The electrochemical and mechanical behavior of phosphated and industrially drawn high-carbon pearlitic steel wire
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Date
2026-01-06
Journal Title
Journal ISSN
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Publisher
National Higher School of Technology and Engineering. Annaba
Abstract
This 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.
Description
Keywords
High-carbon steel, Pearlitic structure, Interlamellar spacing, Prestressed steel, Wire drawing, EBSD, Dislocation density, Crystallographic texture, Mechanical strength, Corrosion behavior, Passive film, Electrochemical impedance spectroscopy (EIS), Zinc phosphate coating, Acier à haute teneur en carbone, Structure perlitique, Espacement interlamellaire, Acier précontraint, TréfilageEBSD, Densité de dislocations, Texture cristallographique, Résistance mécanique, Comportement à l’usure, Comportement à la corrosion, Film passif, Essais électrochimiques, Spectroscopie d’impédance électrochimique (EIS), Revêtement au phosphate de zinc