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http://dx.doi.org/10.5574/KSOE.2016.30.5.356

Anti-Corrosion Properties of TiN-Coated Bolt for Application to Nuclear Power Plants Located Near Coastal Areas  

Lee, Su-Been (Department of Materials Engineering, Graduation School, Korea Maritime and Ocean University)
Lee, Jin-Woo (Division of Mechanical Engineering, College of Engineering, Korea Maritime and Ocean University)
Park, Soo-Jeong (Department of Materials Engineering, Graduation School, Korea Maritime and Ocean University)
Kim, Yun-Hae (Division of Mechanical Engineering, College of Engineering, Korea Maritime and Ocean University)
Publication Information
Journal of Ocean Engineering and Technology / v.30, no.5, 2016 , pp. 356-360 More about this Journal
Abstract
Recently, the lifetime extension of nuclear power plants has been considered. Thus, it is necessary to consider facility safety management and economic management. However, when the bolts in nuclear power plants are replaced and the turbines of nuclear power plant are disassembled, numerous problems are found in relation to stuck bolts in clamping parts. In order to solve these problems, a hybrid vacuum chamber was first designed and manufactured. It can perform arc ion plating and sputtering, which were used to deposit Ti/TiN on an A913 B7 bolt. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses were conducted to determine the composition and characteristics of the bolt, and tests were conducted to determine how long the bolt could endure under various conditions in a nuclear power plant. The SEM and XRD results clearly showed a continual and even coating layer. When this TiN-coated bolt is used in a nuclear power plant, the lifetime can be extended compared to a conventional bolt, but it is necessary to determine what additional properties are required.
Keywords
PVD; Plasma arc ion plating; Sputtering;
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