Yintoni intsimbi egalelweyo? Ihlala ixesha elingakanani i-zinc coating?

Iinkqubo ezahlukeneyo zingasetyenziselwa ukugaya:

1. I-hot-dip galvanizing

2. Ukugaya nge-electro

3. Ukusasazeka kweZinc

4. Ukutshiza ngesinyithi

 

I-Hot-dip eqinisiweyo

Ngexesha lenkqubo yokugaya isinyithi, intsimbi ifakwa kwibhafu ye-zinc enyibilikisiweyo. I-hot-dip galvanizing (HDG) ibandakanya amanyathelo amathathu asisiseko: ukulungiswa komphezulu, ukugaya isinyithi, kunye nokuhlolwa.

Ukulungiswa komphezulu

Kwinkqubo yokulungisa umphezulu, intsimbi eyenziwe kwangaphambili ithunyelwa ukuze ifakelwe i-galvanizing kwaye idlula kumanqanaba amathathu okucoca: ukususa amafutha, ukuhlanjwa nge-asidi, kunye nokuguquguquka. Ngaphandle kwale nkqubo yokucoca, ukufaka i-galvanizing akunakuqhubeka kuba i-zinc ayizukusabela kwintsimbi engcolileyo.

Ukugaya nge-galvanizing

Emva kokuba ukulungiswa komphezulu kugqityiwe, intsimbi ifakwa kwi-98% ye-zinc enyibilikisiweyo kwi-830°F. I-engile apho intsimbi ifakwa khona embizeni kufuneka ivumele umoya ukuba uphume kwiimilo zetyhubhu okanye kwezinye iipokotho. Oku kukwavumela i-zinc ukuba idlule kwaye ingene emzimbeni wonke wentsimbi. Ngale ndlela, i-zinc idibana nentsimbi yonke. Intsimbi engaphakathi kwentsimbi iqala ukusabela kwi-zinc, yenze i-zinc-iron intermetallic coating. Kwicala langaphandle, kufakwa i-zinc coating ecocekileyo.

Uhlolo

Inyathelo lokugqibela kukuhlola uqweqwe. Uhlolo olubonakalayo lwenziwa ukujonga naziphi na iindawo ezingagqunywanga emzimbeni wentsimbi, njengoko uqweqwe aluyi kunamathela kwintsimbi engacocwanga. Igeyiji yobukhulu bemagnethi ingasetyenziselwa ukumisela uqweqwe loqweqwe.

 

2 Ukugaya nge-electro

Intsimbi efakwe i-electrogalvanized iveliswa ngenkqubo ye-electrochemical. Kule nkqubo, intsimbi intywiliselwa kwibhafu ye-zinc, kwaye umbane udlula kuyo. Le nkqubo ikwaziwa ngokuba yi-electroplating.

Ngaphambi kwenkqubo yokugaya i-electrogalvanizing, intsimbi kufuneka icocwe. 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 ekuboleni. Le electrolyte ibangela ukuba i-zinc ihlale kumphezulu wentsimbi njengengubo. Okukhona intsimbi ingena ixesha elide kwindawo yokuhlamba i-zinc, kokukhona ingubo iba nkulu.

Ukuphucula ukumelana nokugqwala, ezinye iingubo zokuguqula zisebenza kakhulu. Le nkqubo ivelisa umaleko owongezelelweyo we-zinc kunye ne-chromium hydroxides, nto leyo ebangela ukubonakala okuluhlaza okwesibhakabhaka kumphezulu wesinyithi.

 

3 Ukungena kweZinc

Ukugquma i-zinc kubandakanya ukwenza i-zinc coating phezu kwentsimbi okanye intsimbi ukuthintela ukugqwala kwesinyithi.

Kule nkqubo, intsimbi ifakwa kwisikhongozeli esinezinc, esivalwa size sifudunyezwe kubushushu obungaphantsi kweqondo lokunyibilika kwezinc. Isiphumo sale mpendulo kukwenziwa kwe-zinc-iron alloy, kunye nomaleko oqinileyo wangaphandle wezinc ecocekileyo enamathela kumphezulu wentsimbi kwaye inika ukumelana okukhulu nokugqwala. Olu gqubuthelo lukwanceda ukunamathela okungcono kwepeyinti kumphezulu.

Kwizinto ezincinci zesinyithi, i-zinc plating yeyona ndlela ifanelekileyo. Le nkqubo ifanelekile ngokukodwa kwiindawo zentsimbi ezimile ngendlela engaqhelekanga, njengoko umaleko ongaphandle unokulandela ngokulula ipateni yentsimbi esisiseko.

 

4 Ukutshiza ngesinyithi

Kwinkqubo yokutshiza isinyithi nge-zinc plating, amasuntswana e-zinc anyibilikisiweyo atshajwe ngombane okanye afakwe iatom ayatshizwa kumphezulu wentsimbi. Le nkqubo yenziwa kusetyenziswa i-spray gun ephathwayo okanye ilangatye elikhethekileyo.

Ngaphambi kokufaka i-zinc coating, zonke izinto ezingcolisayo, ezifana ne-overcoating engafunekiyo, ioyile, kunye ne-rust, kufuneka zisuswe. Emva kokuba inkqubo yokucoca igqityiwe, amasuntswana e-zinc anyibilikisiweyo afafazwa kumphezulu orhabaxa, apho aqina khona.

Le ndlela yokutshiza ngesinyithi yeyona ifanelekileyo ekuthinteleni ukuxobuka nokuqhekeka, kodwa ayilungele ukunika ukumelana nokugqwala okukhulu.

 

Ihlala ixesha elingakanani i-zinc coating?

Ngokuphathelele ukuqina, kudla ngokuxhomekeka kubukhulu bengubo ye-zinc, kunye nezinye izinto ezifana nohlobo lwendawo engqongileyo, uhlobo lwengubo ye-zinc esetyenzisiweyo, kunye nomgangatho wengubo yepeyinti okanye yokutshiza. Okukhona ingubo ye-zinc ityebile, kokukhona ixesha elide lokuphila.

Ukugalela nge-hot-dip vs. ukugalela nge-cold galvanizingIingubo ezigqunywe nge-hot-dip galvanized zihlala ixesha elide kuneengubo ezigqunywe nge-cold galvanized kuba zihlala zijiyile kwaye zomelele. I-hot-dip galvanizing ibandakanya ukuntywilisela isinyithi kwi-zinc enyibilikisiweyo, ngelixa kwindlela ye-cold galvanizing, umaleko omnye okanye emibini uyatshizwa okanye uqatywe.

Ngokuphathelele ukuqina, ii-hot-dip galvanized coatings zinokuhlala iminyaka engaphezu kwama-50 nokuba imeko yemozulu injani na. Ngokwahlukileyo koko, ii-coat-dip galvanized cold-dip cold coatings zihlala iinyanga ezimbalwa ukuya kwiminyaka embalwa, kuxhomekeke kubukhulu be-coatings.

Ukongeza, kwiindawo ezinobungozi kakhulu ezifana neendawo zoshishino, ubomi bezinto ezigqunywe zinc bunokuncipha. Ke ngoko, ukukhetha izinto ezigqunywe zinc ezisemgangathweni ophezulu nokuzigcina ixesha elide kubalulekile ekukhuseleni kakhulu ekungcoleni, ekugugeni nasekugruleni.