Oxide Film Formation Mechanism

 

Ntuj oxidation txheej txheem: Thaum lub phaj hlau alloy raug huab cua, cov hlau atoms ntawm nws qhov chaw yuav muaj tshuaj lom neeg nrog cov pa oxygen hauv huab cua. Siv hlau - alloy ua piv txwv. Hlau atoms (Fe) yuav hnov ​​​​mob nrog oxygen (O₂) los tsim cov oxide zaj duab xis uas nws cov khoom tseem ceeb yog ferric oxide (Fe₂O₃) thiab ferro - ferric oxide (Fe₃O₄). Qhov no yog txheej txheem oxidation ntuj. Cov kev sib npaug tshuaj yog ₂₂₃ thiab ₂₃₄. Thaum cov txheej txheem no, cov hlau atoms poob electrons thiab oxidized, thiab cov pa oxygen tau txais electrons.

 

Alloy Element kev koom tes: Yog tias cov hlau hlau phaj muaj cov ntsiab lus hlau xws li chromium (Cr) thiab txhuas (Al) uas yooj yim tsim oxides ruaj khov, cov ntsiab lus no yuav nyiam cov pa oxygen. Piv txwv li, chromium tuaj yeem hnov ​​​​mob sai sai nrog cov pa hauv huab cua los tsim chromium oxide (Cr₂O₃), thiab cov tshuaj sib npaug yog ₂₂₃. Cov chromium oxide zaj duab xis yog tuab heev thiab tuaj yeem tiv thaiv cov pa oxygen thiab lwm yam corrosive media los ntawm kev sib txuas ntxiv ntawm cov hlau hauv cov hlau phaj, yog li ua lub luag haujlwm tiv thaiv.

 

 

 

Qib	Mechanical Property
	Tensile zog (MPa)	Yield zog (MPa)	% Elongation hauv 2 nti (50mm) min	Impacting Test Temperature (degree)
CCS A	400-520	235	22	20

 

 

 

 

 

Cov txheej txheem Electrochemical - Pab: Los ntawm kev xav ntawm electrochemical, passivation yog txheej txheem nyuaj. Nyob rau hauv ib tug haum nruab nrab, anodic polarization yuav tshwm sim nyob rau saum npoo ntawm alloy steel phaj. Thaum lub polarization muaj peev xwm nce mus txog ib qho nqi, tus nqi ntawm cov tshuaj tiv thaiv anodic (xws li cov hlau tawg) ntawm cov hlau saum npoo yuav dheev txo qis vim tias cov yeeb yaj kiab tiv thaiv passivation yog tsim rau ntawm cov hlau. Cov zaj duab xis passivation no tuaj yeem yog hlau oxide, hydroxide, lossis ntsev. Piv txwv li, nyob rau saum npoo ntawm ib co hlau hlau phaj uas muaj chromium thiab npib tsib xee, cov zaj duab xis passivation tej zaum yuav yog ib tug complex sib tov ntawm chromium oxide, npib tsib xee oxide, thiab lawv hydroxides. Cov yeeb yaj kiab no tuaj yeem tiv thaiv cov hlau tawg ntxiv thiab corrosion.

 

Tus Kheej Kho Mechanism: Cov zaj duab xis passivation nyob rau saum npoo ntawm qee cov hlau hlau phaj kuj muaj kev kho tus kheej. Thaum cov yeeb yaj kiab passivation raug puas tsuaj hauv zos (xws li khawb lossis hauv zos eroded los ntawm qhov nruab nrab corrosive), nyob rau hauv ib puag ncig tsim nyog, cov ntsiab lus hauv cov hlau yuav hnov ​​​​mob nrog rau qhov nruab nrab ib puag ncig rov ua cov yeeb yaj kiab passivation. Piv txwv li, rau cov hlau hlau phaj uas muaj chromium, thaum lub passivation zaj duab xis nyob rau saum npoo puas lawm, lub chromium keeb yuav hnov ​​​​mob nrog cov pa oxygen nyob rau hauv cov huab cua los yog cov oxidizing tus neeg saib xyuas nyob rau hauv ib puag ncig cov tshuaj electrolyte rau regenerate chromium oxide thiab kho cov kev ncaj ncees. zaj duab xis passivation.

 

 

 

 

 

Vim li cas thiaj xaiv peb?
Peb txaus siab rau peb lub peev xwm los muab cov kev cai daws teeb meem rau peb cov neeg siv khoom cov kev xav tau tshwj xeeb.
Peb txheeb xyuas thiab sib piv cov khoom dhau los thiab cov xwm txheej tam sim no ntawm peb 18mm Thickness Kub Rolled Mild Steel Phaj CCS-A, thiab tsim cov txheej txheem tshiab thiab cov txheej txheem.
Peb cov neeg siv khoom ntseeg peb kom xa cov khoom zoo Cold-rolled Steel khoom raws sijhawm thiab ntawm kev siv nyiaj.
Peb nruj me ntsis siv cov kev pab cuam sov so thiab kev xav tom qab muag, ua raws li kev txhim kho kev ua haujlwm zoo.
Peb muab ntau hom Cold-rolled Steel khoom kom tau raws li cov neeg siv khoom xav tau.
Peb ua raws li cov neeg siv khoom-centric thiab hom-taw qhia kev lag luam lub tswv yim, thiab txuas ntxiv muab cov neeg siv khoom txhim khu kev qha thiab cov khoom zoo thiab cov kev pabcuam.
Peb lub Hoobkas tau cog lus los txhawb nqa cov qauv siab tshaj plaws ntawm kev nyab xeeb thiab zoo.
Txhua tus neeg ua haujlwm ntawm peb lub tuam txhab thiab txhua lub tuam haujlwm ua haujlwm ua ke los ua ke kev tswj hwm kev lag luam, kev tshaj lij thev naus laus zis, kev txheeb cais ntau thiab kev kawm ideological.
Peb cov khoom siv Cold-rolled Steel paub txog lawv cov kav ntev thiab kev ntseeg tau.
Relying ntawm superior tej yam kev mob thiab muaj zog zoo ntawm cov khoom loj, peb muaj peev xwm ua tau raws li qhov sib txawv ntawm peb cov neeg muas zaub.

Cim npe nrov: 18mm thickness kub dov me steel phaj ccs-a, Tuam Tshoj 18mm thickness kub dov me steel phaj ccs-a lwm tus neeg, hoobkas