Investigation of Corrosion Inhibition Efficiency of Plant Extracts on Mild Steel

CHAPTER ONE

1.1 Background to the Study

Corrosion is a major industrial problem that causes economic loss and equipment failure. Mild steel, commonly used in construction and manufacturing, is particularly prone to corrosion in acidic and marine environments (Fontana, 2005). The use of synthetic inhibitors can reduce corrosion, but most are toxic and non-biodegradable.

Recently, researchers have explored plant extracts as eco-friendly corrosion inhibitors. Many plants contain phytochemicals such as tannins, alkaloids, and flavonoids, which can adsorb onto metal surfaces and block corrosion sites (Singh et al., 2016). These compounds act as natural protective agents, reducing the rate of metal deterioration.

Plant-based inhibitors offer several advantages. They are inexpensive, renewable, and safe for the environment. Investigating their inhibition efficiency provides valuable insight into sustainable corrosion control. Such studies also support the global shift toward green chemistry and industrial sustainability.

1.2 Statement of the Problem

Synthetic corrosion inhibitors harm both the environment and human health. However, industries still rely heavily on them due to limited data on natural alternatives. This study examines the corrosion inhibition efficiency of selected plant extracts on mild steel.

1.3 Objectives of the Study

1. To prepare plant extract solutions for corrosion inhibition tests.

2. To evaluate their inhibition efficiency on mild steel in acidic medium.

3. To compare performance with standard synthetic inhibitors.

1.4 Significance of the Study

The findings will promote the development of safe and sustainable corrosion prevention methods. They will also provide scientific support for using plant-based compounds in industrial applications. Moreover, the research contributes to global environmental protection efforts.

1.5 Scope of the Study

The study will focus on mild steel samples immersed in acidic media. Selected plant extracts will be analyzed for their inhibition efficiency. Detailed surface morphology studies will not be covered.