Raws li lub ntsiab lus ntawm European standard EN {{{0}}}, zinc-aluminium-magnesium txheej yog ternary alloy txheej uas nws lub ntsiab yog zinc, thiab cov ntsiab lus ntawm txhuas thiab magnesium yog nyob nruab nrab ntawm 1.5 thiab 8% (ntawm uas cov ntsiab lus magnesium tsis tsawg dua 0.2%).
Piv nrog cov txheej txheem ib txwm muaj xws li kub-dip galvanizing,galvanized aluminium, thiab zinc-hlau alloys, zinc-aluminium-magnesium coatings muaj zoo corrosion kuj.
Qhov zoo ntawm zinc, aluminium thiab magnesium cov khoom
1.Super corrosion-resistant
Al, Mg, Si thiab lwm yam alloying ntsiab yog ntxiv rau zinc-aluminium-magnesium steel phaj txheej, uas zoo heev txhim kho corrosion inhibition nyhuv ntawm txheej. Piv nrog rau cov khoom siv galvanized zoo tib yam, txheej txheej muaj qhov adhesion tsawg dua tab sis tuaj yeem ua tau zoo dua corrosion kuj. Nws yog kub-dip 10 mus rau 20 npaug ntawm galvanized steel phaj.
2. Kev kho tus kheej
Kev kho tus kheej ntawm kev ua tiav ntawm cov khoom siv zinc, aluminium thiab magnesium txhais tau hais tias nyob rau hauv qhov chaw ntub dej ntawm qhov chaw phais, cov khoom siv txheej nyob ze ntawm qhov incisions yaj mus rau hauv cov yeeb yaj kiab dej txuas rau saum npoo ntawm cov hlau raug thiab tsis tu ncua migrates thiab dissipates mus rau qhov raug incisions, tsim ib tug sib tov ntawm zinc hydroxide, ib tug tuab tiv thaiv zaj duab xis (dawb xeb) muaj li ntawm alkaline zinc chloride thiab magnesium hydroxide maj mam npog cov raug txiav hlau, cais cov sab nraud corrosive nruab nrab ntawm cov raug hlau matrix, yog li tiv thaiv ntxiv. corrosion ntawm qhov raug txiav. Tag nrho cov txheej txheem yuav siv sij hawm ntev.
3. Lub neej ntev
Cov ntsiab lus tseem ceeb ntawm zinc, txhuas thiab magnesium yog qhov sib ntxiv ntawm Mg-Al-Zn, uas muaj zog thiab txhim khu kev qha tiv thaiv cov tshuaj chlorine ( noj ntsev / hws stains / hiav txwv nto / hmo ntuj cua / av txheej) thiab alkali corrosion kuj, uas tuaj yeem xyuas kom meej tias nws yuav tsis tshwm sim rau 20-30 xyoo. liab xeb.
Qhov no yog cov khoom siv txheej txheej nrog kev ua haujlwm zoo heev. Nws tuaj yeem ua tau 10-20 lub sij hawm muaj zog dua zinc plating ntawm tib tus nqi txheej. Nws muaj kev tiv thaiv zoo heev rau kev txiav tawm thiab muaj kev ua haujlwm vuam zoo.
Lub luag haujlwm ntawm Mg thiab Al hauv zinc, txhuas thiab magnesium
▶ Mg thiab Al nyob rau hauv zinc-aluminium-magnesium txheej tuaj yeem ruaj khov zinc carbonate thiab tiv thaiv kev tsim ntawm ZnO xoob. Nws yuav txhawb txoj kev loj hlob ntawm oxide corrosion khoom mus rau qhov ntom ntom, solubility tsawg, thiab tsis zoo conductivity.
▶ Thaum cov ntsiab lus yog siab, ntom qe precolate khoom nrog zoo adhesion thiab cov khoom lag luam qis yog tsim tawm.
▶ Lub polarization tsis kam ntawm Zn-Al-Mg alloy txheej yog kwv yees li ob zaug ntawm cov zinc txheej ntshiab, uas yog ib qho ntawm cov laj thawj vim li cas qhov corrosion kuj ntawm Zn-Al-Mg alloy txheej yog siab dua li cov zinc ntshiab.
