Thaum lub sijhawm ua haujlwm ntawm kev tiv thaiv cathodic, cov laj thawj tseem ceeb ntawm cov kav dej xau yog raws li hauv qab no:
① Kev tsim kho tsis raug, cov kav dej hla tsis yog tus qauv. Thaum cov kav dej tiv thaiv hla lub kav dej tsis muaj kev tiv thaiv, qhov sib nrug ntawm ob lub kav dej tsis ua raws li qhov yuav tsum tau ua vim kev tsim kho tsis raug. Tom qab muab faus rau ib lub sijhawm, cov txheej txheem rov qab ntawm cov av hloov pauv, thiab ob lub kav dej tau sib tshooj ua ke kom tawg cov txheej txheem tiv thaiv corrosion. Kev sib cuag hlau ntawm ob lub raj xa dej ua ib qho chaw xau.
② Rwb thaiv tsev flange tsis ua hauj lwm los yog to. Rau qhov yooj yim ntawm kev tswj hwm, qhov chaw tiv thaiv cathodic feem ntau yog ua ke nrog lub chaw nres tsheb, thiab cov kav dej tiv thaiv yog nruab nrog cov flanges insulated hauv thiab tawm ntawm qhov chaw nres tsheb. Thaum cov kav dej xa khoom nruab nrab muaj cov impurities conductive, xau rau hauv qhov chaw nres tsheb thiab cov kav dej tsis muaj kev tiv thaiv. Yog hais tias cov insulating flange zoo tsis zoo, tom qab lub rwb thaiv tsev qhov chaw raug puas tsuaj thaum siv, cov yeeb nkab tiv thaiv thiab cov yeeb nkab tsis tiv thaiv yuav txuas nrog hluav taws xob, uas ua rau muaj qhov txhaum cai.
③ Los ntawm qhov kev puas tsuaj ntawm txheej txheej anticorrosive. Nyob rau theem tom ntej ntawm kev ua haujlwm kav dej, qhov nce ntawm qhov kev puas tsuaj yuav ua rau cov kav dej xau.
