Qhov sib txawv ntawm cov kav hlau kav hlau K7, K8 thiab K9

K7, K8, thiab K9 qhia txog thawj phab ntsa tuab qib rau cov ducts, nrog rau qhov sib txawv tseem ceeb ntawm lawv cov phab ntsa txawv. Ntawm cov no, K9-qib cov kav hlau kav hlau muaj cov phab ntsa tuab zoo dua thiab txhim kho siab- cov kabmob muaj peev xwm, ua rau lawv tsim nyog rau cov xwm txheej xav tau siab dua. Cov kev hloov pauv hauv kev tiv thaiv corrosion ntawm cov qib no tsis tsuas yog txiav txim siab los ntawm kev faib tawm tab sis raug cuam tshuam los ntawm ntau yam xws li phab ntsa thickness, cov khoom muaj pes tsawg leeg, thiab tiv thaiv - cov txheej txheem kho corrosion. Raws li kev tsim qauv, cov kav hlau hlau muaj plaub txheej: ib qho kev tiv thaiv sab nraud -corrosion system featuring ob- txheej zinc txheej thiab txheej tiav, txheej txheej nruab nrab cam khwb cia hlau, thiab cov txheej txheem sab hauv los tiv thaiv corrosion uas muaj cov cement hauv ob sab phlu. Raws li tau piav qhia hauv qab no:

Qhov kev tiv thaiv corrosion ntawm cov kav hlau kav yog los ntawm kev tiv thaiv- kev kho corrosion siv rau ob qho tib si sab hauv thiab sab nrauv. Cov txheej txheem sab hauv muaj xws li cov cement hauv ob sab phlu (ib txwm cement / alumina cement), thaum kev tiv thaiv sab nraud muaj zinc txheej ntxiv rau kev tiv thaiv tiav (asphalt xim / epoxy resin xim). Cov kev ntsuas no txhim kho cov yeeb nkab kev tiv thaiv corrosion, txo qis kev sib cuag ncaj qha ntawm dej thiab av nrog cov txheej txheem hlau cam, yog li txuas lub raj xa dej txoj kev pab cuam lub neej.