《Table 4.Corrosion parameter fitting results from the corrosion polarization curves》

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《Wear and corrosion resistance of laser-cladded Fe-based composite coatings on AISI 4130 steel》

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To further study the corrosion resistance of the specimens，potentiodynamic polarization tests were conducted and the results are shown in Fig.13.The anodic and cathodic Tafel slopesβa andβc，respectively，were acquired from the intersection of the anodic and cathodic Tafel curve tangents using the Tafel extrapolation method.The corrosion fitting parameters Ecorr，Jcorr，and Rp are extracted from the polarization curves and are listed in Table 4.It is known that the Ecorr values of the Fe-based cladding layers are more positive than those of the substrate under identical corrosion conditions，and the corrosion resistance（Rp）values of the cladded coatings are much higher than those of the substrate by about 19.37 times（No.1）and 5.04 times（No.2）.