I-galvanizing ibhekisela kubuchwepheshe bonyango lomphezulu wokubeka umaleko we-zinc kumphezulu wesinyithi, i-alloy okanye ezinye izinto ngenjongo yobuhle kunye nokuthintela umhlwa.Eyona ndlela iphambili yi-dip galvanizing eshushu.
I-Zinc iyanyibilika kwiiasidi kunye nealkali, ngoko ibizwa ngokuba yi-amphoteric metal.Zinc itshintsha kancinci emoyeni owomileyo.Emoyeni ofumileyo, umphezulu we-zinc uya kwenza ifilimu eshinyeneyo ye-zinc carbonate film.Iqulethe i-sulphur dioxide, i-hydrogen sulfide kunye ne-Marine atmosphere, i-zinc corrosion. ukuxhathisa kubi, ngakumbi kubushushu obuphezulu kunye nokufuma okuphezulu okuqulethe umoya we-asidi ye-organic, ukutyabeka kwe-zinc kulula ukugqwala. yi -0.76v. Kwi-matrix yensimbi, i-zinc yokugqoka i-anodic coating, eyona nto isetyenziselwa ukuthintela ukubola kwentsimbi. Ukusebenza kwayo okukhuselekileyo kunobudlelwane obukhulu kunye nobukhulu be-coating.Iipropati zokukhusela kunye nokuhlobisa i-zinc coating inokuphuculwa kakhulu ngokugqithiswa, ukuhlambalaza okanye ukugubungela nge-agent ekhuselayo.
Umgaqo kukuba ngokukhawuleza oxidize umphezulu intsimbi kunye neemveliso zentsimbi ukwenza ifilimu oxide eshinyeneyo umaleko olukhuselayo.Zimbini iindlela eziqhele ukusetyenziswa mnyama: zemveli ukufudumeza alkaline blackening kunye mnyama kade kwiqondo lokushisa.Kodwa isiphumo ubushushu begumbi inkqubo yokwenza mnyama kwintsimbi yekhabhoni ephantsi ayilunganga.Kungcono ukwenza intsimbi ye-A3 ibe mnyama ngealkali.I-alkalescent blackening yahlulahlulwe, ibe mnyama kwakhona kunye nokwahlukana okubini okumnyama.Owona mkhulu Amacandelo otywala obumnyama yi-sodium hydroxide kunye ne-nitrite yesodium.Ubushushu obufunekayo ukuze kumnyama kubanzi, ukusuka malunga ne-135 degrees Celsius ukuya kwi-155 degrees Celsius, kwaye ufumana ubuso obuhle, kodwa kuthatha ixesha elithile. ihlawulwe umgangatho umhlwa kunye nokususwa ioli phambi kokuba mnyama workpiece, kunye nokuntywiliselwa ioli passivation emva blackening.Umgangatho blackening kaninzi iyahluka kwezi nkqubo.Metal Ulwelo lwamayeza "i-bluing" luthatha i-alkaline oxidation okanye i-asidi oxidation.Inkqubo yokwenza ifilimu ye-oxide kwindawo yesinyithi ukuthintela ukubola kuthiwa "i-bluing". Umaleko ubukhulu becala yi-ferric oxide kwaye umaleko ongaphakathi yi-ferrous oxide.
Iibholiti zamandla aphezulu zisetyenziswa ngokubanzi kumalungu abalulekileyo, ngokuxhomekeke kuxinzelelo olukhulu kunye ne-shear.Isinyathelo sokugqibela kwi-bolt processing yonyango lobushushu, eyaziwa ngokuba yi-quenching, ukunyusa amandla eebhotshi.Nangona kunjalo, i-hydrogen embrittlement iyenzeka ngokulula kwinkqubo iibholiti ze-galvanizing.I-Hydrogen embrittlement idla ngokubonakaliswa ngokulibaziseka ukuphuka.Oku kunciphisa amandla eebholiti eziphezulu.Ngoko ke, umphezulu omnyama eveliswa ngonyango lokufudumeza kwakhona kweebholiti zamandla aphezulu yifilimu ene-oxidation ezinzileyo.Ayiyi kugqwala xa ingadibananga nezinto ezitshabalalisayo.
https://www.china-bolt-pin.com/
Ixesha lokuposa: Sep-09-2019