Proposed Comparative Investigation of the Anticorrosion Properties of Mangrove Bark and Leaf Extracts on Mild Steel in Sodium Chloride Medium

Corrosion of mild steel is a common problem in saline environments, as sodium chloride accelerates the corrosion process and reduces the service life of the metal. There is growing interest in developing environmentally friendly corrosion inhibitors from natural sources. Plant extracts contain organic compounds that can interact with metal surfaces and reduce corrosion. Mangrove plants are of particular interest because their bark and leaves contain tannins, phenolic compounds, and other phytochemicals that may act as corrosion inhibitors. This proposed study aims to investigate and compare the anticorrosion properties of mangrove bark and leaf extracts on mild steel in a sodium chloride medium. Separate extracts will be prepared from mangrove bark and leaves and tested at different concentrations. A sodium chloride solution without any extract will be used as the control. The corrosion behaviour will be evaluated mainly using the weight-loss method. Mass loss, corrosion rate, and inhibition efficiency will be determined and compared between the bark and leaf extracts. This study will provide preliminary information on the potential of mangrove bark and leaf extracts as naturally derived green corrosion inhibitors for mild steel in saline environments. Note : This is a proposed undergraduate research study. Experimental work has not yet been conducted.