Iindaba

I-Hot dip galvanizing, ekwabizwa ngokuba yi-hot dip galvanizing kunye ne-hot dip galvanizing, yindlela esebenzayo yokuthintela ukuhlwa kwesinyithi, esetyenziswa ikakhulu kwizakhiwo zentsimbi kunye nezibonelelo kumashishini ahlukeneyo.Kukuntywilisela iinxalenye zentsimbi echithiweyo kwi-zinc etyhidiweyo malunga ne-500 ℃ ukubambelela umaleko we-zinc kumphezulu wamacandelo ensimbi, ngaloo ndlela ufezekise injongo yokuthintela ukubola.Ukuqukuqela kwenkqubo yediphu eshushu yokugalela: ukucholwa kwemveliso egqityiweyo - ukuhlamba amanzi - ukongeza isisombululo esincedisayo sokutya - ukomisa - ukuxhoma iplating - ukupholisa - ukunyanga - ukucoca - ukugulisa - ukugqitywa kwediphu eshushu yokufaka igalvanizing , kwaye inembali engaphezulu kweminyaka eyi-170 ukusukela oko iFransi yafaka idiphu eshushu kwishishini ngo-1836. Kwiminyaka engamashumi amathathu edlulileyo, kunye nophuhliso olukhawulezayo lwentsimbi eqengqelekayo eqengqelekayo, ishishini lokugalela idiphu elishushu liye laphuhla ngomlinganiselo omkhulu.
I-Hot dip galvanizing, ekwabizwa ngokuba yi-hot dip galvanizing, yindlela yokufumana intsimbi yokugquma kumalungu entsimbi ngokuntywiliselwa kwi-zinc etyhidiweyo.Ngophuhliso olukhawulezayo lokuhanjiswa kwamandla ombane aphezulu, uthutho, kunye nonxibelelwano, iimfuno zokukhuselwa kwamalungu entsimbi ziya zisanda, kwaye imfuno ye-galvanizing yediphu eshushu iyanda.

Ukusebenza okukhuselekileyo
Ngokuqhelekileyo, ubukhulu bomgca we-galvanized yi-5 ~ 15 μ m.Umaleko oshushu-diphu owenziwe ngamazingile uqhele ukuba yi-35 μ Ngaphezulu kwe-m, nokuya kuthi ga kwi-200 μ m. Idiphu eshushu yokufaka igalvanizing inamandla okugquma, ukugquma okuxineneyo, kwaye akukho ziqukethwe eziphilayo.Kuyaziwa ukuba iindlela zokumelana ne-zinc kwi-corrosion ye-atmospheric ziquka ukukhuselwa komatshini kunye nokukhuselwa kwe-electrochemical.Ngaphantsi kweemeko ze-atmospheric corrosion, umphezulu we-zinc layer ine-ZnO, i-Zn (OH) 2, kunye ne-basic zinc carbonate films protective films, ethi kwinqanaba elithile licothise ukubola kwe-zinc.Ukuba le filimu yokukhusela (eyaziwa ngokuba yi-white rust) yonakele, iya kwenza ifilimu entsha.Xa i-zinc layer yonakaliswe kakhulu kwaye ibeka engozini i-iron substrate, i-zinc inika ukhuseleko lwe-electrochemical kwi-substrate.Umgangatho osemgangathweni we-zinc ngu-0.76V, kwaye umgangatho osemgangathweni wentsimbi ngu-0.44V.Xa i-zinc kunye nentsimbi zenza ibhetri encinci, i-zinc iyachithwa njenge-anode, kwaye intsimbi ikhuselwe njenge-cathode.Ngokucacileyo, ukuxhathisa kwe-atmospheric corrosion of hot dip galvanizing kwisiseko sentsimbi yentsimbi ingcono kunoko kusenziwa nge-electrogalvanizing.
Inkqubo yokuqulunqa i-Zinc coating
Inkqubo yokwakhiwa kwediphu eshushu yomaleko yinkqubo yokwenza ingxubevange yentsimbi ye-zinc phakathi kwe-iron substrate kunye ne-zinc ecocekileyo yomaleko ngaphandle kwe-Z. I-iron zinc alloy layer yenziwa kumphezulu we-workpiece ngexesha lokufakwa kwediphu eshushu. ivumela ukudibanisa okulungileyo phakathi kwentsimbi kunye ne-zinc layer ecocekileyo.Inkqubo inokuchazwa ngokulula ngolu hlobo lulandelayo: Xa i-workpiece yentsimbi intywiliselwa kulwelo lwezinki olunyibilikisiweyo, i-zinc kunye nezinc zenziwa kuqala kujongano α Iron (undoqo womzimba) unyibilike oqinileyo.Le yikristale eyenziwe ngokunyibilikisa iiathom ze-zinc kwindawo eqinileyo yesiseko sesinyithi.Iiathom ezimbini zesinyithi zixutywe, kwaye umtsalane phakathi kweeathom umncinci.Ke ngoko, xa i-zinc ifikelela ekuzalisekeni kwinyibilika eqinileyo, iiathom ezimbini ze-zinc kunye nentsimbi ziyasasazeka enye kwenye, kwaye iiathom ze-zinc zisasazeke phakathi (okanye zingene ngaphakathi) kwimatrix yentsimbi ifuduka kwileti ye-matrix, ngokuthe ngcembe yenze ialloyi ngentsimbi. , ngelixa i-iron kunye ne-zinc isasazeke kwi-zinc etyhidiweyo ye-zinc liquid by high-high-high-forty form i-intermetallic compound FeZn13, etshona phantsi kwebhodwe elitshisayo elitshisayo, lenze i-zinc slag.Xa i-workpiece isusiwe kwisisombululo se-zinc, i-zinc ecocekileyo yenziwa phezu komhlaba, eyi-crystal ene-hexagonal.Umxholo wayo wentsimbi awukho ngaphezu kwe-0.003%.
Ukwahluka kobugcisa
Ukunganyangeki komhlwa kokugalela okushushu kuphezulu kakhulu kunoko kubanda kwegalvanizing (ekwaziwa ngokuba yigalvanization).I-galvanizing eshushu ayiyi kuhlwa kwiminyaka embalwa, ngelixa i-galvanizing ebandayo iya kuhlwa kwiinyanga ezintathu.
Inkqubo ye-electrogalvanizing isetyenziselwa ukukhusela isinyithi kwi-corrosion."Kuya kubakho umaleko okhuselayo wentsimbi emaphethelweni kunye nomphezulu wemveliso, owongeza indawo entle ekusebenzeni.Kule mihla, amashishini amakhulu aneemfuno eziphakamileyo zecandelo lemveliso kunye netekhnoloji, ngoko ke kuyimfuneko ukuguqula itekhnoloji okwangoku. ”