Ngethuba lokuhanjiswa kwamandla, inqaba yensimbi yinto ebaluleke kakhulu. Ngethuba lokuveliswa kweemveliso zetsimbi zensimbi, inkqubo yokuvelisa i-hot-dip galvanizing ngokuqhelekileyo yamkelwa phezu komhlaba ukukhusela umgangatho weemveliso zetsimbi kwi-corrosion yomoya wangaphandle kunye neendawo ezahlukeneyo. Ukusetyenziswa kwenkqubo ye-galvanizing ye-hot-dip inokufikelela kwi-anti-corrosion effect. Ngeemfuno eziphezulu zokuhanjiswa kwamandla, iimfuno zenkqubo yokuveliswa kweemveliso zetsimbi ezinamakha nazo ziphezulu.
(1) Umgaqo osisiseko wokugalela idiphu eshushu
Ukugalela idiphu eshushu, ekwabizwa ngokuba yi-hot dip galvanizing, yenye yezona ndlela zibalaseleyo zokugquma zokukhusela intsimbi engaphantsi komhlaba. Kwi-zinc engamanzi, emva kokuba i-workpiece yentsimbi iye yanyangwa ngokwasemzimbeni nangokwekhemikhali, i-workpiece yentsimbi intywiliselwa kwi-zinc etyhidiweyo kunye nobushushu be-440 ℃ ~ 465 ℃ okanye ngaphezulu kunyango. I-substrate yensimbi isabela kunye ne-zinc etyhidiweyo ukwenza umaleko wegolide we-Zn Fe kunye ne-zinc ecocekileyo kwaye igqume yonke indawo yentsimbi yokusebenza. Umphezulu ofakwe igalvanized unokuqina okuthile, unokumelana nokukhuhlana okukhulu kunye neempembelelo, kwaye unokudibanisa okuhle kunye ne-matrix.
Le ndlela yokucoca ayinayo kuphela ukuxhathisa kwe-corrosion ye-galvanizing, kodwa inomaleko we-alloy we-Zn Fe. Ikwanayo nokumelana ne-corrosion eyomeleleyo engenakufaniswa ne-galvanizing. Ke ngoko, le ndlela yokucwenga ifaneleke ngakumbi kwiindawo ezomeleleyo ezonakalisayo ezifana neasidi eyomeleleyo, ialkali kunye nenkungu.
(2) Iimpawu zokusebenza ze-galvanizing yediphu eshushu
Inomaleko we-zinc angqingqwa kwaye axineneyo kwindawo yentsimbi, enokuthintela ukudibana kwe-substrate yentsimbi kunye naso nasiphi na isisombululo somhlwa kunye nokukhusela i-substrate yensimbi ekungcoleni. Kwi-atmospheric jikelele, i-zinc oxide enqabileyo kunye ne-dense layer ye-zinc oxide yenziwa phezu komgangatho we-zinc layer, okunzima ukuyichitha emanzini, ngoko idlala indima ethile ekukhuseleni i-matrix yensimbi. Ukuba i-zinc oxide kunye nezinye izinto ezikwi-atmospheric zibumba i-zinc salts ezingaxutywanga, i-anti-corrosion effect ilungile ngakumbi.
Emva kwe-galvanizing ye-hot-dip, intsimbi inomaleko we-alloy we-Zn Fe, ohlangeneyo kwaye unokumelana ne-corrosion ekhethekileyo kwimoya yenkungu yetyuwa yaselwandle kunye nomoya wezoshishino. Ngenxa yokubambisana okuqinileyo, i-Zn Fe ixubile kwaye inokumelana okuqinileyo nokunxiba. Ngenxa yokuba i-zinc ine-ductility efanelekileyo kunye ne-alloy layer ifakwe ngokuqinileyo kwi-substrate yensimbi, i-hot-dip workpiece ye-galvanized inokwakheka ngokubetha okubandayo, ukuqengqeleka, umzobo wocingo, ukugoba, njl.
Emva kokutshisa i-galvanizing, i-workpiece yensimbi ilingana nonyango lwe-annealing, olunokuphucula ngokufanelekileyo iimpawu zomatshini we-substrate yensimbi, ukuphelisa uxinzelelo lwentsimbi yokusebenza ngexesha lokubumba kunye ne-welding, kwaye ilungele ukuguqula i-workpiece yensimbi.
Umphezulu we-workpiece yentsimbi emva kokutshisa i-galvanizing ikhanya kwaye intle. Umaleko we-zinc ococekileyo ngowona maleko we-zinc weplastiki kwi-hot-dip galvanizing. Iimpawu zayo zifana ne-zinc ecocekileyo, kwaye ine-ductility, ngoko iguquguqukayo.
Ixesha lokuposa: Aug-26-2022
