Yintoni intsimbi ekhandisiweyo ? Ingaba i-zinc ihlala ixesha elingakanani?

Iinkqubo ezahlukeneyo zingasetyenziselwa ukwenza igalvanizing:

1. I-Hot-dip galvanizing

2. Electro galvanizing

3. Ukusasazwa kweZinc

4. Ukutshiza ngesinyithi

 

I-Hot-dip yenziwe ngegalvanized

Ngethuba lenkqubo ye-galvanizing, intsimbi ifakwe kwi-bath zinc etyhidiweyo. I-Hot-dip galvanizing (HDG) ibandakanya amanyathelo amathathu asisiseko: ukulungiswa komphezulu, ukugalela, kunye nokuhlola.

Ukulungiswa komphezulu

Kwinkqubo yokulungiselela umphezulu, intsimbi esele yenziwe ngaphambili ithunyelwa kwi-galvanizing kwaye ithatha izigaba ezintathu zokucoca: ukuhlanjululwa, ukuhlamba i-asidi, kunye ne-fluxing. Ngaphandle kwale nkqubo yokucoca, i-galvanizing ayikwazi ukuqhubeka kuba i-zinc ayiyi kusabela ngentsimbi engcolileyo.

Ukugalela

Emva kokuba ukulungiswa komphezulu kugqityiwe, intsimbi intywiliselwa kwi-98% ye-zinc etyhidiweyo kwi-830 ° F. I-angle apho intsimbi intywiliselwa embizeni kufuneka ivumele umoya ukuba uphume kwiimilo ze-tubular okanye ezinye iipokotho. Oku kwakhona kuvumela i-zinc ukuba ihambe kwaye ingene kuwo wonke umzimba wentsimbi. Ngale ndlela, i-zinc idibana nayo yonke intsimbi. Intsimbi ngaphakathi kwentsimbi iqala ukusabela nge-zinc, yenza i-zinc-iron intermetallic coating. Kwicala langaphandle, i-zinc coating ecocekileyo ifakwe.

Ukuhlolwa

Inyathelo lokugqibela kukuhlola ukutyabeka. Ukuhlolwa okubonakalayo kuqhutyelwa ukujonga nayiphi na indawo engabonakaliyo kumzimba wensimbi, njengoko isambatho asiyi kubambelela kwintsimbi engcolileyo. Igeyiji yobukhulu bemagnethi isenokusetyenziswa ukumisela ukutyeba kokugquma.

 

2 Electro gavanizing

Intsimbi ye-Electrogalvanized iveliswa ngenkqubo ye-electrochemical. Kule nkqubo, intsimbi ifakwe kwi-bath ye-zinc, kwaye umbane wombane udlula kuyo. Le nkqubo ikwabizwa ngokuba yi-electroplating.

Ngaphambi kwenkqubo ye-electrogalvanizing, intsimbi kufuneka ihlambuluke. Apha, i-zinc isebenza njenge-anode yokukhusela intsimbi. Kwi-electrolysis, i-zinc sulfate okanye i-zinc cyanide isetyenziswa njenge-electrolyte, ngelixa i-cathode ikhusela intsimbi ekungcoleni. Le electrolyte ibangela ukuba i-zinc ihlale kwindawo yentsimbi njengengubo. Ixesha elide isinyithi sintywiliselwa kwi-bath ye-zinc, i-coating iyancipha ngakumbi.

Ukomeleza ukuxhathisa umhlwa, uguqulo oluthile lusebenza kakhulu. Le nkqubo ivelisa umaleko owongezelelweyo we-zinc kunye ne-chromium hydroxides, okukhokelela kwimbonakalo eluhlaza okwesibhakabhaka phezu kwesinyithi.

 

3 Ukungena kweZinc

I-zinc plating ibandakanya ukwenza i-zinc coating phezu kwentsimbi okanye intsimbi ukuthintela ukubola kwesinyithi.

Kule nkqubo, intsimbi ifakwe kwisitya kunye ne-zinc, emva koko ivalwe kwaye ishushu kwiqondo lokushisa elingaphantsi kwendawo yokunyibilika kwe-zinc. Isiphumo sale mpendulo kukubunjwa kwe-alloy ye-zinc-iron, kunye nomgangatho ongaphandle oqinileyo we-zinc ecocekileyo enamathela kumphezulu wensimbi kunye nokubonelela ngokuxhathisa okukhulu kwe-corrosion. Olu tyaba lukwaququzelela ukunamathela kwepeyinti engcono kumphezulu.

Kwizinto ezincinci zetsimbi, i-zinc plating yeyona ndlela ifanelekileyo. Le nkqubo ifaneleke ngokukhethekileyo kumacandelo ensimbi akhiwe ngokungaqhelekanga, njengoko umaleko wangaphandle unokulandela ngokulula umzekelo wesiseko sentsimbi.

 

4 Ukutshiza ngesinyithi

Kwi-metal yokutshiza inkqubo ye-zinc plating, i-electric charge okanye i-atomized zinc particles ezityhidiweyo zifafazwe phezu kwentsimbi. Le nkqubo iqhutyelwa ngokusebenzisa umpu wokutshiza ophethwe ngesandla okanye ilangatye elikhethekileyo.

Ngaphambi kokufaka i-zinc coating, zonke izinto ezingcolileyo, ezifana neengubo zomphezulu ezingafunekiyo, ioli kunye nomhlwa, kufuneka zisuswe. Emva kokuba inkqubo yokucoca igqityiwe, i-atomized zinc particles ezityhidiweyo zifafazwe kwindawo enqabileyo, apho ziqina khona.

Le ndlela yokutshiza isinyithi yeyona ndlela ifanelekileyo yokuthintela ukuhluma kunye nokugqabhuka, kodwa ayifanelekanga ukubonelela ukuxhathisa okubonakalayo kwe-corrosion.

 

Ingaba i-zinc ityabeka ixesha elingakanani?

Ngokuphathelele ukuqina, ngokuqhelekileyo kuxhomekeke kubukhulu be-zinc coating, kunye nezinye izinto ezifana nohlobo lokusingqongileyo, uhlobo lwe-zinc esetyenzisiweyo, kunye nomgangatho wepeyinti okanye ukutshiza. Ukuqina kwe-zinc coating, ixesha elide lokuphila.

I-Hot-dip galvanizing vs. i-galvanizing ebandayoIingubo zokwaleka ezenziwe ngentsimbi eshushu zihlala ixesha elide kunezo ezibandayo ngenxa yokuba zijiyile kwaye zomelele ngakumbi. I-Hot-dip galvanizing ibandakanya ukuntywiliselwa kwesinyithi kwi-zinc etyhidiweyo, ngelixa kwindlela ebandayo yokufaka igalvanizing, umaleko omnye okanye emibini iyatshizwa okanye ibrashwe.

Ngokumalunga nokuqina, i-hot-dip galvanized coatings ingahlala ngaphezu kweminyaka engama-50 ngaphandle kweemeko zokusingqongileyo. Ngokwahlukileyo koko, i-cold-dip galvanized coatings ihlala kuphela kwiinyanga ezimbalwa ukuya kwiminyaka embalwa, kuxhomekeke kubukhulu bokugquma.

Ukongezelela, kwiindawo ezinobungozi kakhulu ezifana nezicwangciso zemizi-mveliso, ixesha lokuphila kweengubo ze-zinc linokulinganiselwa. Ke ngoko, ukukhetha iingubo ezikumgangatho ophezulu we-zinc kunye nokuzigcina ixesha elide kubalulekile ekwandiseni ukhuseleko ngokuchasene nomhlwa, ukuguga kunye nomhlwa.