Testing the Effectiveness of Mango (Mangifera indica) and Apple (Malus pumila) Peels as an Active Ingredient in a Corrosion Inhibitor Spray for Galvanized Iron Pipes

Proponent/s Name/s (Last Name, First Name, Middle Initial)

Sheikh Mahrufa C. Islam, University of Baguio Science High SchoolFollow
Tom Iric C. Donato, University of Baguio Science High SchoolFollow
Charlie Mark E. Bumanglag, University of Baguio Science High SchoolFollow
Nigel Red M. Lopez, University of Baguio Science High SchoolFollow
Cye Guiller S. Evangelista, University of Baguio Science High SchoolFollow
Thea P. Suaco, University of Baguio Science High SchoolFollow

Document Type

Paper Presentation

Research Advisor (Last Name, First Name, Middle Initial)

Suaco, Thea P.

Abstract/Executive Summary

Corrosion in galvanized iron pipes (GIPs) poses significant challenges to water distribution systems, leading to structural degradation and public health risks. This study developed and assessed the efficacy of Mangifera indica (mango) and Malus pumila (apple) peel extracts as active ingredients in a corrosion inhibitor spray for galvanized iron pipes, using maceration to prepare 70% concentration extracts and testing them on GIPs immersed in 3 M hydrochloric acid for eight days. Results showed the combined extract exhibited the highest inhibition efficiency (27.71%), lowest thickness loss (1.449 × 10⁻³ cm), and minimal discoloration, outperforming individual extracts (apple: 23.76%; mango: 10.87%) and the control group, though efficiencies were lower than prior studies due to experimental variations such as the use of higher concentration, an extended immersion period, and differences in metal substrate. The findings demonstrate the potential of these eco-friendly spray alternatives, particularly when combined, while highlighting the need for further optimization and long-term testing to enhance practical applications.

Keywords

corrosion; galvanized iron pipes; green corrosion inhibitor; Mangifera indica; Malus pumila