1.Puas txias txias-kho cov pa roj carbon steel muaj cov hlau hnyav?
Lub substrate nws tus kheej tsis txhob txwm ntxiv, tab sis tej zaum yuav muaj cov kab mob hnyav hlau impurities.
Cov ntsiab lus tseem ceeb: Hlau (Fe), Carbon (C), Silicon (Si), Manganese (Mn)
Cov kab mob tsis huv: Tej zaum yuav muaj cov kab mob tooj liab (Cu), arsenic (As), lead (Pb), tin (Sn), antimony (Sb), thiab lwm yam.
2.Do txias- dov stainless hlau coils muaj cov hlau hnyav?
muaj.
Yuav tsum tau ntxiv: Chromium (Cr), Nickel (Ni), thiab lwm yam. Tej zaum yuav ntxiv: Molybdenum (Mo), Titanium (Ti), thiab lwm yam.
3.Puas coated txias-rolled steel muaj cov hlau hnyav?
Nto txheej muaj
Galvanized ntawv: Muaj zinc (Zn)
Tin-Plated Sheet (tinplate): Muaj tin (Sn)
4.Lub ntsiab lus dab tsi txog "hnyav hlau" xav tau kev qhia meej?
Kev mob siab ntxiv cov ntsiab lus alloying, xws li chromium thiab npib tsib xee hauv stainless hlau, yog cov khoom tseem ceeb uas muab cov khoom tshwj xeeb rau cov khoom. Lawv raug cais raws li "engineering hnyav hlau" thiab muaj kev nyab xeeb thiab ruaj khov raws li kev siv ib txwm siv.
Ua phem rau cov hlau tsis huv, xws li txhuas, mercury, cadmium, thiab hexavalent chromium, yog cov khoom siv nruj me ntsis los ntawm kev tswj hwm ib puag ncig hauv ntau lub tebchaws (xws li EU RoHS Cov Lus Qhia). Cov ntsiab lus ntawm cov khoom tsis zoo no yuav tsum tau sim thiab tswj xyuas thaum tsim cov ntawv txias -rolled steel.
5.Dab tsi yog qhov yuav tsum tau ua ntawm ib puag ncig thiab kev nyab xeeb?
Txias-rolled strip steel nroj tsuag muaj kev cai nruj rau kev ntxuav thiab kho cov pa khib nyiab uas muaj cov hlau hnyav xws li zinc thiab chromium thaum lub sijhawm tsim khoom. Cov txheej txheem pickling kuj tsim cov pa khib nyiab uas muaj chromic acid pos huab, uas yuav tsum tau tswj emission.
Rau cov khoom uas muaj kev tiv thaiv ib puag ncig (xws li cov khoom siv hluav taws xob thiab hluav taws xob xa tawm mus rau EU), cov ntawv txias -khoov hlau yuav tsum tau kuaj xyuas kom muaj ntau yam teeb meem xws li txhuas, mercury, thiab hexavalent chromium.