Cov khoom siv hluav taws xob yeej muaj zog yog cov chaw tsim khoom ntawm ncej kab kho vajtse thiab kis tau tus mob accessories. Qhov ib txwm nto ntawm cov khoom no yog kub dip galvanized. Cov tshuaj tsuag ntsev yog ib txoj hauv kev tseem ceeb los ntsuas qhov kev tiv thaiv corrosion Cov hauv qab no yog cov txheej txheem tseem ceeb thiab cov txheej txheem ntawm kev ntsuas ntsev tsuag.
Method
Neutral salt spray test (NSS test): Qhov no yog ib qho kev sim ua kom nrawm nrawm dua. Qhov ntsuas kub feem ntau yog teem rau ntawm 35 degree. Tus nqi pH ntawm cov tshuaj brine yog kho nyob rau hauv nruab nrab ntau yam (6.5 ~ 7.2), thiab tus nqi ntawm cov ntsev tsuag yuav tsum nyob nruab nrab ntawm 1 ~ 3ml / 80cm²·h.
Acetate spray test (ASS test): Nyob rau hauv txoj kev no, glacial acetic acid yog ntxiv rau sodium chloride tov, kom pH tus nqi ntawm cov tshuaj txo mus txog 3, yog li tsim ib tug acidic ntsev tsuag. Tus nqi corrosion ntawm txoj kev no yog kwv yees li 3 zaug sai dua li ntawm NSS test3.
Copper ntsev accelerated acetate spray test (CASS test) : Qhov no yog kev kuaj ntsev ntsev sai dua, qhov ntsuas kub yog 50 degree, los ntawm kev ntxiv me me ntawm tooj liab ntsev - tooj liab chloride rau hauv cov ntsev ntsev kom muaj zog ua kom xeb. Nws tus nqi corrosion yog li 8 npaug ntawm NSS test 3.
Alternating ntsev tsuag tshuaj ntsuam: Qhov no yog ib qho kev ntsuam xyuas ntsev tsuag, uas ua ke nrog nruab nrab ntsev tsuag tshuaj ntsuam thiab qhov ntsuas kub ntub dej tas li. Qhov kev sim no tsuas yog siv rau cov kab noj hniav hom tshuab cov khoom, los ntawm kev nkag mus ntawm qhov chaw tidal, kom cov ntsev tsuag corrosion tsis yog tsuas yog tsim rau ntawm qhov chaw ntawm cov khoom, tab sis kuj nyob rau hauv cov khoom.
Ckev cai
Kev ntsuam xyuas pom: Kev ntsuam xyuas cov ntsiab lus yog ua raws li cov yam ntxwv ntawm corrosion ntawm qhov chaw ntawm cov qauv kuaj, xws li xeb, blistering, tev, discoloration, thiab lwm yam.
Txoj kev poob phaus: Tus nqi corrosion yog ntsuas los ntawm kev ntsuas qhov loj ntawm cov qauv.
Corroded cheeb tsam feem pua: xam qhov feem pua ntawm tag nrho cov cheeb tsam ntawm qhov chaw corroded tom qab kuaj.
