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Umgomo wokukhiqiza we-hot-dip galvanized coating
I-Hot dip galvanizing iyinqubo ye-metallurgical chemical reaction. Ngokombono we-microscopic, inqubo ye-hot-dip galvanizing ibandakanya ukulingana okubili okuguquguqukayo: ukulingana okushisayo kanye nokulingana kokushintshisana kwe-zinc iron. Lapho izingxenye zensimbi zicwiliswa ku-zinc encibilikisiwe endaweni ecishe ibe ngu-450 ℃, izingxenye zensimbi ezisezingeni eliphansi zimunca ukushisa koketshezi lwezinki. Lapho izinga lokushisa lidlula ama-200 ℃, ukuxhumana phakathi kwe-zinc nensimbi kuya ngokuya kubonakale, futhi i-zinc ingena ongqimbeni olungaphezulu lwezingxenye zensimbi yensimbi.

Njengoba izinga lokushisa lensimbi lisondela kancane kancane izinga lokushisa le-zinc liquid, izingqimba ze-alloy ezinezilinganiso ezihlukene zensimbi ye-zinc kwakheka phezu kongqimba olungaphezulu lwensimbi, lwakha uhlaka olugqinsi lwe-zinc enamathela. Ngokuhamba kwesikhathi, izingqimba ze-alloy ezinhlobonhlobo zibonisa amazinga ahlukene okukhula. Ngokombono omkhulu, le nqubo engenhla ibonakala njengezingxenye zensimbi ezicwiliswa oketshezini lwe-zinc, okubangela ukubilisa kwendawo ewuketshezi ye-zinc. Njengoba i-zinc iron reaction reaction ilingana kancane kancane, i-zinc liquid surface kancane kancane iyancipha.
Lapho ucezu lwensimbi luphakanyiselwa ezingeni loketshezi lwe-zinc, futhi izinga lokushisa lensimbi lincipha kancane kancane libe ngaphansi kuka-200 ℃, ukusabela kwamakhemikhali ensimbi ye-zinc kuyama, bese kwakheka uthayela owuketshezi olushisayo, nokuqina okunqunyiwe.
Izidingo zokujiya zamasentimitha ashisayo ediphu
Izici eziyinhloko ezithinta ukushuba kwe-zinc enamathela zihlanganisa: ukwakheka kwensimbi ye-substrate, ukuhwaqeka kwendawo yensimbi, okuqukethwe nokusatshalaliswa kwezinto ezisebenzayo i-silicon ne-phosphorus ensimbi, ukucindezeleka kwangaphakathi kwensimbi, ubukhulu bejometri yezingxenye zensimbi, kanye nenqubo ye-hot-dip galvanizing.
Izindinganiso zamanje zamazwe ngamazwe kanye ne-Chinese hot-dip galvanizing zihlukaniswa ngezigaba ngokusekelwe kubukhulu bensimbi. Ugqinsi lomhlaba wonke nolwendawo lwe-zinc enamathela kufanele lufinyelele ugqinsi oluhambisanayo ukuze kunqunywe ukumelana nokugqwala kwe-zinc enamathela. Isikhathi esidingekayo ukuze kuzuzwe ukulingana okushisayo kanye nokulingana okuzinzile kokushintshaniswa kwensimbi ye-zinc siyahlukahluka ezingxenyeni zensimbi ezinobukhulu obuhlukahlukene, okuholela ekugqineni okuhlukahlukene okunamathelayo. Isilinganiso sokujiya esijwayelekile esisezingeni sisekelwe enanini lomkhiqizo wezimboni lesimiso sokushibilika se-hot-dip esishiwo ngenhla, futhi ukushuba kwendawo kuyinani lokuhlangenwe nakho elidingekayo ukuze kucatshangelwe ukusatshalaliswa okungalingani kogqinsi lwezinki kanye nezidingo zokumelana nokugqwala. .

Ngakho-ke, amazinga e-ISO, amazinga e-ASTM aseMelika, amazinga e-JIS yaseJapane, kanye namazinga aseShayina anezidingo ezihluke kancane zokuqina kwe-zinc, futhi umehluko awubalulekile.
Umthelela kanye nomthelela wokujiya kwe-hot-dip galvanized coating
Ugqinsi lwe-hot-dip galvanized coating lunquma ukumelana nokugqwala kwezingxenye ezipuletiwe. Ukuze uthole ingxoxo enemininingwane, sicela ubheke idatha efanele enikezwe i-American Hot Dip Galvanization Association kokunamathiselwe. Amakhasimende angaphinda akhethe ukujiya kwe-zinc enamathelayo ephakeme noma ephansi kunendinganiso.
Kunzima ukuthola i-coating eqinile ekukhiqizeni izimboni zamapuleti ensimbi amancane anesendlalelo esibushelelezi se-3mm noma ngaphansi. Ngaphezu kwalokho, ukuqina kwe-zinc enamathela okungalingani nobukhulu bensimbi bungathinta ukunamathela phakathi kwe-coating kanye ne-substrate, kanye nekhwalithi yokubukeka yokugqoka. Ukugqoka okuminyene ngokweqile kungabangela ukubukeka kwe-coating kube nzima, kujwayele ukuxebuka, futhi izingxenye ezicwecwe azikwazi ukumelana nokushayisana ngesikhathi sokuthutha nokufakwa.
Uma kunezinto eziningi ezisebenzayo ezifana ne-silicon ne-phosphorus ensimbi, kunzima kakhulu ukuthola ama-coatings amancane ekukhiqizeni kwezimboni. Lokhu kungenxa yokuthi okuqukethwe kwe-silicon ensimbi kuthinta imodi yokukhula yongqimba lwe-zinc iron alloy, okuzokwenza ukuthi ungqimba lwe-zeta lwe-zinc iron alloy lukhule ngokushesha futhi luqhube isigaba se-zeta sibheke phezu koqweqwe olungaphezulu lwe-coating, okuholela ekumangelekeni futhi. ungqimba olungaphezulu olufiphele lwe-coating, oludala ukunamathela okumpunga okumnyama nokunamathela okubi.
Ngakho-ke, njengoba kuxoxiwe ngenhla, kukhona ukungaqiniseki ekukhuleni kwezingubo ezifakwe emanzini ashisayo. Eqinisweni, kuvame ukuba nzima ukuthola uhla oluthile logqinsi lwe-coating ekukhiqizweni, njengoba kucaciswe emazingeni okufaka i-hot-dip galvanized.
Ubukhulu buyinani elibonakalayo elikhiqizwa ngemva kwenani elikhulu lokuhlolwa, kucatshangelwa izici ezihlukahlukene nezimfuneko, futhi kungokwesayensi futhi kunengqondo.