Feem ntau ntawm corrosion nyob rau hauv cov ntaub ntawv hlau tshwm sim nyob rau hauv atmospheric ib puag ncig, uas muaj corrosion-inducing yam thiab Cheebtsam xws li oxygen, av noo, kub variations, thiab pa phem.Ntsev tshuaj tsuag corrosion yog ib hom kev puas tsuaj heev ntawm atmospheric corrosion.
ntsev tsuag corrosion feem ntau cuam tshuam cov permeation ntawm conductive ntsev tov rau sab hauv ntawm cov ntaub ntawv hlau, ua rau cov tshuaj electrochemical.Qhov no ua rau tsim cov microgalvanic hlwb, nrog rau "tsawg-muaj peev xwm hlau-electrolyte tov-high-potential impurity" configuration.Kev hloov hluav taws xob tshwm sim, thiab cov hlau ua raws li cov anode dissolves, tsim cov tebchaw tshiab, piv txwv li, cov khoom siv corrosion.Chloride ions ua lub luag haujlwm tseem ceeb hauv cov txheej txheem corrosion ntawm ntsev tsuag.Lawv muaj peev xwm nkag mus tau yooj yim, yooj yim infiltrating hlau oxide txheej thiab cuam tshuam cov hlau passivation xeev.Tsis tas li ntawd, chloride ions muaj zog hydration tsawg, ua rau lawv yooj yim adsorb rau cov hlau nto, tshem cov pa oxygen hauv cov txheej txheem hlau oxide tiv thaiv, yog li ua rau cov hlau puas.
Kev kuaj ntsev ntsev yog categorized rau ob hom tseem ceeb: kev sim tshuaj ib puag ncig ntuj thiab kev ua kom nrawm nrawm simulated ntsev tsuag ib puag ncig kuaj.Lub tom kawg siv cov cuab yeej ntsuas, lub npe hu ua lub tshuab tshuaj ntsev ntsev, uas muaj cov ntim tswj tau thiab tsim kom muaj ntsev tsuag ib puag ncig.Nyob rau hauv lub chamber no, cov khoom raug soj ntsuam rau lawv cov tsis kam mus rau ntsev tsuag corrosion.Piv nrog rau tej yam ntuj tso ib puag ncig, cov ntsev concentration nyob rau hauv cov ntsev tsuag ib puag ncig yuav ua tau ob peb zaug los yog kaum ntawm lub sij hawm siab dua, ho tsub kom tus nqi corrosion.Kev kuaj ntsev ntsev ntawm cov khoom tso cai rau lub sijhawm ntsuas luv luv, nrog cov txiaj ntsig zoo li qhov cuam tshuam ntawm ntuj raug.Piv txwv li, thaum nws yuav siv sij hawm ib xyoos los ntsuam xyuas qhov corrosion ntawm cov khoom coj mus kuaj nyob rau hauv ib puag ncig sab nraum zoov, ua tib yam kev ntsuam xyuas nyob rau hauv ib tug artificially simulated ntsev tsuag ib puag ncig tuaj yeem ua tau zoo sib xws hauv 24 teev xwb.
Qhov sib npaug ntawm kev ntsuas ntsev tsuag thiab lub sij hawm ib puag ncig ntawm lub ntuj tuaj yeem raug sau tseg raws li hauv qab no:
24 xuaj moos ntawm kev kuaj tshuaj ntsev nruab nrab ≈ 1 xyoos ntawm kev raug ntuj tsim.
24 teev ntawm acetic acid ntsev tshuaj tsuag tshuaj ntsuam ≈ 3 xyoos ntawm ntuj raug.
24 teev ntawm tooj liab ntsev-accelerated acetic acid ntsev tsuag tshuaj ntsuam ≈ 8 xyoo ntawm ntuj raug.
Post lub sij hawm: Oct-26-2023