1. Sab hauv thiab sab nrauv phab ntsa ntawm kub-dip galvanized steel yeeb nkab yog galvanized, thaum lub txias-galvanized steel yeeb nkab yog tsuas yog sab nrauv phab ntsa galvanized; 2. Cov txheej txheem txias-txheej yog xim thiab qhov tuab zoo heev; qhov kub-dip galvanized txheej yog tuab thiab tsis sib xws. 3. Cov tsos ntawm txias plating yog ci, thiab xim ntawm kub plating yog tsaus dua. 4. Vim tias cov khaub thuas txias ua rau thinner, qhov kev txhim kho corrosion yog qhov tsis zoo; cov txheej txheem kub yog kaum ob zaug ntawm tuab dua li txias txias, thiab nws ua rau txheej txheej nkag nrog lub hauv paus hlau, uas muaj qhov ua tau zoo corrosion.
