A groundbreaking study has emerged from Covenant University and Bells University of Technology, exploring the potential of expired Glavox tablets as an innovative solution for corrosion inhibition in construction materials. This research, led by Loveth Omomeji, demonstrates that these expired pharmaceutical products, which contain Amoxicillin and Clavulanic acid, can significantly enhance the longevity of A36 carbon steel in corrosive environments, such as hydrochloric acid and saline solutions.
In the construction sector, where steel is a fundamental material, corrosion poses a significant challenge, leading to costly repairs and reduced structural integrity. Omomeji’s findings indicate a remarkable reduction in corrosion rates—dropping from 1.24 mm per year for untreated steel to just 0.17 mm per year when treated with a 7.5 ml solution of Glavox in hydrochloric acid. In saline conditions, the corrosion rate similarly decreased from 0.98 mm to 0.23 mm. This level of efficacy, reaching up to 86% inhibition efficiency, could translate into substantial savings and increased safety for construction projects.
“The results of our experiments suggest that expired Glavox tablets not only serve as effective corrosion inhibitors but also promote an environmentally friendly approach to waste management,” Omomeji stated. The dual benefit of utilizing expired drugs—reducing pharmaceutical waste while enhancing the durability of construction materials—could reshape practices in the industry.
The electrochemical assessments revealed significant changes in corrosion potential and current density, indicating the effectiveness of Glavox in altering the corrosion dynamics of steel. Furthermore, the study’s adsorption investigations confirmed the strong adherence of the inhibitor to the steel surface, which aligns with established adsorption models. The protective barrier formed on the steel surface, as shown by scanning electron microscopy and energy-dispersive X-ray spectroscopy, underscores the practical implications of this research.
As the construction industry increasingly seeks sustainable solutions, the potential application of expired pharmaceuticals like Glavox could lead to a new class of eco-friendly corrosion inhibitors. This not only addresses environmental concerns but also enhances the lifespan of critical infrastructure, ultimately improving safety and reducing maintenance costs.
This research is published in ‘Materials Research Express’, which translates to “Expresses Research on Materials” in English, highlighting its commitment to disseminating innovative scientific findings. As the construction sector continues to evolve, studies like this may pave the way for novel strategies that harmonize economic viability with environmental stewardship.
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