziswa.Izingxenye eziyinhloko zesisombululo se-acid plating yi-ZnSO4 · 7H2O, NH4Cl ne-Al2 (SO4) 3 · 18H2O, njll. Nge-zinc ehlanzekile njenge-anode ne-strip steel njenge-cathode, ngaphansi kwesenzo samanje, ipuleti ye-anode ye-zinc iyachithwa. ku-Zn2+ esixazululweni sokucwenga, futhi i-Zn2+ yehliselwa ku-zinc yensimbi ku-cathode futhi ifakwe ebusweni bensimbi yomugqa.I-coating iphathwa ngesisombululo esixubile se-phosphate ne-chromate, esingathuthukisa ukudweba, futhi ubuso beshidi lensimbi ye-electro-galvanized kukhanya futhi bushelelezi, okwakusetshenziswa ikakhulukazi embonini yezimoto esikhathini esidlule.Eminyakeni yamuva nje, ububanzi bokufaka isicelo buye banwetshwa embonini kagesi nezinye izici, okukhuthaze ukuthuthukiswa kwemboni ye-electro-galvanized sheet.Ngawo-1970, amashidi anothayela anohlangothi olulodwa nawo athuthukiswa.
Isikhathi sokuthumela: Mar-10-2022
