Kev sib piv ntawm 304L thiab 316L txhuam stainless hlau phaj

304 thiab 316 yog ob qho tib si cov lej ntawm stainless hlau.Hauv essence, lawv tsis txawv.Lawv yog ob qho tib si stainless hlau, tab sis lawv nyob rau ntau hom thaum sib faib.Qhov zoo ntawm 316 stainless hlau yog siab dua li ntawm 304 stainless hlau.Raws li 304,316 stainless hlausuav nrog hlau molybdenum, uas tuaj yeem txuas ntxiv cov qauv molecular ntawm stainless hlau.Ua kom nws hnav-tiv taus ntau dua thiab tiv thaiv oxidation, thiab tib lub sijhawm, kev tiv thaiv corrosion kuj tseem nce ntxiv
Kev sib piv ntawm 304L thiab316L txhuam stainless hlau phaj
Kev tiv thaiv corrosion ntawm stainless hlau yog qhov tseem ceeb tshaj li nws tus kheej stain kuj.Raws li cov hlau alloy, thawj qhov sib xyaw ntawm cov hlau tsis muaj hlau yog hlau, tab sis vim yog qhov sib ntxiv ntawm lwm cov ntsiab lus, nws tuaj yeem ua tiav ntau yam khoom siv uas xav tau.Chromium yog qhov txiav txim siab hauv cov hlau tsis muaj steel, tsawg kawg yog 10.5% ntawm cov muaj pes tsawg leeg.Lwm yam alloying ntsiab muaj xws li npib tsib xee, titanium, tooj liab, nitrogen thiab selenium.
Qhov txawv ntawm 304L thiab 316L brushed Stainless hlau phaj yog muaj chromium, 316L txhuam stainless hlau muaj corrosion kuj zoo dua, tshwj xeeb tshaj yog nyob rau hauv nruab nrab ib puag ncig nrog salinity siab.Rau kev siv nrog cov khoom siv sab nraum zoov stainless hlau, stainless hlau yog cov khoom siv zoo tshaj plaws corrosion-resistant rau lub sij hawm ntev sab nraum zoov.
natural corrosion kuj
Cov ntsiab lus sib txawv ntawm chromium thiab lwm cov ntsiab lus tuaj yeem qhia cov qib sib txawv ntawm kev tiv thaiv corrosion.Ob qib stainless hlau feem ntau yog 304 thiab 316. Corrosion yog ib yam tshwm sim, ib yam li hlau reacts ib puag ncig nws.Qhov tseeb, cov ntsiab lus tsawg heev tuaj yeem tshwm sim hauv daim ntawv ntshiab - kub, nyiaj, tooj liab, thiab platinum yog cov piv txwv tsawg heev.
Chromium oxide tsim ib qho kev tiv thaiv zaj duab xis intrinsically
Rusting yog txheej txheem los ntawm cov hlau molecules ua ke nrog cov pa oxygen hauv cov dej molecules, thiab qhov tshwm sim yog cov xim liab uas ua rau mob zuj zus ntxiv-corroding ntau ntawm cov khoom.Ntawm cov no, hlau thiab carbon hlau yog ntau dua rau qhov corrosion.
Stainless hlau muaj lub peev xwm los corrode saum npoo, qhov no tuaj txog li cas?Chromium nyob rau hauv tag nrho cov stainless hlau reacts sai heev nyob rau hauv oxygen, ib yam li hlau.Qhov txawv yog tias tsuas yog ib txheej nyias ntawm chromium yuav oxidized (feem ntau tsuas yog me ntsis molecule hauv thickness).Incredibly, no nyias txheej ntawm kev tiv thaiv yog heev ruaj.
304L txhuam stainless hlau muaj qhov zoo nkauj zoo nkauj thiab tsis tshua muaj nqi txij nkawm.304L brushed stainless hlau tsis yooj yim rau xeb, yog li nws feem ntau siv hauv cookware thiab zaub mov.Tab sis nws muaj kev cuam tshuam rau cov tshuaj chlorides (feem ntau nyob rau hauv qhov chaw siab salinity).Chloride tsim ib hom kev tiv thaiv corrosion hu ua "corrosion chaw" uas txuas mus rau hauv cov qauv sab hauv.
304 stainless hlau yog qhov siv ntau tshaj plaws stainless hlau hauv ntiaj teb.Nws muaj 16% -24% chromium thiab txog li 35% npib tsib xee - thiab qis carbon thiab manganese.Feem ntau ntawm 304 stainless hlau yog 18-8, lossis 18/8 stainless hlau, uas yog hais txog 18% chromium thiab 8% npib tsib xee.
316 stainless hlau kuj yog ib qho khoom siv dav siv stainless hlau.Nws lub cev thiab txhua yam khoom zoo ib yam li 304 stainless hlau.Qhov txawv yog tias 316 stainless hlau muaj 2-3% molybdenum, uas ua rau kom lub zog thiab corrosion kuj.Feem ntau 300 series stainless hlau tuaj yeem muaj txog li 7% txhuas.
304L thiab 316Lbrushed stainless hlau(raws li lwm yam 300 series stainless hlau) siv npib tsib xee los tswj lawv qhov kub thiab txias zoo nkauj.