Synthesis and Characterization of Oligomer 4-Vinylpyridine as A Corrosion Inhibitor for Mild Steel in CO2 Saturated Brine Solution
ABSTRACT: In this work, the
oligomer of 4-vinylpyridine designated as O(4-VP) was synthesized by hydrogen
peroxide initiated chain growth polymerization and characterized in terms of
molecular weight and structure by matrix assisted laser desorption ionization
time of flight mass spectroscopy (MALDI-TOF MS). The oligomer was tested as
corrosion inhibitor of mild steel in brine solution saturated with carbon
dioxide, with the main purpose to investigate the effect of inhibitor
concentrations and temperatures on the inhibition activity defined in terms of
corrosion rate and percent of protection. The inhibition tests were carried out
using the methods of weight loss (WL) and linear polarization (LP). Characterization
using MALDI-TOF MS revealed that the oligomer has the mass (m/z) in the range
200-2400, which corresponds to chain length of 2-22 repeating units. The
results of corrosion rate measurements show that the corrosion rate with the
use of oligomer is significantly lower than that without inhibitor,
demonstrating that the oligomer functioned as effective corrosion inhibitor,
while the 4-vinyl pyridine monomer was found to promote the corrosion. It was
also found that the protection by the oligomer increased with increasing
temperature and it was predicted the oligomer was chemically adsorbed by the
surface of the metal.
Author: Ilim, Alan Jefferson,
Wasinton Simanjuntak, Marc Jeannin, Yana Maolana Syah, Bunbun Bundjali, and
Buchari
Journal Code: jpkimiagg160082
