摘要
利用电化学方法和微观测试手段,研究了冷喷涂Zn-50Al涂层在天然海水环境中的耐蚀性能。研究表明,与纯锌、纯铝涂层相比,对于钢基体,锌铝复合涂层具有更加合适的阴极保护电位,可以大大提高防护寿命;海水环境中涂层表面会形成一层致密稳定的腐蚀产物膜,能有效阻止腐蚀介质向涂层内部的渗透,涂层会保持在一个较低的腐蚀速度。
The corrosion behaviors of the cold-sprayed Zn-50Al coatings in seawater were characterized by potentiodynamic polarization and electrochemical impedance spectroscopy（EIS） techniques.The X-ray diffraction（XRD） results of corrosion products and scanning electron microscopy（SEM） analysis of corrosion surface were used to comparatively investigate the corrosion properties of Zn/Al coatings,and to study the self-sealing mechanism.The results indicated that the better corrosion resistance of cold-sprayed Zn-50Al coatings compared with Zn coatings due to the better self-sealing effect which effectively prevents further seawater corrosion.It has more appropriate cathodal protection potential than Al coatings and low corrosion rate than Zn coatings,the corrosion rate of the Zn-50Al coatings retained a low level with time.
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2010年第1期62-66,共5页
Journal of Chinese Society For Corrosion and Protection
关键词
冷喷涂
Zn/Al涂层
电化学
耐蚀性能
cold-sprayed
Zn/Al coatings
electrochemistry
corrosion resistance
