Abstract
One of the main drawbacks of 6061 Al/SiCP is its poor pitting corrosion resistance in the aggressive environment containing chloride ions, such as seawater, for example. The present article deals with the in- vestigations of effects of aging on the corrosion behavior of 6061 Al/SiCP and of the heat treatment on the pitting corrosion resistance of 6061 Al/SiCP coated by cerium oxide prepared by chemical bath technique. Potentiodynamic polarization test was used to study the corrosion behavior of cerium oxide coatings in 3.5N NaCl solution. The microstructure of cerium oxide was examined by scanning electron microscopy (SEM) and the formed phases were identified by X-ray diffraction (XRD). The pitting corrosion resistance of the cerium oxide coating was found to be improved after heat treatment at 300 0C for 30 min.