The electrochemical and mechanical behavior of phosphated and industrially drawn high-carbon pearlitic steel wire

Simple item page
dc.contributor.authorMEYSSOUNE Meriem
dc.contributor.authorMOSBAH Zidani (Directeur de Thèse)
dc.contributor.authorBOUTEFNOUCHET Hafida (Co-Directeur de Thèse)
dc.date.accessioned2026-02-22T10:08:05Z
dc.date.available2026-02-22T10:08:05Z
dc.date.issued2026-01-06
dc.description.abstractThis research investigates the electrochemical and mechanical behavior of phosphated and industrially drawn high-carbon pearlitic steel wire produced by the national company Trefisoud El Eulma, focusing on how progressive drawing deformation influences the steel’s structural, mechanical, and electrochemical characteristics as well as the performance of the coated surface at strain levels ε = 0, 0.68, 1.01, and 2.05. A combination of SEM and EBSD analyses revealed continuous pearlite refinement, reduction in interlamellar spacing, and development of a <110> fiber texture, while XRD quantification of dislocations confirmed a significant increase in defect density with deformation. Microhardness, nanoindentation, and wear tests indicated progressive strengthening and enhanced tribological properties, whereas electrochemical analyses (EIS and polarization) performed in simulated concrete pore solutions containing chlorides and sulfates demonstrated that deformation affects passivity, with sulfate ions stabilizing the passive film and chloride ions promoting localized attack. The zinc phosphate coating, characterized by XRD, SEM, scratch adhesion, and electrochemical testing, initially provided effective protection but exhibited decreasing adhesion and corrosion resistance with higher strain levels. Overall, the results establish a direct link between deformation, dislocation density, interlamellar spacing, and coating performance, offering valuable guidance for optimizing wire drawing and surface treatment processes to improve the durability of high-strength steels used in prestressed concrete applications.
dc.identifier.urihttp://dspace.ensti-annaba.dz:4000//handle/123456789/1083
dc.language.isoen
dc.publisherNational Higher School of Technology and Engineering. Annaba
dc.subjectHigh-carbon steel
dc.subjectPearlitic structure
dc.subjectInterlamellar spacing
dc.subjectPrestressed steel
dc.subjectWire drawing
dc.subjectEBSD
dc.subjectDislocation density
dc.subjectCrystallographic texture
dc.subjectMechanical strength
dc.subjectCorrosion behavior
dc.subjectPassive film
dc.subjectElectrochemical impedance spectroscopy (EIS)
dc.subjectZinc phosphate coating
dc.subjectAcier à haute teneur en carbone
dc.subjectStructure perlitique
dc.subjectEspacement interlamellaire
dc.subjectAcier précontraint
dc.subjectTréfilageEBSD
dc.subjectDensité de dislocations
dc.subjectTexture cristallographique
dc.subjectRésistance mécanique
dc.subjectComportement à l’usure
dc.subjectComportement à la corrosion
dc.subjectFilm passif
dc.subjectEssais électrochimiques
dc.subjectSpectroscopie d’impédance électrochimique (EIS)
dc.subjectRevêtement au phosphate de zinc
dc.titleThe electrochemical and mechanical behavior of phosphated and industrially drawn high-carbon pearlitic steel wire
dc.typeThesis
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
MERIEM Meyssoune _GMMM_Doctorat_2026 .pdf
Size:
6.99 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed to upon submission
Description:
Download
Collections
• Thèses Doctorat_Département Génie Minier, Métallurgie et Matériaux (G3M)