采用密封材料的热喷涂层的空蚀和电化学特征

摘要

抗腐蚀热喷涂技术广泛地运用于防止钢在海洋环境中由于腐蚀和气蚀受到损害.为了改善用于船舶材料的低温热喷涂85％Al-14.5％Zn-0.5％Zr涂层合金的耐久性,对其采用了多种密封材料,并考察其电化学行为和空蚀特征.结果表明:密封材料能改善涂层材料的性能.其中,混合陶瓷和氟-硅密封材料有着良好的电化学性能,并且氟-硅密封材料具有最佳的抗空蚀性能.%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.