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Title Carbon nanodots synthesized from chitosan and its application as a corrosion inhibitor in boat‑building carbon steel BIS2062
 
Names Keerthana, A.K.
Ashraf, P.M.
Date Issued 2019 (iso8601)
Abstract Carbon quantum dots are fluorescent nanoparticles with various unique properties such as environmental friendliness, high
conductivity, low toxicity and high stability. This study aimed to synthesize carbon nanodots (CDs) from chitosan and
apply them as a corrosion inhibitor in BIS 2062 carbon steel. CDs were synthesized from chitosan, and their morphological
characteristics studied using atomic force microscopy (AFM) and transmission electron micrograph (TEM). The AFM and
TEM results showed that the CD had a spherical shape and 2D structure. The FTIR spectroscopy results indicated that the
CDs were rich in C=O and C–O functional groups. The UV–Vis spectroscopic analysis showed absorption peaks at 288 and
222 nm. Moreover, the zeta potential was positive. The BIS 2062 carbon steel, which is used for boat building, was coated
with CDs, and its electrochemical characteristics were studied through linear sweep voltammetry (LSV) and electrochemical
impedance spectroscopy (EIS). The LSV and EIS results showed that steel coupons coated with 0.05% CD had excellent
corrosion resistance. Cyclic voltammetric evaluation using glassy carbon electrode revealed that the oxidation and reduction
potential of iron oxide were significantly suppressed due to the coating of CDs. The results highlighted the use of CDs as a
corrosion inhibitor and a potential alternative to graphene-based materials
Genre Article
Identifier Applied Nanoscience, https://doi.org/10.1007/s13204-019-01177-0