Inhibition behavior of imidazoline phosphate compound inhibitor on Q235 steel in hydrochloric acid medium

J. Zhang; X. L. Gong; H. H. Yu; M. Du

doi:10.5006/1.3573550

Inhibition behavior of imidazoline phosphate compound inhibitor on Q235 steel in hydrochloric acid medium

J. Zhang, X. L. Gong, H. H. Yu, M. Du

Ocean University of China

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

The inhibitive effect on Q235 steel and the adsorption behavior of a compound inhibitor, including imidazoline phosphate (IPI) and potassium iodide (KI), were studied in 1 mol/L hydrochloric acid (HCl) solution using the weight-loss method, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). Results showed that the inhibition efficiency increased with an increase in inhibitor concentration, and temperature had no significant effect on inhibition efficiency. The compound inhibitor was a mixed-type inhibitor that mainly inhibits cathodic processes. The best inhibition efficiency was obtained at an immersion time of 120 h. The adsorption of the compound inhibitor on Q235 steel could befitted to a Langmuir isotherm and the values of the adsorption free energy ΔG _ads are close to -40 kJ/mol over the studied temperature range. The adsorption process is a spontaneous chemical adsorption.

Original language	English
Pages (from-to)	450051-450057
Number of pages	7
Journal	Corrosion
Volume	67
Issue number	4
DOIs	https://doi.org/10.5006/1.3573550
State	Published - Apr 2011
Externally published	Yes

Keywords

Absorption
Acid inhibitors
Carbon steel
Corrosion
Hydrochloric acid
Polarization

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10.5006/1.3573550

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title = "Inhibition behavior of imidazoline phosphate compound inhibitor on Q235 steel in hydrochloric acid medium",

abstract = "The inhibitive effect on Q235 steel and the adsorption behavior of a compound inhibitor, including imidazoline phosphate (IPI) and potassium iodide (KI), were studied in 1 mol/L hydrochloric acid (HCl) solution using the weight-loss method, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). Results showed that the inhibition efficiency increased with an increase in inhibitor concentration, and temperature had no significant effect on inhibition efficiency. The compound inhibitor was a mixed-type inhibitor that mainly inhibits cathodic processes. The best inhibition efficiency was obtained at an immersion time of 120 h. The adsorption of the compound inhibitor on Q235 steel could befitted to a Langmuir isotherm and the values of the adsorption free energy ΔG ads are close to -40 kJ/mol over the studied temperature range. The adsorption process is a spontaneous chemical adsorption.",

keywords = "Absorption, Acid inhibitors, Carbon steel, Corrosion, Hydrochloric acid, Polarization",

author = "J. Zhang and Gong, \{X. L.\} and Yu, \{H. H.\} and M. Du",

year = "2011",

month = apr,

doi = "10.5006/1.3573550",

language = "英语",

volume = "67",

pages = "450051--450057",

journal = "Corrosion",

issn = "0010-9312",

publisher = "Association for Materials Protection and Performance",

number = "4",

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TY - JOUR

T1 - Inhibition behavior of imidazoline phosphate compound inhibitor on Q235 steel in hydrochloric acid medium

AU - Zhang, J.

AU - Gong, X. L.

AU - Yu, H. H.

AU - Du, M.

PY - 2011/4

Y1 - 2011/4

N2 - The inhibitive effect on Q235 steel and the adsorption behavior of a compound inhibitor, including imidazoline phosphate (IPI) and potassium iodide (KI), were studied in 1 mol/L hydrochloric acid (HCl) solution using the weight-loss method, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). Results showed that the inhibition efficiency increased with an increase in inhibitor concentration, and temperature had no significant effect on inhibition efficiency. The compound inhibitor was a mixed-type inhibitor that mainly inhibits cathodic processes. The best inhibition efficiency was obtained at an immersion time of 120 h. The adsorption of the compound inhibitor on Q235 steel could befitted to a Langmuir isotherm and the values of the adsorption free energy ΔG ads are close to -40 kJ/mol over the studied temperature range. The adsorption process is a spontaneous chemical adsorption.

AB - The inhibitive effect on Q235 steel and the adsorption behavior of a compound inhibitor, including imidazoline phosphate (IPI) and potassium iodide (KI), were studied in 1 mol/L hydrochloric acid (HCl) solution using the weight-loss method, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). Results showed that the inhibition efficiency increased with an increase in inhibitor concentration, and temperature had no significant effect on inhibition efficiency. The compound inhibitor was a mixed-type inhibitor that mainly inhibits cathodic processes. The best inhibition efficiency was obtained at an immersion time of 120 h. The adsorption of the compound inhibitor on Q235 steel could befitted to a Langmuir isotherm and the values of the adsorption free energy ΔG ads are close to -40 kJ/mol over the studied temperature range. The adsorption process is a spontaneous chemical adsorption.

KW - Absorption

KW - Acid inhibitors

KW - Carbon steel

KW - Corrosion

KW - Hydrochloric acid

KW - Polarization

UR - https://www.scopus.com/pages/publications/79955686872

U2 - 10.5006/1.3573550

DO - 10.5006/1.3573550

M3 - 文章

AN - SCOPUS:79955686872

SN - 0010-9312

VL - 67

SP - 450051

EP - 450057

JO - Corrosion

JF - Corrosion

IS - 4

ER -

Inhibition behavior of imidazoline phosphate compound inhibitor on Q235 steel in hydrochloric acid medium

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Keywords

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