Corrosion Behavior of Zirconium Based Alloys in Simulated Body Fluids

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The corrosion behavior of Zr-Ti and Zr-Hf alloys with various concentrations in properly deaerated Hanks’ solution were investigated by electrochemical techniques. The effects of the thermal treatment with the purpose of homogenization of chemical composition on the pitting potentials of the Zr-Ti alloys were also examined. The results indicated that sufficient addition of Ti to Zr improved its corrosion resistance, especially in terms of the pitting potential and the passive current density. On the other hand, addition of Hf totally lowered the corrosion resistance of the alloy. The thermal treatment improved the pitting corrosion property of Zr-Ti alloys, and Zr alloys with over 5mol% Ti showed much higher pitting potentials than that of pure Zr. The treatment also improved the reproducibility of the measurement and narrowed the data scattering. This phenomenon was discussed with the model of rapidly-cooled metallographic structure.

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Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

1489-1492

Citation:

Y. Tsutsumi et al., "Corrosion Behavior of Zirconium Based Alloys in Simulated Body Fluids", Materials Science Forum, Vols. 561-565, pp. 1489-1492, 2007

Online since:

October 2007

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$38.00

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10 20 30 100 Zr Ti.

[1] [2] [3] Unmeasured as-cast with homogenization treatment Pitting potential, Epit /V vs. SCE.

[1] [2] [3] Unmeasured Concentration of additive element /(mol%).

10 20 30 100 Zr Ti/Hf.

[40] Zr-Ti alloy Zr-Hf alloy Fig. 4 Pitting potential of Zr-Ti and Zr-Hf alloy in Hanks' solution at 37°C Fig. 5 Effect of homogenization treatment on pitting potential of Zr-Ti alloy in Hanks' solution at 37°C.

DOI: https://doi.org/10.1201/9781420007282.ch14