Abstract
In order to study the effect of nickel ion implantation on aqueous corrosion behavior, samples of Zircaloy-4 were implanted with nickel ions with fluences ranging from to using a metal vapor vacuum arc source operated at an extraction voltage of 40 kV. The valence states and depth distributions of elements in the surface of the samples were analyzed by X-ray photoelectron spectroscopy and Auger electron spectroscopy, respectively. Transmission electron microscopy was used to examine the microstructure of the nickel-implanted samples. The potentiodynamic polarization measurement was employed to evaluate the aqueous corrosion resistance of Zircaloy-4 in a 0.5 M solution. It was found that significant improvement was achieved in the aqueous corrosion resistance when the fluence is For fluences greater than the corrosion resistance of the implanted zirconium decreased compared with that of as-received Zircaloy-4; the higher the fluence, the worse the corrosion resistance. The mechanism of the corrosion behavior of the nickel-implanted Zircaloy-4 is discussed. © 2004 The Electrochemical Society. All rights reserved.
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