1. Ntev npaum li cas tooj liab kav ntev?
PH-PHEEJ: Tooj yog tiv taus corrosion hauv nruab nrab lossis me ntsis alkaline dej (pH 6.5-8.5). Cov dej acidic (pH <6.5) tuaj yeem ua rau "pitting corrosion," maj mam ua lub raj raj thiab luv luv lub neej thiab ua kom luv luv li 20-40 xyoo hauv cov neeg mob hnyav.
Cov ntxhia cov ntsiab lus: Cov dej nyuaj nrog qib muaj calcium lossis cov qib magnesium tuaj yeem ua cov nplai tiv thaiv sab hauv, qeeb corrosion. Hloov siab, cov dej muag (cov ntsiab lus ntxhia (tsawg dua cov ntxhia cov ntsiab lus hauv kev ua kom huv.
Chlorine / chloramine: Kev kho mob hauv nroog feem ntau siv chlorine lossis chloramine, uas, nyob rau lub sijhawm tawv nqaij kom dhau, tshwj xeeb tshaj yog cov kab dej sov.
Raug rau cov khoom: Cov kav dej nruab sab hauv tsev (tiv thaiv los ntawm cov noo noo, av, lossis qhov ntev ntev dua cov av lossis faus rau hauv av. Ferried kav yuav corrode sai yog tias cov av yog acidic, qab ntsev, lossis muaj cov sulfates.
Qho so: Cov kav dej kub feem ntau muaj lub neej luv (50-70 xyoo) dua li cov kav dej txias (60 - {{xyoo) vim tias cua sov accelerations uas ua rau corrosion.
Kev ua hauj lwm: Cov kev teeb tsa tsis zoo (piv txwv li, siv tawv me me, lossis kev puas tsuaj thaum haum) tuaj yeem tsim cov ntsiab lus ntxhov siab lossis txi.
Txheem tooj liab kav (hom m, thinner phab ntsa) muaj ntau nyob hauv cov kav dej uas muaj cov kav dej thiab feem ntau xeem 50-70.
Hnyav-kav dej (hom L lossis K, This Theater) yog cov tiv taus ntau dua rau kev corrosion thiab siab, tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej zoo tshaj plaws.
2. Puas yog tooj liab kav kav 100 xyoo?
Dej Zoo yog qhov zoo tshaj plaws: Nruab nrab PH, qis acidity, thiab tswj cov qib ntawm cov chlorine lossis cov zaub mov tsis txaus ntseeg kom ntau dhau ntawm kev txhim kho corrosion. Muaj ntau thaj tsam uas muaj dej khov nab tseem ceeb tshaj plaws cepper kav kav ntev li ib puas caug xyoo lossis ntev dua nyob rau hauv cov tsev nyob thiab ua lag luam.
Cov kav dej tau raug ntsia kom zoo: Siv cov qib tuab ntawm cov qib (hom L lossis K), zam kev raug cov av tsis muaj av lossis ua kom muaj kev ruaj ntseg, kev ntxhov siab.
Txij nkawm yog xwm yeem: Kev tshuaj xyuas ib txwm mus rau kev daws teeb meem, hloov cov dej ua kom zoo, lossis kho cov dej (piv txwv li, nruab nrab acidic dej nrog lub lim dej) tuaj yeem txuas lub neej ntev.
