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Hlau Ntsia
Cov ntsia hlau niaj hnub no feem ntau yog ua los ntawm cov hlau, feem ntau dipped los yog coated los tiv thaiv corrosion nyob rau hauv hnyav hnyav los yog txhim kho adhesion.Cov ntsia hlau zoo tib yam rau cov ntoo feem ntau yog cov mos mos, cov pa roj carbon tsawg lossis "mob" steel (kwv yees li 0.1% carbon, cov hlau seem thiab tej zaum ib qho kab ntawm silicon lossis manganese).Cov ntsia hlau rau pob zeb yog qhov nyuaj, nrog 0.5-0.75% carbon.
