TusROUNDING NTAWM HLAUyog aTshuaj Lom Zemuas hlau reacts nrogpathiabya raws (dej)Los ntawm ib puag ncig los uaHlau oxides, feem ntau hu uaxebCov. Qhov no yog ib qho piv txwv ntawm ibElectrochemical corrosiontxheej txheem.
🔬 Tshuaj sib npaug ntawm xeb:
4fe +3}}}} → h2o → 4 this}} h}}}} o {o} txoj cai 4FE (Oh) {_34 fe} fe +3 → 4fe (Oh) 3Tom qab ntawd:
Fe (OH) 3 → Fe2o3⋅xh2O (Hydrated Hlau (III) Oxide, lossis REW}} {} {{{{) oxide (III) Oxide, lossis Rust}) Fe (Oh) 3 → Fe2o3⋅XH2O (Hydrated Hlau (III) Oxide, lossis xeb)⚙️ Cov kauj ruam hauv cov txheej txheem xeb:
Noo noo thiab oxygen Hu:
Hlau yog nthuav tawm cov dej (txawm tias tsuas yog av noo) thiab cov pa oxygen los ntawm huab cua.
Tsim ntawm cov hlau ions:
Ntawm qhov chaw Anodic, Hlau Loses tshuab hluav taws xob (oxidation):
Fe → Fe 2++2 e-Fe-Fe-Le-Fe-{{{{{-fe → {-fe → {{4 {4} e-Kev txo cov pa oxygen:
Ntawm Cathodic cov chaw, Oxygen reacts nrog dej thiab cov hluav taws xob tso tawm:
O {2+4 e - {{{} {} {} {{{{{{{{} h2o → 4o → 4o → 4oQuav Tsim:
Hlau ions (Fe {{{{}} fe} fe {{}}}}}} ion -h -h-) sib txuas ua keHlau Hydroxides, uas txuas ntxiv oxidize rau hauvhydrated hlau oxides (xeb).
🌧️ Yam uas nrawm xeb:
Muaj dej thiab oxygen
Acidic Los Yog Qab Zib Ib puag ncig(xws li, seawater, acid los nag)
Electrolytes(nce kev mus ncig ion)
Nto tsis xws luag los yog khawbNtawm Hlau
🔐 Kev Tiv Thaiv Txoj Kev:
Painting los Txheej(blocks noo noo / Oxygen)
Galvanization(zinc txheej uas tua nws tus kheej)
Alloying nrog chromium(piv txwv li, hlau stainless)
Cathodic Kev Tiv Thaiv(Txuas cov hlau ntxiv)
🧪 Cov ntsiab lus:
Rowing yog ibElectrochemical Oxidationntawm cov hlau nyob rau hauv lub xub ntiag ntawm cov dej thiab oxygen, ua flaky, liab-xim avHlau oxidesuas tsis muaj zog hlau qauv dhau sijhawm.
Koj puas xav tau ib daim duab yooj yim los qhia txog cov xeb xeb?
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