Nkoj daim hlau yog steel phaj siv los tsim cov nkoj hull. Lawv tsuas yog ua los ntawm steel, aluminium alloy, fiberglass thiab lwm yam ntaub ntawv. Cov hauv qab no yog cov ntaub ntawv tshwj xeeb txog qee cov khoom siv nkoj nkoj
Steel nkoj daim hlau yog cov khoom siv hull tshaj plaws. Lawv yog tsim los ntawm hlau, carbon thiab ib tug me me ntawm alloy ntsiab. Lawv muaj lub zog siab, zoo plasticity thiab corrosion kuj, tab sis hnyav.
Aluminium alloy nkoj daim hlau yog lub teeb yuag, cov ntaub ntawv muaj zog, feem ntau yog ua los ntawm txhuas, magnesium, silicon thiab lwm yam khoom. Lawv yog lub teeb hauv qhov hnyav thiab muaj kev tiv thaiv corrosion zoo, tab sis lawv kim dua thiab muaj kev cuam tshuam tsis zoo.
Fiberglass nkoj daim hlau yog cov khoom siv tsis yog xim hlau, feem ntau yog tsim los ntawm iav fiber ntau thiab cob. Lawv muaj cov yam ntxwv ntawm lub teeb yuag, zoo corrosion kuj thiab zoo cuam tshuam tsis kam, tab sis lawv kim dua thiab tsis zoo kub tsis kam.
Tsis tas li ntawd, lub nkoj nkoj kuj yog ua los ntawm cov ntoo. Txawm hais tias lawv yog lub teeb yuag, pheej yig thiab yooj yim rau kev tsim kho, lawv muaj kev ua haujlwm tsis zoo thiab cua tsis kam. Kev xaiv ntawm nkoj plating nyob ntawm seb hom nkoj, kev siv ib puag ncig thiab kev tsim qauv.
