Xeb yog qhov tshwm sim ntawm corroding steel tom qab cov hlau (Fe) tau raug cov pa oxygen thiab noo noo (piv txwv li, av noo, vapor, immersion). … Oxygen ua rau cov electrons sawv thiab tsim hydroxyl ions (OH). Cov hydroxyl ions hnov mob nrog FE⁺⁺ los ua hydrous hlau oxide (FeOH), paub zoo li xeb.
Vim li cas hlau thiaj xeb sai?
Xeb yog tshuaj lom neeg cov tshuaj tiv thaiv uas muaj kev sib pauv ntawm electrons ntawm atoms; Qee cov tshuaj tuaj yeem ua kom xeb los ntawm kev ua kom cov hluav taws xob ua haujlwm ntawm hlau thiab oxygen. Cov tshuaj xws li ntsev thiab kua qaub nce cov dej noo nyob ib puag ncig hlau, ua rau xeb tshwm sim sai dua.
Yuav ua li cas kom cov hlau tsis txhob xeb?
Galvanize: Galvanizing coats hlau lossis hlau hauv zinc los tiv thaiv xeb. Zinc corrodes ntawm tus nqi qeeb dua li hlau lossis hlau, yog li nws muaj txiaj ntsig zoo rau kev qeeb xeb. Blueing: Cov txheej txheem no tsim ib txheej ntawm magnetite hla cov hlau kom tiv thaiv xeb.
Dab tsi ua rau cov hlau corrode?
Causes of Corrosion
Hlau corrodes thaum nws hnov mob nrog lwm yam khoom xws li oxygen, hydrogen, hluav taws xob tam sim no lossis txawm tias av thiab kab mob. Corrosion kuj tuaj yeem tshwm sim thaum cov hlau zoo li cov hlau tau muab tso rau hauv kev ntxhov siab ntau dhau ua rau cov khoom tawg.
Yuav ua li cas hlau xeb yooj yim?
Hlau corrodes sai sai nyob rau hauv acidic ib puag ncig thiab maj mam los yog tsis tag nrho raws li alkalinity nce. Tus nqi corrosion ntawm cov hlau hauv av tuaj yeem nyob ntawm tsawg dua 0.2 microns hauv ib xyooshauv cov xwm txheej zoo rau 20 microns ib xyoos lossis ntau dua hauv cov av hnyav heev.
