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Experimental Study of Poly(1‐Acetamide‐3‐vinylimidazolium Bromide) as a Corrosion Inhibitor for N80 Carbon Steel in HCl
Author(s) -
Kong Minjian,
Meng Yan,
Fan Lei,
Yin Chengxian,
Chen Qibin,
Liu Honglai
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202100878
Subject(s) - dielectric spectroscopy , materials science , x ray photoelectron spectroscopy , corrosion inhibitor , monomer , adsorption , langmuir adsorption model , corrosion , hydrochloric acid , carbon steel , scanning electron microscope , dissolution , bromide , electrochemistry , nuclear chemistry , inorganic chemistry , chemical engineering , chemistry , metallurgy , composite material , organic chemistry , polymer , electrode , engineering
A poly(ionic liquid) (PIL), poly(1‐acetamide‐3‐vinylimidazolium bromide) (PCVIB), was investigated as a potential hydrochloric acid corrosion inhibitor for N80 carbon steel (N80‐CS) at 25 °C. In this work, the corrosion inhibition properties of PCVIB were monitored using weight loss, potential dynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM) and X‐ray photoelectron spectroscopy (XPS). Results show that the maximum inhibition efficiency (IE, η ) of PCVIB can reach up to 95.8 %, whereas its monomer only exhibits a low IE of η= 33.6 % under the same conditions. Moreover, PCVIB is characteristic of a mixed type inhibitor, which can effectively impede both cathodic hydrogen evolutions and metal dissolution reactions. Additionally, the adsorption of PCVIB on steel surfaces obeys the Langmuir adsorption isotherm. This finding implies that the polymerization can be a viable and facile method to create the high‐efficiency inhibitor from monomeric units that were found or used with the poor IE previously.