摘要
采用极化曲线和交流阻抗技术研究了尿酸自组装膜对Ni在3%NaCl溶液中的缓蚀行为。结果表明,尿酸属于阳极型缓蚀剂,随着尿酸浓度的变化、组装时间和尿酸溶液pH值的不同,缓蚀效率有所不同。当尿酸浓度为0.8 mmol/L、溶液pH=9.0、组装时间为12 h时电极的腐蚀电流密度最小,缓蚀效率最高,达到95.7%。
The corrosion inhibition effect of the uric acid self-assembled film on nickel in 3% NaCl solution was studied by electrochemical methods. The experimental results showed that uric acid inainly suppressed the anodic reaction and its inhibition efficiency was different with the variation of uric acid concentration, self-assembled time as well as the pH value of uric acid solution. When the nickel electrode was modified with 0.8 mmol/L uric acid for 12 h at pH 9.0, the corrosion current density of the electrode was the lowest and the inhibition efficiency reached the highest value of 95.7%.
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2009年第2期145-148,共4页
Journal of Chinese Society For Corrosion and Protection
基金
重庆市自然科学基金重点项目(CSTC-2004BA4024)
关键词
尿酸
Ni电极
交流阻抗
缓蚀剂
uric acid, nickel electrode, electrochemical impedance, corrosion inhibitor
