Corrosion monitoring of metal Mild steel Aluminium 1M HCl interface in the presence of Spathodea campanulata Tecoma capensis leaf and flower extracts Chemical Electrochemical and Theoretical studies

Abstract

The tremendous advancement in material science has led to increasing utilisation of metals and alloys in all facets of technology Metals possess many unique fundamental newlineproperties such as lustre strength hardness etc that when exploited makes them an ideal material for use in a diverse range of industrial applications The advent of modern civilization along with advancement of scientific technology has created an impetus in newlinedesigning newer materials for novel applications Mild steel and Aluminium alloys are noted to have multifarious applications in newlinevarious industries due to their low cost and easy availability In the history of the use of metals the past 150 years have been closely associated with alloys of metals such as Iron Aluminium and Copper Our highly developed civilization could not exist without them Yet corrosion is their Achilles heel Ferrous and nonferrous metals differ in the pace at which they tend to corrode in a natural environment Unprotected ferrous metals are exceedingly vulnerable to corrosion commonly referred to as rust a continuous process that occurs instantaneously under the newlineright conditions Non ferrous metals like aluminium zinc copper and brass are found to corrode at a lesser speed than ferrous metals This is due to the rapid formation of a thin protective oxide layer on their surface though they are susceptible to corrosion when newlineexposed to atmospheric conditions Aluminium alloys are highly favoured because of their non toxic corrosion product stability low density high thermal and electrical conductivity Fink 1936 newline