Electrochemical Corrosion Behaviors of Amorphous Ti 50 Cu x Ni 50−x (x = 30, 20 at.%) Alloys Produced by Using the Quenching Method
Hyun-Goo Kim
Department of Physics Education, Chosun University, Gwangju 501-759, Korea
Hee-Jin Jang ∗
Department of Metallurgical and Materials Engineering, Chosun University, Gwangju 501-759, Korea (Received 20 March 2014 : revised 12 May 2014 : accepted 14 May 2014)
This study was undertaken to examine the electrochemical corrosion properties of amorphous Ti
50Cu
30Ni
20and Ti
50Cu
20Ni
30alloys prepared by using the melt-spinning method under various alloy compositions and value of the solution’s pH. The potentiodynamic polarization showed that the corrosion potential of the Ti
50Cu
30Ni
20alloy was higher than that of the Ti
50Cu
20Ni
30alloyin both pH-2 and pH-7 buffer solutions while the corrosion rate of the Ti
50Cu
30Ni
20alloy was lower than that of the Ti
50Cu
20Ni
30alloy. This is explained by the fact that Cu has a lower dissolution rate than Ni does at the corrosion potential of the alloys.
PACS numbers: 81.65.Kn
Keywords: Amorphous Ti-Cu-Ni alloys, Corrosion potential, Corrosion current density
u
= kò k @o 0 n É; c 8 ý X ¢ R X N Ëù m Ç Ti 50 Cu x Ni 50−x (x = 30, 20 at.%) ¶ ¥ £ ?ô p §8 ý
¹
ÅM × D] K ¡X ì Ä ¼Å k Ä ¤V R Ë
»g ` @¦
¸ @ / < Æ § Ó ü t o §¹ ¢ ¤ õ , F g Å Ò 501-759
ç
¡r ) . > ∗
¸ @ / < Æ § F K5 Å q F « Ñ/ B N < Æõ , F g Å Ò 501-759
(2014¸ 3 Z 4 20{ 9 ~ Ã Î6 £ §, 2014¸ 5 Z 4 12{ 9 Ã º& ñ : r ~ Ã Î6 £ §, 2014¸ 5 Z 4 14{ 9 > F S X & ñ )
Ã
º6 xÓ o_ pH\ É r q & ñ | 9 Ti
50Cu
30Ni
20, Ti
50Cu
20Ni
30½ + ËF K[ þ t (at.%) _ l o < Æ& h  Òd : £ ¤$ í
`
¦ ¸ % i . pH 2 ¢ ¸ H 7 6 xÓ o\ " f  Òd 0 A H Cu < Ê| ¾ Ós © @ /& h Ü ¼ Ð Z } É r Ti
50Cu
30Ni
20½ + Ë F
K _ Â Òd 0 A Ti
50Cu
20Ni
30½ + ËF K Ð ¸F K 8 Z } ¤ ¦ pH 2 6 xÓ o\ " f pH 7 6 xÓ o\ " f Ð Z }
¤ . Â Òd 5 Å q ¸ ¢ ¸ô Ç Ti
50Cu
30Ni
20½ + ËF K _ Â Òd 5 Å q ¸ Ti
50Cu
20Ni
30½ + ËF K _ Â Òd 5 Å q ¸ Ð ¸F K 8
± ú
¤ ¦, pH 7\ " f_ Â Òd 5 Å q ¸ pH 2\ q K @ /^ & h Ü ¼ Ð ± ú ¤ . " f Ti < Ê| ¾ Ós { 9 & ñ ½ + É â Ä º ½ + Ë F
K _ ? /d $ í É r Cu _ < Ê| ¾ Ós Z }` ¦ à º2 ¤ Ä ºÃ º 9, Õ ª ´ òõ H í ß $ í Ð H × æ$ í _ à º6 xÓ o\ " f 8 H כ Ü
¼ Ð Ò q ty ) a .
PACS numbers: 81.65.Kn
Keywords: q & ñ | 9 Ti-Cu-Ni ½ + ËF K, Â Òd 0 A, Â Òd 5 Å q ¸
∗