Electrodeposition and Corrosion Behavior of Lanthanum Coatings on Tinplate in Chloride Medium
| Authors | Farida Boucetta1,2, Mohammed-Amin Boumehraz3, Saaid Naouel2 |
| Affiliations |
1Physics Laboratory of Thin Layers and Applications, University Mohamed Khider Biskra, 07000, Algeria 2Department of Chemistry, Faculty of Exact Sciences and Computer Science, University of Mohammed Seddik Benyahia, 18000 Jijel, Algeria 3Laboratory of Research in Civil Engineering, Mohammed Khider University of Biskra, 07000, Algeria |
| Е-mail | farida.boucetta@univ-jijel.dz |
| Issue | Volume 18, Year 2026, Number 4 |
| Dates | Received 05 April 2026; revised manuscript received 19 August 2026; published online 21 August 2026 |
| Citation | Farida Boucetta, Mohammed-Amin Boumehraz, Saaid Naouel, J. Nano- Electron. Phys. 18 No 4, 04006 (2026) |
| DOI | https://doi.org/10.21272/jnep.18(4).04006 |
| PACS Number(s) | 81.15.Pq, 81.65.Kn, 81.05.Rm, 82.45.Bb |
| Keywords | Electrodeposition (6) , Lanthanum-based coatings, Tinplate, Corrosion (2) , Polarization resistance. |
| Annotation |
This study investigates the electrodeposition of lanthanum-based coatings on tinplate and the effect of additives (H3BO3, H2O2, and NH4Cl) on their morphology and corrosion resistance in a 3.5 wt. % NaCl solution. The coatings were characterized by optical microscopy and potentiodynamic polarization measurements. The results show that the nature of the additive significantly influences the microstructure of the deposits. H3BO3 leads to relatively uniform and well-defined coatings, H2O2 promotes more compact structures, while NH4Cl results in heterogeneous and rough morphologies. Electrochemical measurements indicate a positive shift in corrosion potential and a significant decrease in corrosion current density after lanthanum deposition. The polarization resistance increases markedly, confirming the improved protective behavior of the coatings. A maximum protection efficiency of 96.45 % was obtained for the lanthanum-coated tinplate. The enhanced corrosion resistance is attributed to the formation of a protective layer acting as a barrier against electrolyte penetration, reducing oxygen diffusion and blocking active corrosion sites. These findings demonstrate that additives play a key role in controlling the deposition process and optimizing the protective performance of lanthanum-based coatings. |
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