Galvalume steel kauj yog ib hom ntawv hlau siv dav hauv kev tsim kho, khoom siv hauv tsev, tsheb, thiab kev siv tiv thaiv kev lag luam. Nws qhov kev ua tau zoo tseem ceeb nyob hauv nws cov khoom siv txheej txheej tshwj xeeb thiab cov qauv substrate. Cov khoom siv no, tsim los ntawm txheej txheej aluminium-zinc alloy txheej ntawm qis- carbon steel substrate, sib txuas ua ke zoo heev corrosion kuj, siab -kub tsis kam, thiab txhua yam muaj zog, ua rau nws yog ib qho tseem ceeb ntawm cov khoom siv hauv kev lag luam niaj hnub no.
Substrate: Tsawg-Carbon Steel Substrate
Lub substrate rau galvalume steel kauj yog feem ntau qis - carbon steel (xws li tus qauv txias- dov steel strip zoo li SPCC thiab DC01). Nws cov ntsiab lus carbon tsawg dua 0.12%, thiab nws muaj cov khoom tsim nyog xws li manganese thiab silicon kom sib npaug zog thiab ua haujlwm tau zoo. Tsawg- carbon steel muaj qhov zoo tshaj plaws ductility thiab formability, ua rau nws yuav tsum tau dov mus rau hauv nyias, zoo li coils, muab lub hauv paus ruaj khov rau cov txheej txheem tom ntej kom ua raws. Tsis tas li ntawd, lub purity ntawm lub substrate ncaj qha cuam tshuam lub adhesion ntawm txheej, yog li impurities xws li sulfur thiab phosphorus yuav tsum tau nruj me ntsis tswj thaum lub sij hawm ntau lawm txheej txheem.
Txheej: Aluminium-Zinc Alloy's Synergistic Protection Mechanism
Tus nqi tseem ceeb ntawm galvanized steel kauj yog nyob rau hauv nws txheej txheej -feem ntau yog ternary alloy ntawm 55% aluminium, 43.4% zinc, thiab 1.6% silicon (Galvalume® alloy). Cov txheej txheem no ua tiav kev ua haujlwm siab los ntawm cov txheej txheem hauv qab no:
1. Aluminum's Barrier Effect: Aluminum forms a dense aluminum oxide (Al₂O₃) film on the coating surface, isolating it from oxygen and moisture, providing long-term weathering resistance, particularly in high-temperature environments (such as roofing applications).
2. Zinc's Sacrificial Anodic Protection: Raws li cov hlau siv hluav taws xob ntau dua, zinc corrodes nyiam dua thaum txheej txheej puas lawm, yog li tiv thaiv cov hlau hauv qab. Cov cuab yeej no tseem ceeb tshwj xeeb ntawm kev txiav cov npoo los yog khawb.
3. Silicon Enhances Stability: Qhov sib ntxiv ntawm ib qho me me ntawm silicon inhibits oxidation ntau dhau ntawm cov txheej thaum lub sij hawm siab - kub annealing thiab txhim kho cov alloy qhov adhesion rau steel substrate.
Cov ntsiab lus pab txhawb thiab txheej txheej optimization
Qee qhov siab -kawg galvanized steel coils yog ntxiv coated nrog cov organic resins (xws li polyester lossis silicone- hloov polyester) rau saum npoo ntawm txheej, tsim "galvanized xim-coated steel sheets" los txhim kho khawb tsis kam, xim durability, thiab UV tsis kam. Tsis tas li ntawd, cov txheej txheej tuab (feem ntau 50-180 g / m²) thiab kev sib txig sib luag tau raug kho kom raug siv cov cuab yeej siv riam phom cua kom tau raws li qhov xav tau ntawm cov ntawv thov sib txawv.
Cov ntsiab lus
Kev ua tau zoo ntawm galvanized steel coils yog txiav txim siab los ntawm kev sib piv ntawm nws cov hlau me me substrate thiab aluminium-zinc alloy txheej. Cov khoom no, los ntawm nws cov intermetallic synergy, ua tiav qhov sib npaug ntawm kev tiv thaiv corrosion (kwv yees li 2-} 6 npaug ntawm cov hlau galvanized zoo tib yam), cov cua kub tsis kam (stainable kuj mus rau qhov kub siab tshaj 300 degree), thiab kev ua tau zoo ntawm tus nqi tswj tau, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev tsim khoom niaj hnub uas sib npaug ntawm kev ua haujlwm thiab tus nqi zoo. Nyob rau hauv lub neej yav tom ntej, nrog rau kev nce qib hauv cov txheej txheem alloy thiab txheej txheej txheej txheem, daim ntawv thov ntawm galvanized steel coils yuav txuas ntxiv mus rau qhov xav tau kev siv xws li lub zog tshiab thiab marine engineering.
