I-galvanizing ibhekisela kubuchwepheshe bokwelapha obungaphezulu bokunamathisela ungqimba lwe-zinc phezu kwensimbi, i-alloy noma ezinye izinto ngenjongo yobuhle nokuvimbela ukugqwala.Indlela eyinhloko i-hot dip galvanizing.
I-Zinc iyancibilika kuma-acids kanye ne-alkali, ngakho ibizwa ngokuthi i-amphoteric metal.I-Zinc ishintsha kancane emoyeni owomile.Emoyeni oswakeme, indawo engaphezulu ye-zinc izokwakha ifilimu eyisisekelo ye-zinc carbonate.Iqukethe i-sulphur dioxide, i-hydrogen sulfide kanye ne-Marine atmosphere, i-zinc corrosion ukumelana kubi, ikakhulukazi ekushiseni okuphezulu kanye nomswakama ophezulu oqukethe i-organic acid emkhathini, ukugcoba kwe-zinc kulula ukugqwala.I-electrode evamile ye-zinc i- -0.76v.Nge-matrix yensimbi, i-zinc coating ingeye-anodic coating, esetshenziselwa ikakhulukazi ukuvimbela ukugqwala kwensimbi.Ukusebenza kwayo okuvikelayo kunobudlelwane obukhulu nobukhulu be-coating.Izakhiwo zokuzivikela nezokuhlobisa ze-zinc coating zingathuthukiswa kakhulu ngokudlula, ukugcoba noma ukugqoka nge-agent evikelayo.
Umgomo uwukukhipha ngokushesha i-oxidize ebusweni bensimbi nemikhiqizo yensimbi ukuze kwakhe ungqimba oluvikelayo lwefilimu ye-oxide eminyene.Kunezindlela ezimbili ezivame ukusetshenziswa kakhulu zokuba mnyama: ukushisisa kwe-alkali okungokwesiko kumnyama kanye nokuba mnyama sekwephuzile ekamelweni lokushisa.Kodwa umphumela wenqubo yokushisa kwegumbi. kwinsimbi ye-carbon steel ayilungile.Kungcono ukwenza insimbi ye-A3 ibe mnyama nge-alkali.I-alkalescent blackening ihlukene kabili, iphinde ibe mnyama futhi ibe nokwehluka okumnyama okubili.Izingxenye eziyinhloko zotshwala obumnyama i-sodium hydroxide ne-sodium nitrite.Izinga lokushisa elidingekayo ukuze kube mnyama ububanzi, kusukela cishe ku-135 degrees Celsius kuya ku-155 degrees Celsius, futhi uthola indawo enhle, kodwa kuthatha isikhathi. Lapho usebenza, kufanele kuqashelwe izinga lokugqwala nokususwa kukawoyela ngaphambi kokuba ucezu lokusebenzela lube mnyama, ukucwiliswa kwamafutha e-passivation ngemva kokuba mnyama.Izinga lokuba mnyama livame ukuhluka ngalezi zinqubo.Uketshezi lomuthi lwe-Metal "bluing" luthatha i-alkaline oxidatI-ion noma i-asidi oxidation.Inqubo yokwenza ifilimu ye-oxide endaweni yensimbi ukuvimbela ukugqwala ibizwa ngokuthi "i-bluing".Ifilimu ye-oxide eyakhiwe phezu kwensimbi emnyama ngemva kokwelashwa "i-bluing", ungqimba lwangaphandle ngokuyinhloko luyi-ferric oxide kanye ungqimba lwangaphakathi luyi-ferrous oxide.
Ama-bolts aphezulu - amandla ngokuvamile asetshenziswa emalungeni abalulekile, ngaphansi kokucindezeleka okukhulu kanye ne-shear.Isinyathelo sokugcina ekucubungulweni kwe-bolt ukwelashwa kokushisa, okuvame ukubizwa ngokuthi ukucisha, ukwandisa amandla ama-bolts.Nokho, i-hydrogen embrittlement kwenzeka kalula ohlelweni ama-galvanizing bolts.I-hydrogen embrittlement ngokuvamile ibonakala ngokuphuka okubambezelekile.Lokhu kunciphisa amandla ama-bolts anamandla aphezulu.Ngakho-ke, ubuso obumnyama obukhiqizwa ukushiswa kabusha kwamabholiti anamandla kuyifilimu ye-oxidation ezinzile.Ngeke igle lapho iqala ukugqwala. ayihlangene nezinto ezonakalisayo.
https://www.china-bolt-pin.com/
Isikhathi sokuthumela: Sep-09-2019