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교정용 스테인리스강 선재의 내식성에 미치는 응력 제거 열처리 조건의 영향

Other Titles
 Effect of Stress Believing Heat Treatment Conditions on Corrosion Resistance of Orthodontic Stainless Steel Wires 
 오근택  ;  전용석  ;  황충주  ;  김경남 
 Journal of the Korean Research Society for Dental Materials (대한치과기재학회지), Vol.28(2) : 95-102, 2001 
Journal Title
Journal of the Korean Research Society for Dental Materials(대한치과기재학회지)
Issue Date
heat treatment ; orthodontic wires ; stress relieving ; corrosion resistance ; anodic polarization
Heat treatment is applied to orthodontic wires in order to relieve the stress that results from cold working and the orthodontists manipulations. In this study, 4 types of wires were heat-treated in an air, argon or vacuum environment, and were either cooled in a furnace or a water bath. Corrosion properties of the heat-treated wires were investigated by potentiodynamic method.

The difference of corrosion resistance between the wires heat-treated in an ambient according to cooling methods was not significant. After heat-treated in an ambient, both water-cooled and furnace-cooled wires had a similar and low corrosion resistance. The difference of corrosion resistance between the wires heat-treated in a vacuum environment with cooling methods was significant. After heat-treated in a vacuum, the furnace-cooled wires had high corrosion resistance, but the water-cooled wires low. After heat-treated in a vacuum, argon, or air environments, the water-cooled wires had low corrosion resistance. It was considered because the irregular and unstable film was formed on the surface of the wires when cooled in a water bath. The control wires showed a low current density and high pitting potential, but most of the heat-treated wires did high current density and low pitting potential except for the wire heat-treated in vacuum and then cooled in a furnace.

Conclusively, orthodontic wires are considered to have to be heat treated in vacuum condition or inert gas environment and then to be cooled in a furnace in order to inhibit surface oxidation, minimize the decrease of corrosion resistance and improve the mechanical properties.
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Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Dental Biomaterials and Bioengineering (치과생체재료공학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kyoung Nam(김경남)
Hwang, Chung Ju(황충주) ORCID logo https://orcid.org/0000-0003-3024-4551
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