The corrosion is a major limiting factor for steel in the harsh environments and can be controlled by depositing protective passive coatings. Nickel-based alloy cladding of steel offers a solution by enabling better wear and corrosion resistance, and high bonding strength. The laser surface cladding of steel was conducted using a high-power direct diode laser. Layers of tungsten carbide in Ni (40% Ni-60% WC) combined with 1 and 2% lanthanum oxide (La2O3) and cerium oxide (CeO2) were deposited on ASTM A36 steel substrate. The X-ray diffraction and scanning electron microscopy were employed to study the morphology, microstructure, and phase evaluation of the cladded layer. Further, anodic polarization on the laser-cladded coupons in 3.5 wt% NaCl shows significant enhancement of the corrosion resistance. The addition of La2O3 and CeO2 improves the corrosion resistance and the hardness of the clad.
The International Journal of Advanced Manufacturing Technology – Springer Journals
Published: Jun 6, 2018
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