Corrosion Inhibition and Adsorption Behavior of Setaria verticillata Leaf Extract in 1M Sulphuric Acid

详细信息    查看全文

• 作者：P. Muthukrishnan (1)
  B. Jeyaprabha (2)
  P. Prakash (1)
  
• 关键词：acid corrosion ; mild steel ; polarization ; SEM ; Setaria verticillata
• 刊名：Journal of Materials Engineering and Performance
• 出版年：2013
• 出版时间：December 2013
• 年：2013
• 卷：22
• 期：12
• 页码：3792-3800
• 全文大小：
• 作者单位：P. Muthukrishnan (1)
  B. Jeyaprabha (2)
  P. Prakash (1)
  
  1. Department of Chemistry, Thiagarajar College, Madurai, 625009, India
  2. Department of Civil Engineering, Fatima Michael College of Engineering & Technology, Madurai, 625020, India
  
• ISSN：1544-1024

文摘

Setaria verticillata leaf extract (SVLE) as corrosion inhibitor in 1M H2SO4 was investigated by weight loss techniques and electrochemical techniques at 308-328?K. Inhibition efficiency of SVLE was found to increase with increasing concentration but decreased with temperature. Polarization measurements revealed that SVLE acted as mixed-type inhibitor. Impedance diagrams showed that increasing of SVLE concentration increased charge transfer resistance and decreased double layer capacitance. The adsorption of SVLE on the mild surface obeyed the Langmuir adsorption isotherm. Protective film formation against corrosion was confirmed by SEM and FTIR.