Inkqubo yokwenziwa kwe-hot-dip galvanized layer yinkqubo yokwenza i-alloy ye-iron-zinc phakathi kwe-iron substrate kunye ne-zinc ecocekileyo yangaphandle.I-iron-zinc alloy layer yenziwe phezu kwendawo yokusebenza ngexesha lokutshisa okutshisayo, ukwenzela ukuba isinyithi kunye ne-zinc ecocekileyo isondele kakhulu.Indibaniselwano elungileyo.Inkqubo yeekhoyili ezinkulu zeucingo lwezinkiingachazwa nje ngokuba: xa i-workpiece yentsimbi intywiliselwa kulwelo lwezinki olunyibilikisiweyo, isisombululo esiluqilima se-zinc kunye ne-α-iron (iziko lomzimba) lenziwa kuqala kujongano.Le yikristale eyenziwe ngokunyibilikisa iiathom ze-zinc kwisiseko sesinyithi kwisimo esiqinileyo.Iiathom ezimbini zesinyithi zixutywe, kwaye umtsalane phakathi kweeathom umncinci.
Ke ngoko, xa i-zinc ifikelela kwi-saturation kwisisombululo esiqinileyo, iiathomu ze-zinc kunye nentsimbi ziyasasazeka enye kwenye, kwaye iiathom ze-zinc ezisasazeke (okanye zingene ngaphakathi) kwi-matrix yentsimbi ifuduka kwileti ye-matrix, ngokuthe ngcembe yenze ialloy ngentsimbi, kwaye isasazeke kwi-Iron kulwelo lwezinki olutyhidiweyo lwenza ikhompawundi ye-intermetallic FeZn13 enezinki, izike emazantsi embiza eshushu yokuntywila, kwaye ibe yizinc slag.Xa i-workpiece isusiwe kwisisombululo se-zinc, i-zinc ecocekileyo yenziwa phezu komhlaba, eyi-crystal ene-hexagonal, kwaye umxholo wayo wentsimbi awukho ngaphezu kwe-0.003%.
I-Hot-dip galvanizing, ekwaziwa njenge-hot-dipukugalela, yindlela apho amacandelo ensimbi antywiliselwa kwi-zinc etyhidiweyo ukufumana i-coating yensimbi.Ngophuhliso olukhawulezayo lokuhanjiswa kwamandla ombane aphezulu, uthutho, kunye nonxibelelwano, iimfuno zokukhuselwa kwamalungu entsimbi ziya zinyuka nangaphezulu, kwaye imfuno ye-galvanizing yediphu eshushu iyanda.Ngokuqhelekileyo ubukhulu bomaleko owenziwe nge-electro-galvanized yi-5-15 μm, ngelixa ubukhulu bekhoyili enkulu yocingo olufakwe kwi-galvanized layer ingaphezulu kwe-35 μm, nokuba phezulu njenge-200 μm.I-Hot-dip galvanizing inokhuselo oluhle, i-coating exineneyo, kwaye akukho zibandakanya eziphilayo.
Njengoko sonke siyazi, indlela ye-zinc anti-atmospheric corrosion ibandakanya ukukhuselwa komatshini kunye nokukhuselwa kwe-electrochemical.Ngaphantsi kweemeko ze-corrosion ye-atmospheric, kukho i-ZnO, i-Zn (OH) i-2 kunye neefilimu ezisisiseko ze-zinc carbonate ezikhuselayo kumphezulu we-zinc layer, ezinciphisa ukubola kwe-zinc kwinqanaba elithile.Uluhlu lokuqala lwefilimu ekhuselayo (eyaziwa nangokuthi i-rust emhlophe) yonakaliswe, kwaye ifilimu entsha iya kwenziwa.
Xa i-zinc layer yonakaliswe kakhulu kwaye ibeka engozini i-iron substrate, i-zinc iya kukhusela i-electrochemically substrate, umgangatho osemgangathweni we-zinc ngu-0.76V, kunye ne-standard standard ye-iron -0.44V.Xa i-zinc kunye nentsimbi zenza ibhetri encinci, i-zinc iyachithwa njenge-anode, kunye nentsimbi Ekhuselwe njenge-cathode.Ngokucacileyo, i-hot-dip galvanizing ingcono kune-electro-galvanizing ekukwazini kwayo ukuxhathisa ukubola kwe-atmospheric yesiseko sesinyithi.
Ixesha lokuthumela: 14-06-23