Performance of advanced composites as some corrosion protection coatings for 3D-printed H13 steel in 1M HCl: Elaboration, experimental and theoretical studies

R Hsissou and I Aichouch and A El Magri and KP Katin and E Berdimurodov and F Jalilov and F Benhiba and D Ouzebla, COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 726, 137848 (2025).

DOI: 10.1016/j.colsurfa.2025.137848

The present study highlights the evaluation of corrosion protection combating potential of two innovative composite coatings against 3D-printed H13 steel in 1 M HCl solution with investigation of experimental studies, and mathematical approaches (density functional theory (DFT), and molecular dynamics (MD) simulations). Two composite coatings were elaborated based N2,N4,N6-tris(2-(oxiran-2-yl methoxy) ethyl)-N2,N4,N6-tris(oxiran-2-yl methyl)-2.4.6-triamine-1,3,5-triazine (ERT) as an epoxy resin, diaminobiphenyl (DABP) as a curing agent, and titanium dioxide (TiO2) as a reinforcing filler. These composites were characterized through using different technique include XRD, FTIR, SEM, EDS, and AFM. The extreme protection efficiencies of 95.93 % (PDP), 95.44 % (EIS), and 93.84 % (WL) was recorded for ERT/DABP/TiO2 composite formulated by TiO2. The main findings of the incorporation of TiO2 in the elaborated composite is considered responsible for the best adherence protective coating formed on the 3D printed H13 steel surface. Electrochemical studies showed that the incorporation of TiO2 significantly reduced the corrosion current density from 2330.507 (bare steel) to 94.799 mu A/ cm2, and enhanced the polarization resistance from 22.57 S2 center dot cm2 to 495.4 S2 center dot cm2. SEM investigation was involved to outline the degradation of H13 steel surface when subjected to elaborated composites. EDS evaluated the possible presence of polymer coatings film over H13 steel surface. The mathematical models have been acclimated additionally as supporting evidence for experimental data. These findings confirm that the TiO2-enhanced elaborated composite provides an effective and durable corrosion barrier, with promising industrial applications.

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