한국표면공학회지 (54권2호 71-76)
Effect of Neodymium concentration on electrochemical properties of 925 silver
Ag925의 전기화학적 특성에 미치는 네오디뮴 함량의 영향
신병현 a , 정승진 b , 정원섭 b*
Byung-Hyun Shin a , Seungjin Jung b , and Wonsub Chung b*
a부산대학교, 재료공학과, 소재기술연구소 b부산대학교, 재료공학부
a The Institute of Materials Technology, Departments of Materials Science and Engineering, Pusan National University, Busan 609-735, Republic of Korea bSchool of Materials Science and Engineering, Pusan National University, Busan 609-735, Republic of Korea
Ag925, silver with added copper, is popular alloy due to its low price. However, it has a difficult to use because of the low corrosion resistance. In various alloys, neodymium (Nd) works as an element to improve corrosion resistance by reacting with interstitial elements in the alloy. When 1.5 wt. % Neodymium was added to Ag925, the potential on the activated polarization in a potentiodynamic polarization test was increased from -0.15 V to –0.05 V. Ag925 with added neodymium showed the passivation after activation polarization. But When the potential increased around 50 mV, the current density is increased to 3 x 10-3. Ag925 with the 1.5 wt. % Nd had the low corrosion rate.
Silver, Neodymium, Electrochemical properties, Potentiodynamic polarization curve, Electrochemical impedance spectroscopy
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