Iindaba

Umgaqo-siseko wesizukulwana sokwaleka okushushu kwediphu
Idiphu eshushu yinkqubo ye-metallurgical chemical reaction. Ukusuka kumbono we-microscopic, inkqubo ye-hot-dip galvanizing ibandakanya ukulingana okubili okuguquguqukayo: ukulingana kwe-thermal kunye ne-zinc iron exchange equilibrium. Xa iindawo zentsimbi zintywiliselwa kwi-zinc etyhidiweyo malunga ne-450 ℃, iindawo zentsimbi kwiqondo lobushushu begumbi zifunxa ubushushu bolwelo lwezinki. Xa ubushushu bungaphezu kwama-200 ℃, intsebenziswano phakathi kwe-zinc kunye ne-iron ibonakala ngokuthe ngcembe, kwaye i-zinc ingena kumphezulu weendawo zentsimbi.

Njengoko ubushushu bentsimbi busondela ngokuthe ngcembe kwiqondo lobushushu le-zinc, i-alloy layers kunye ne-zinc iron ratios ezahlukeneyo zenziwa kumphezulu wentsimbi, zenza i-layer ye-coating ye-zinc. Njengoko ixesha lihamba, i-alloy layers kwi-coating ibonisa amazinga ahlukeneyo okukhula. Ngokwembono enkulu, le nkqubo ingasentla ibonakala njengentsimbi entywiliselwa kulwelo lwezinki, ebangela ukubila komphezulu wolwelo lwezinki. Njengoko i-zinc iron reaction ikhula ngokuthe ngcembe, umphezulu we-zinc liquid uyathomalalisa.
Xa intsimbi yentsimbi iphakanyiselwe kwinqanaba lolwelo lwe-zinc, kwaye ubushushu bentsimbi yentsimbi buyancipha ngokuthe ngcembe ukuya ngaphantsi kwe-200 ℃, i-zinc iron reaction reaction iyayeka, kwaye i-hot-dip galvanized coating yenziwe, kunye nobukhulu bunqunywe.
Iimfuno zokutyeba kwiingubo ezishushu zediphu
Izinto eziphambili ezichaphazela ubukhulu be-zinc coating zibandakanya: i-substrate metal composition, i-rough surface yentsimbi, umxholo kunye nokusabalalisa izinto ezisebenzayo i-silicon kunye ne-phosphorus kwintsimbi, uxinzelelo lwangaphakathi lwentsimbi, imilinganiselo yejometri yeengxenye zetsimbi, kunye nenkqubo ye-galvanizing eshushu-dip.
Imigangatho yangoku yamazwe ngamazwe kunye ne-Chinese hot-dip galvanizing ihlukaniswe ngamacandelo asekelwe kubunzima bentsimbi. Ubunzima behlabathi kunye nommandla we-coating ye-zinc kufuneka bufikelele kwi-thickness ehambelanayo ukumisela ukuxhathisa kwe-corrosion ye-coating ye-zinc. Ixesha elifunekayo ukufezekisa ukulingana kwe-thermal kunye ne-zinc ezinzileyo yotshintshiselwano lwe-iron equilibrium iyahluka kwiingxenye zetsimbi ezinobunzima obuhlukeneyo, okubangelwa ubuninzi beengubo ezahlukeneyo. Umyinge wokwaleka ubukhulu bomgangatho usekelwe kumava emveliso yemveliso yexabiso lomgaqo-siseko oshushu-diphu wokugalela okhankanywe ngasentla, kunye nobukhulu bendawo lixabiso lamava elifunekayo ukuqwalasela ulwabiwo olungalinganiyo lobungqingqwa be-zinc kunye neemfuno zokuxhathisa umhlwa. .

Ke ngoko, imigangatho ye-ISO, imigangatho ye-ASTM yaseMelika, imigangatho ye-JIS yaseJapan, kunye nemigangatho yaseTshayina ineemfuno ezahlukeneyo zobunzima be-zinc, kwaye umahluko awubalulekanga.
Isiphumo kunye nefuthe lobushushu-diphu yokwambathisa yagalvanized ubukhulu
Ubunzima be-at-dip galvanized coating bumisela ukuxhathisa kwe-corrosion of the plated parts. Ngengxoxo eneenkcukacha, nceda ubhekiselele kwidatha efanelekileyo enikezelwe yi-American Hot Dip Galvanization Association kwisinamathiselo. Abathengi banokukhetha kwakhona ubukhulu be-zinc yokwambathisa obuphezulu okanye obuphantsi kunomgangatho.
Kunzima ukufumana isigqubuthelo esityebileyo kwimveliso yemveliso yeepleyiti zentsimbi ezibhityileyo ezinomgangatho ogudileyo we-3mm okanye ngaphantsi. Ukongeza, ubukhulu be-zinc obungalinganiyo nobukhulu bentsimbi bunokuchaphazela ukunamathela phakathi kwengubo kunye ne-substrate, kunye nomgangatho wokubonakala kwengubo. Ukutya okugqithisiweyo okugqithisileyo kunokubangela ukuba ukubonakala kwengubo ibe rhabaxa, ithande ukuhlanjululwa, kwaye iindawo ezicwengiweyo azikwazi ukumelana nokungqubana ngexesha lokuthutha kunye nokufakwa.
Ukuba kukho izinto ezininzi ezisebenzayo ezifana ne-silicon kunye ne-phosphorus kwintsimbi, kunzima kakhulu ukufumana iingubo ezincinci kwimveliso yoshishino. Oku kungenxa yokuba umxholo we-silicon kwintsimbi uchaphazela indlela yokukhula ye-zinc iron alloy layer, eya kubangela ukuba i-zeta yesigaba se-zinc iron alloy layer ikhule ngokukhawuleza kwaye ityhale isigaba se-zeta ukuya kumaleko omgangatho we-coating, okukhokelela kumqolo orhabaxa kunye. umaleko omdaka womphezulu wokwaleka, uvelisa idyasi elingwevu elimnyama ngokuncamathela kakubi.
Ngoko ke, njengoko kuxoxwe ngasentla, kukho ukungaqiniseki ekukhuleni kweengubo ezishushu zediphu. Enyanisweni, kudla ngokuba nzima ukufumana uluhlu oluthile lokutyabeka kwimveliso, njengoko kuchaziwe kwimigangatho eshushu yediphu.
Ukutyeba lixabiso elibonakalayo eliveliswe emva kwenani elikhulu lemifuniselo, kuthathelwa ingqalelo imiba eyahlukeneyo kunye neemfuno, kwaye ngokwentelekiso yenzululwazi kwaye isengqiqweni.