Cavitation and electrochemical characteristics of thermal spray coating with sealing material
(1. Division of Marine Engineering, Mokpo Maritime University, Haeyangdaehak-ro 91 Mokpo-Si, 530-729, Korea;
2. Korea Institute of Industrial Technology, 89 Yangdaegiro-gil, Ipjang-myeon, Seobuk-gu, Cheonan-Si, 331-822, Korea;
3. Department of Electronic IT Media Engineering, Seoul National University of Science and Technology, 138 Gongneung-gil, Nowon-gu Seoul, 139-743, Korea)
2. Korea Institute of Industrial Technology, 89 Yangdaegiro-gil, Ipjang-myeon, Seobuk-gu, Cheonan-Si, 331-822, Korea;
3. Department of Electronic IT Media Engineering, Seoul National University of Science and Technology, 138 Gongneung-gil, Nowon-gu Seoul, 139-743, Korea)
Abstract: Steel applied in ocean environment is exposed to corrosion and cavitation and is subject to increasing damages. To prevent this, anti-corrosion thermal spray coating technique is widely used. The low-temperature thermal spray coating was performed with 85%Al-14.5%Zn-0.5%Zr for ship materials and various sealing materials were applied to improve its durability, and the electrochemical behavior and cavitation characteristics were observed. The results show that the sealing improves all the properties of the materials. Hybrid ceramic and fluoro-silicon sealing materials show good electrochemical characteristics, and the fluoro-silicon sealing material shows the best anti-cavitation characteristics.
Key words: thermal spray coating; sealing material; cavitation; electrochemical characteristics