摘要
在室温条件下将AZ91D镁合金置于Mg(NO3)2溶液中,分别采用阴极恒电位和恒电位脉冲两种模式电化学沉积制备Mg(OH)2薄膜。用扫描电子显微镜(SEM)及X射线衍射(XRD)对薄膜进行微观形貌观察和物相结构分析,用动电位极化方法研究了Mg(OH)2薄膜在3.5%NaCl溶液中的耐腐蚀性能。结果表明,在两种条件下制备的Mg(OH)2薄膜表面均匀致密、没有明显的缺陷;与用阴极恒电位沉积的Mg(OH)2薄膜相比,用恒电位脉冲沉积的Mg(OH)2薄膜更均匀致密,耐腐蚀性能更高。
Mg(OH)2films were electrodeposited on the surface of AZ91 D magnesium alloys in Mg(NO3)2solutions at room temperature using cathodic potentiostatic and potentiostatic-pulse methods respectively. The characteristics of the Mg(OH)2films were investigated by scanning electronic microscope(SEM) and X-ray diffraction(XRD). The corrosion resistance of the films was evaluated using potentiodynamic polarization tests. The results show that the Mg(OH)2films are uniform and compact without obvious defects. Mg(OH)2films enhanced the corrosion resistance of the AZ91 D alloy. The Mg(OH)2film deposited by potentiostatic pulse method was superior to that deposited by potentiostatic method in terms of uniformity and compactness and corrosion resistance.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2014年第9期703-709,共7页
Chinese Journal of Materials Research
基金
甘肃省科技计划1010RJZA045
兰州理工大学博士基金
中国科学院"百人计划"资助项目~~
关键词
材料失效与保护
Mg(OH)2薄膜
电化学沉积
恒电位脉冲
耐蚀性
materials failure and protection
Mg(OH)2films
electrochemical deposition
potentiostatic pulse
corrosion resistance
