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Anti-Corrosion Coating Using Andrograpis paniculata (Kalmegh) Leaves
Extract on Stainless Steel
Muhammad Amiruddin bin Abd Razak
Supervisor: Dr Mohd Sabri Bin Mohd Ghazali
Bachelor of Applied Science (Electronics and Instrumentation Physics)
School of Ocean Engineering
This study found out the effect of Kalmegh leaves extract in EA9 Finish HB paint for
stainless steel on corrosion resistance in marine life. The corrosion performance of
stainless steel 316L was investigated in the natural seawater. The analysis has been
conducted by using FTIR, SEM and EIS. FTIR analysis was used to identify the active
constituents in Kalmegh leaves extract. The existence of major active functional group
of Andrographolide gives impact in the inhibition activity. The main component that
can be found in Andrographolide structures are phenols O-H, carboxylic acid C=C and
alkanes C-H. The surface morphology of stainless steel shows severe damage as a
result of corrosion process. EIS was applied to investigate the inhibition behaviour on
stainless steel in different concentration of Kalmegh leaves extract. The results show
that corrosion rate of stainless steel increase in the increases of days and decrease in
the increases of Kalmegh leaves extract concentration in formulation of paint.
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