화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.37, 47-56, May, 2016
DOI10.1016/j.jiec.2016.03.006  Export Citation
Evaluation of polyphenol composition and anti-corrosion properties of Cryptostegia grandiflora plant extract on mild steel in acidic medium
Mayakrishnan Prabakaran, Seung-Hyun Kim, Venkatesan Hemapriya1, and Ill-Min Chung†
  • Department of Applied Bioscience, College of Life and Environmental Science, Konkuk University, Seoul 143 701, South Korea
  • 1Department of Chemistry, PSGR Krishnammal College for Women, Coimbatore 641 004, Tamil Nadu, India
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The total phenolic and flavonoid compounds present in Cryptostegia grandiflora leaf extract were analyzed. The results confirmed that the extract contains the Myricetin 3582.22(μg/g) and Rutin 45.62(μg/g) as major components. C. grandiflora extract was evaluated for its anti-corrosion property on mild steel in 1 M H2SO4. A maximum inhibition efficiency of 87.54% was achieved by using 500 ppm of the inhibitor. Polarization studies indicate that the extract acts as a mixed inhibitor. The formation of productive layer on mild steel by inhibitor was confirmed by SEM-EDS and AFM. The extract is adsorbed on the mild steel according to Temkin adsorption isotherm.
Keywords:Cryptostegia grandiflora;Phenolic compounds;Corrosion;Electrochemical studies;Atomic force microscopy
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