Titre :	Synthesis and study of the inhibition efficiency of 1,2,4-triazole-derived compounds on XC45 steel in a 1 M HCl medium
Type de document :	document électronique
Auteurs :	Sonia Gridi, Auteur ; Chaima Kemouche, Auteur ; Fatima Setifi, Directeur de thèse
Editeur :	Sétif:UFA1
Année de publication :	2025
Importance :	1 vol (133 f.)
Format :	29 cm
Langues :	Français (fre)
Catégories :	Chimie
Mots-clés :	Corrosion  XC45 Steel  Corrosion Inhibition  1M HCl  Electrochemical Methods  Trz-B and Trz-S
Index. décimale :	540 - Chimie et sciences connexes
Résumé :	This study investigates the corrosion inhibition of XC45 steel in a 1M HCl solution using two organic inhibitors: 2-([1,2,4] triazol-4-yliminomethyl)-phenol and benzylidene-[1,2,4]triazol-4-yl-amine. The research employs a combination of electrochemical techniques, including stationary methods (gravimetric analysis and polarization curves) and non-stationary methods (electrochemical impedance spectroscopy), to evaluate the inhibitors' effectiveness. The effects of inhibitor concentration and temperature on corrosion behavior were also examined. The results indicate that the presence of either inhibitor significantly enhances the corrosion resistance of XC45 steel in acidic media. This is demonstrated by a decrease in corrosion potential (Ecorr) and corrosion current density (icorr), along with an increase in both polarization resistance (Rp) and charge transfer resistance (Rct). The improved corrosion resistance is attributed to the rapid formation of a protective film on the steel surface, acting as a barrier against corrosive attack. Maximum inhibition efficiencies of 88.84% for benzylidene-[1,2,4]triazol-4-yl-amine (Trz-B) at 10⁻3M and 73.38% for 2-([1,2,4]triazol-4-yliminomethyl)-phenol (Trz-S) at 5×10⁻³ M were achieved. However, the efficiency declines with increasing temperature, suggesting a physisorption mechanism and indicating that both inhibitors act as mixed-type inhibitors.
Note de contenu :	Content ACKNOWLEDGEMEN .......................................................................................................... 2 List of figuers ............................................................................................................................ 4 List of tables ............................................................................................................................. .7 List of Abbreviations ............................................................................................................... .8 General Introduction ............................................................................................................. 17 CHAPTERⅠ: LITERATURE REVIEW ............................................................................. 19 I.1. GENERAL CONCEPT OF CORROSION: ........................................................................... 20 I.1.1. Definition of Corrosion: ......................................................................................... 20 I.1.2. Corrosion Process: ................................................................................................. 20 I.1.3. Types of corrosion: ................................................................................................. 21 I.1.3.a. Chemical corrosion (dry): .............................................................................. 22 I.1.3.b. Biological (bacterial) corrosion: .................................................................... 22 I.1.3.c. Corrosion by erosion: ..................................................................................... 23 I.1.3.d. Electrochemical corrosion (wet): .................................................................. 23 I.1.4. Forms of corrosion: ................................................................................................ 24 I.1.4.a. Uniform or generalized corrosion: ................................................................ 24 I.1.4.b. Localized corrosion: ....................................................................................... 24 I.1.4.c. Crevice or crevice corrosion: ......................................................................... 26 I.1.4.d. Intergranular Corrosion: ............................................................................... 26 I.1.4.e. Stress corrosion: .............................................................................................. 27 I.1.4.f. Selective Corrosion: ........................................................................................ 27 I.1.4.g. Hydrogen Embrittlement: .............................................................................. 27 I.1.5. Main factors responsible for corrosion: ................................................................ 28 I.1.6. Means of Protection against Corrosion: ............................................................... 29 I.1.7. Corrosion Protection: ............................................................................................. 33 I.1.7.A. Coating Protection: ........................................................................................... 32 I.1.7.B. Protection by inhibition: ................................................................................ 33 I.2. CORROSION INHIBITORS: ............................................................................................... 33 I.2.1 introduction on corrosion and protection: ............................................................. 33 I.2.2 history of corrosion inhibition: ............................................................................... 34 I.2.3 Definition of Corrosion Inhibitors: ........................................................................ 35 I.2.TERMS OF USE: ............................................................................................................... 35 I.2.5 Crucial Elements of Inhibitor Performance and Use: ........................................... 35 I.2.6 Typical Industrial Applications: ............................................................................. 36 I.2.7 Corrosion inhibitor classification: .......................................................................... 36 I.2.7.1 Classification by Nature of Products (composition): .................................... 37 I.2.7.2 Categorization based on Electrochemical Action Mechanism Corrosion: . 39 I.2.7.3 Categorization Using Interface Mechanisms and Action Principles: ......... 45 I.2.7.4 Application-Specific Categorization: ............................................................. 50 I.2.8 Concentration's Impact on the Inhibitory Effect: .................................................. 51 I.2.9 How Temperature Affects Corrosion Prevention: ................................................. 54 I.2.10Analysis of the bibliography: ................................................................................. 56 I.2.11. Physicochemical properties of triazoles ............................................................... 57 I.2.12. Reasons for selecting a ligand derived from 1,2,4-triazoles as a corrosion inhibitor: ........................................................................................................................... 58 CHAPTER II: EXPERIMENTAL CONDITIONS ......................................................................... 72 II.1. STUDY OF THE INHIBITION OF XC45 STEEL: ............................................................... 73 II.1.1. Material: ................................................................................................................ 73 Ⅱ.1.2. Materials Employed: ............................................................................................ 74 II.2. THE COMPOSITION AND SYNTHESIS OF THE COMPOUNDS UNDER STUDY: .................. 74 II.2.1. Synthesis assembly: ............................................................................................... 75 II.3. 1. Mode of Operation: .............................................................................................. 75 II.4.1. Thin layer chromatography (TLC): ..................................................................... 77
Côte titre :	MACH/0364

Synthesis and study of the inhibition efficiency of 1,2,4-triazole-derived compounds on XC45 steel in a 1 M HCl medium [document électronique] / Sonia Gridi, Auteur ; Chaima Kemouche, Auteur ; Fatima Setifi, Directeur de thèse . - [S.l.] : Sétif:UFA1, 2025 . - 1 vol (133 f.) ; 29 cm.
Langues : Français (fre)

Catégories :	Chimie
Mots-clés :	Corrosion  XC45 Steel  Corrosion Inhibition  1M HCl  Electrochemical Methods  Trz-B and Trz-S
Index. décimale :	540 - Chimie et sciences connexes
Résumé :	This study investigates the corrosion inhibition of XC45 steel in a 1M HCl solution using two organic inhibitors: 2-([1,2,4] triazol-4-yliminomethyl)-phenol and benzylidene-[1,2,4]triazol-4-yl-amine. The research employs a combination of electrochemical techniques, including stationary methods (gravimetric analysis and polarization curves) and non-stationary methods (electrochemical impedance spectroscopy), to evaluate the inhibitors' effectiveness. The effects of inhibitor concentration and temperature on corrosion behavior were also examined. The results indicate that the presence of either inhibitor significantly enhances the corrosion resistance of XC45 steel in acidic media. This is demonstrated by a decrease in corrosion potential (Ecorr) and corrosion current density (icorr), along with an increase in both polarization resistance (Rp) and charge transfer resistance (Rct). The improved corrosion resistance is attributed to the rapid formation of a protective film on the steel surface, acting as a barrier against corrosive attack. Maximum inhibition efficiencies of 88.84% for benzylidene-[1,2,4]triazol-4-yl-amine (Trz-B) at 10⁻3M and 73.38% for 2-([1,2,4]triazol-4-yliminomethyl)-phenol (Trz-S) at 5×10⁻³ M were achieved. However, the efficiency declines with increasing temperature, suggesting a physisorption mechanism and indicating that both inhibitors act as mixed-type inhibitors.
Note de contenu :	Content ACKNOWLEDGEMEN .......................................................................................................... 2 List of figuers ............................................................................................................................ 4 List of tables ............................................................................................................................. .7 List of Abbreviations ............................................................................................................... .8 General Introduction ............................................................................................................. 17 CHAPTERⅠ: LITERATURE REVIEW ............................................................................. 19 I.1. GENERAL CONCEPT OF CORROSION: ........................................................................... 20 I.1.1. Definition of Corrosion: ......................................................................................... 20 I.1.2. Corrosion Process: ................................................................................................. 20 I.1.3. Types of corrosion: ................................................................................................. 21 I.1.3.a. Chemical corrosion (dry): .............................................................................. 22 I.1.3.b. Biological (bacterial) corrosion: .................................................................... 22 I.1.3.c. Corrosion by erosion: ..................................................................................... 23 I.1.3.d. Electrochemical corrosion (wet): .................................................................. 23 I.1.4. Forms of corrosion: ................................................................................................ 24 I.1.4.a. Uniform or generalized corrosion: ................................................................ 24 I.1.4.b. Localized corrosion: ....................................................................................... 24 I.1.4.c. Crevice or crevice corrosion: ......................................................................... 26 I.1.4.d. Intergranular Corrosion: ............................................................................... 26 I.1.4.e. Stress corrosion: .............................................................................................. 27 I.1.4.f. Selective Corrosion: ........................................................................................ 27 I.1.4.g. Hydrogen Embrittlement: .............................................................................. 27 I.1.5. Main factors responsible for corrosion: ................................................................ 28 I.1.6. Means of Protection against Corrosion: ............................................................... 29 I.1.7. Corrosion Protection: ............................................................................................. 33 I.1.7.A. Coating Protection: ........................................................................................... 32 I.1.7.B. Protection by inhibition: ................................................................................ 33 I.2. CORROSION INHIBITORS: ............................................................................................... 33 I.2.1 introduction on corrosion and protection: ............................................................. 33 I.2.2 history of corrosion inhibition: ............................................................................... 34 I.2.3 Definition of Corrosion Inhibitors: ........................................................................ 35 I.2.TERMS OF USE: ............................................................................................................... 35 I.2.5 Crucial Elements of Inhibitor Performance and Use: ........................................... 35 I.2.6 Typical Industrial Applications: ............................................................................. 36 I.2.7 Corrosion inhibitor classification: .......................................................................... 36 I.2.7.1 Classification by Nature of Products (composition): .................................... 37 I.2.7.2 Categorization based on Electrochemical Action Mechanism Corrosion: . 39 I.2.7.3 Categorization Using Interface Mechanisms and Action Principles: ......... 45 I.2.7.4 Application-Specific Categorization: ............................................................. 50 I.2.8 Concentration's Impact on the Inhibitory Effect: .................................................. 51 I.2.9 How Temperature Affects Corrosion Prevention: ................................................. 54 I.2.10Analysis of the bibliography: ................................................................................. 56 I.2.11. Physicochemical properties of triazoles ............................................................... 57 I.2.12. Reasons for selecting a ligand derived from 1,2,4-triazoles as a corrosion inhibitor: ........................................................................................................................... 58 CHAPTER II: EXPERIMENTAL CONDITIONS ......................................................................... 72 II.1. STUDY OF THE INHIBITION OF XC45 STEEL: ............................................................... 73 II.1.1. Material: ................................................................................................................ 73 Ⅱ.1.2. Materials Employed: ............................................................................................ 74 II.2. THE COMPOSITION AND SYNTHESIS OF THE COMPOUNDS UNDER STUDY: .................. 74 II.2.1. Synthesis assembly: ............................................................................................... 75 II.3. 1. Mode of Operation: .............................................................................................. 75 II.4.1. Thin layer chromatography (TLC): ..................................................................... 77
Côte titre :	MACH/0364