高速电弧喷涂Fe基合金陶瓷涂层的耐蚀性

Corrosion resistance of high-speed arc sprayed Fe-based alloy ceramic coatings

为提高海洋设备的耐海水腐蚀性能,采用高速电弧喷涂技术在Q235钢基体上制备Fe基合金陶瓷涂层,并研究有机硅树脂封闭后的耐蚀性。分析了涂层的微观形貌、硬度及电化学性能。结果表明Fe基合金陶瓷涂层组织均匀、结构致密,孔隙率为6.8%,经有机硅封闭处理后涂层的开路电位及腐蚀电位提高,腐蚀电流降低,等效电阻增大,耐腐蚀性能大幅提高。

In order to improve the corrosion resistance of metals under seawater corrosion, Fe-based alloy ceramic coating was fabricated on Q235 steel by high-speed arc spraying technology. Corrosion behavior of the coating was studied after sealed by organic silicon resin. The microstructure, hardness as well as electrochemistry properties were analyzed. The results show that microstructure of the coating is compact and the porosity is 6.8%. After sealed by organic silicon resin, the open circuit potential and the corrosion potential rise, the corrosion current decreases, the equivalent resistance increases, and the corrosion resistance is enhanced greatly.