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A theoretical and experimental study of phosphate ester inhibitors for AISI 1018 in carbon dioxide‐saturated 3.5 wt% NaCl solution
Author(s) -
Vasques Roberta Bastos,
Levy Marjory Moreira,
Rodrigues Matheus Souza,
Queiroz Almeida Neto Francisco Wagner,
Silva Leonardo Paes,
Vaz Gustavo Leitão,
Magalhães Álvaro Augusto Oliveira,
LimaNeto Pedro,
Araújo Walney Silva
Publication year - 2021
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.202112365
Subject(s) - autoclave , corrosion , carbon steel , carbon dioxide , materials science , polarization (electrochemistry) , electrochemistry , bubble , phosphate , langmuir , corrosion inhibitor , atmospheric pressure , inorganic chemistry , chemical engineering , nuclear chemistry , chemistry , metallurgy , organic chemistry , electrode , adsorption , oceanography , parallel computing , computer science , engineering , geology
Phosphate ester was investigated as a corrosion inhibitor for AISI 1018 carbon steel in carbon dioxide‐saturated chloride solutions at different temperatures and pressures. The corrosion tests were realized by electrochemical techniques, weight loss measurements, bubble tests, and a high‐pressure/high‐temperature autoclave system. The corrosion tests demonstrated that the investigated molecule is an excellent corrosion inhibitor. The inhibiting effect is even bigger at high pressure and temperature than at atmospheric pressure and room temperature. The thermodynamic parameters were calculated and determined to obey the Langmuir isotherm. Polarization studies revealed that the evaluated inhibitor is a mixed type.