I-galvanizing ibhekisa kubuchwepheshe bonyango lomphezulu wokubeka umaleko we-zinc kumphezulu wesinyithi, i-alloy okanye ezinye izinto ngenjongo yobuhle kunye nokuthintela umhlwa.Eyona ndlela iphambili kukutshiza kwediphu.
IZinc iyanyibilika kwiiasidi kunye nealkali, ngoko ke ibizwa ngokuba yiamphoteric metal.Zinc itshintsha kancinci emoyeni owomileyo.Emoyeni ofumileyo, umphezulu wezinc uya kwenza ifilimu eshinyeneyo yezinc carbonate film.Iqulethe sulfur dioxide, hydrogen sulfide kunye neMarine atmosphere, zinc corrosion. ukumelana buthathaka, ingakumbi kubushushu obuphezulu kunye nokufuma okuphezulu okuqulethe umoya we-asidi ye-organic, i-zinc yokwambathisa kulula ukuba i-corroded.I-electrode eqhelekileyo ye-zinc yi-0.76v.Kwi-matrix yensimbi, i-zinc yokugqoka i-coating ye-anodic, eyona nto isetyenziselwa ukuthintela ukubola kwentsimbi.Ukusebenza kwayo okukhuselekileyo kunobudlelwane obukhulu kunye nobukhulu be-coating.Izixhobo ezikhuselayo 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 blacken kade kwiqondo lokushisa.Kodwa isiphumo ubushushu begumbi inkqubo mnyama. kwintsimbi yekhabhoni ephantsi ayilunganga.Kungcono ukwenza intsimbi ye-A3 ibe mnyama ngealkali.I-alkalescent blackening yahlulahlulwe, iphinde ibe mnyama kunye nokwahlukana okumnyama okumnyama.Amalungu aphambili otywala obumnyama yi-sodium hydroxide kunye ne-nitrite yesodium.Ubushushu obufunekayo ukuze kube mnyama ububanzi, ukusuka malunga ne-135 degrees Celsius ukuya kwi-155 degrees celsius, kwaye ufumana indawo entle, kodwa kuthatha ixesha elithile. Kwintsebenzo ebonakalayo, ingqwalasela kufuneka ihlawulwe kumgangatho womhlwa kunye nokususwa kweoli ngaphambi kokuba i-workpiece ibe mnyama, kwaye ukuntywiliselwa kweoli emva kokuba mnyama.Umgangatho wokuba mnyama udla ngokuhluka ngokwezi nkqubo.Metal "bluing" ulwelo lwamayeza luthatha ialkaline oxidatI-ion okanye i-acid oxidation. Inkqubo yokwenza ifilimu ye-oxide kwindawo yesinyithi ukuthintela ukubola ibizwa ngokuba "yi-bluing". umaleko ongaphakathi yi-ferrous oxide.
Iibholiti zamandla aphezulu zisetyenziswa ngokubanzi kumalungu abalulekileyo, ngokuxhomekeke kuxinzelelo olukhulu kunye ne-shear.Isinyathelo sokugqibela kwi-bolt processing kunyango lobushushu, olubizwa ngokuba yi-quenching, ukunyusa amandla eebholiti.Nangona kunjalo, i-hydrogen embrittlement iyenzeka ngokulula kwinkqubo I-galvanizing bolts.I-Hydrogen embrittlement ngokuqhelekileyo ibonakaliswe ngokulibaziseka ukuphuka.Oku kunciphisa amandla eebholiti eziphezulu.Ngoko ke, ubuso obumnyama obuveliswe ngonyango lokufudumeza kwakhona kweebholiti zamandla aphezulu yifilimu ye-oxidation ezinzileyo. ayidibani nezinto ezonakalisayo.
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Ixesha lokuposa: Sep-09-2019