Effect of carbon content on corrosion resistance of hull steel
The corrosion resistance of hull steel with different carbon content in a simulated tropical ma-rine atmosphere was systematically investigated by optical microscopy,scanning electron microscopy,X-ray diffraction,polarization curve,and electrochemical impedance spectroscopy tests.Results show that carbon reduction can reduce the pearlite content in steel and increase the proportion of α-FeOOH with a stable structure in the corrosion products.Thereby,enhancing the potential of the matrix and im-proving the corrosion product film and charge transfer resistance.Finally,it forms a well-adhered,stable,and dense rust layer with high corrosion resistance.
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