Inkqubo yokwenziwa kwediphu eshushu umaleko wagalvanized uphakathi kwentsimbi yentsimbi kunye nomphandle womaleko we-zinc esulungekileyo, ukwakheka kwenkqubo ye-iron-zinc alloy, umphezulu womsebenzi kwidiphu eshushu xa kusenziwa umaleko we-iron-zinc alloy, ukuze i-iron kunye ne-zinc layer ecocekileyo idibene kakuhle.Inkqubo yocingo olukhulu umqulu ingachazwa nje: xa workpiece yentsimbi kuntywiliselwa kulwelo zinc otyhidiweyo, zinc yokuqala kunye α-intsimbi (umzimba-zimbi) ukunyibilika okuqinileyo kwenziwa kwi-interface.Le yikristale eyenziwe yintsimbi ye-matrix yentsimbi enyibilikisiweyo kunye ne-athomu ye-zinc kwimeko eqinileyo.Iiathom ezimbini zesinyithi zixutywe enye kwenye, kwaye umtsalane phakathi kweeathom umncinci.
Ke ngoko, xa i-zinc ifikelela kwiqondo lokunyibilika ekunyibilikeni okuqinileyo, iziqalelo ezibini ze-zinc kunye neathom zentsimbi ziyasasazeka enye kwenye, kwaye iiathom ze-zinc zisasazeke phakathi (okanye zingene ngaphakathi) kwimatrix yentsimbi ifuduka kwilathisi ye-matrix kwaye ngokuthe ngcembe yenze ingxubevange. ngentsimbi, ngelixa i-iron isasazeke kulwelo olunyibilikisiweyo lwezinki lwenza i-intermetallic ikhompawundi FeZn13 enezinki kwaye itshone emazantsi embiza eshushu-diphu, oko kukuthi, i-zinc slag.Xa i-workpiece isusiwe kwisisombululo se-zinc leaching, umgangatho woluhlu olucocekileyo lwe-zinc lwenziwa, oluyi-crystal ene-hexagonal, kwaye umxholo wayo wentsimbi awukho ngaphezu kwe-0.003%.
I-Hot dip galvanizing, ekwabizwa ngokuba yi-hot dip galvanizing, yindlela yokufumana umaleko wokugquma wesinyithi ngokuntywilisela ilungu lentsimbi kwisisombululo se-zinc esityhidiweyo.Ngophuhliso olukhawulezayo lokuhanjiswa kwamandla ombane aphezulu, ukuthuthwa kunye nokunxibelelana, iimfuno zokukhusela iinxalenye zentsimbi ziba phezulu nangaphezulu, kwaye imfuno ye-galvanizing eshushu-dip nayo iyanda.Ngokuqhelekileyo ubukhulu bomaleko owenziwe nge-electrogalvanized yi-5 ~ 15μm, kwaye umaleko omkhulu wocingo owenziwe ngezinki ungaphezulu kwe-35μm, okanye ukuya kuthi ga kwi-200μm.Idiphu eshushu isakhono sokugquma intsimbi ilungile, iyagquma, akukho kuqukwa kwezinto eziphilayo.
Njengoko sonke siyazi, indlela yokuchasana nokubola kwe-atmospheric ye-zinc ibandakanya ukukhuselwa komatshini kunye nokukhuselwa kwe-electrochemical.Ngaphantsi kwemeko ye-corrosion ye-atmospheric, kukho i-ZnO, i-Zn (OH) i-2 kunye ne-basic zinc carbonate ifilimu ekhuselayo kumphezulu we-zinc layer, kwinqanaba elithile linciphisa ukubola kwe-zinc.Xa le filimu ekhuselayo (ekwabizwa ngokuba yi-white rust) yonakele, ifilimu entsha iya kwenziwa.
Xa i-zinc layer yonakaliswe kakhulu kwaye ibeka engozini i-matrix yensimbi, i-zinc iya kuvelisa ukukhuselwa kwe-electrochemical kwi-matrix, umgangatho osemgangathweni we-zinc ngu-0.76V kunye nomgangatho osemgangathweni wentsimbi ngu-0.44V.Xa i-zinc kunye nentsimbi zenza ii-microbatteries, i-zinc iya kuchithwa njenge-anode, kwaye isinyithi siya kukhuselwa njenge-cathode.Ngokucacileyo, ukuxhathisa kwi-atmospheric corrosion of hot dip galvanizing kungcono kunoko kufakwe igalvanizing yombane.
Ixesha lokuposa: 20-04-23