Anticorrosion Coating using Olea sp. Leaves Extract

3rd International Conference on Science, Technology, and Interdisciplinary Research

自然科学;工业技术

Ikhmal, W.M.K.W.M.^1 ; Yasmin, M.Y.N.^2 ; Fazira, M.F.M.^1 ; Rafizah, W.A.W.^2 ; Wan Nik, W.B.^2 ; Sabri, M.G.M.^1

School of Fundamental Science, Universiti Malaysia Terengganu, Kuala Nerus, Terengganu

21030, Malaysia^1

School of Ocean Engineering, Universiti Malaysia Terengganu, Kuala Nerus, Terengganu

21030, Malaysia^2

关键词: Active compounds;    Electrochemical analysis;    Green corrosion inhibitors;    Inhibition efficiency;    Multiple crack;    Olive leaves;    Potentiodynamic polarization technique;    Stainless steel grades;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/344/1/012028/pdf
DOI  :  10.1088/1757-899X/344/1/012028

来源: IOP

【 摘 要 】

Olive leaves extract (OLE) was evaluated as green corrosion inhibitor for stainless steel grade 316L (SS316L) in several media using scanning electron microscope (SEM), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques. The Fourier Transform Infrared (FTIR) spectroscopy results reveals several active compound indicated by O-H stretch, C=O stretch, C-OH stretch and C-N stretch which can be attributed to oleuropein and hydroxtyrosol acting as the main inhibiting sources for corrosion. The results obtained also show the inhibition efficiency of OLE increase with the increase of OLE concentration. Through its inhibitive action elucidate from the electrochemical analysis, the extract was found to act as a mixed type inhibitor. Micrographs by SEM showed that the surface of steel which has been coated with 0% and 20% of OLE coating extract possess a lot of pin holes or pores while the steel with 10% of OLE coating extract shows the surface has multiple cracks. This study clearly shows the efficiency of OLE as anticorrosion coating for control of stainless steel in marine application.