Per: José Rômulo azeredo Gomes (Universidade estadual do norte fluminense darcy ribeiro (uenf)), Fabrício bagli siqueira (universidade cândido mendes (ucam)), lucas menezes de souza (universidade estadual do norte fluminense (uenf)), talwani nogueira mattos (universidade cândido mendes (ucam)), elaine cristina pereira (universidade estadual do norte fluminense darcy ribeiro (uenf))
Abstract:
Corrosion is broadly defined as the deterioration of materials, the result of spontaneous processes that occur between the material and the environment. The phenomenon of corrosion is a natural and inevitable challenge. Carbon steel is widely used due to its diverse applications, many of which are based on its excellent mechanical properties. This metal has high ductility (ability to deform), high tenacity, is machinable, weldable and has a low production cost, but has reduced corrosion resistance, making it necessary to use processes to delay the corrosive mechanism, such as the use of inhibitors. . Many of the inhibitors used are associated with high costs, environmental and human health risks, due to their toxic nature. Thus, the study of corrosion inhibitors from natural products is increasing, which are low cost and non-toxic. Natural products have stood out as promising sources of corrosion inhibitors, as they are formed through plant extracts or biodegradable materials, where many of these extracts contain compounds with antioxidant action. This present work aimed to investigate the inhibitory action of guava seeds on the corrosion of AISI/SAE 1020 carbon steel in a medium of HCl 1 mol L-1 at concentrations of 1 g L-¹ of seed powder. Mass loss tests were carried out using dried and crushed guava seeds (inhibitor) mixed in a solution containing a simulation of a corrosive environment (HCl hydrochloric acid). The specimens made of carbon steel were immersed in an HCl solution with and without the inhibitor for a period of 21 days at room temperature. The efficiency of guava seed was satisfactory as a green type inhibitor, reaching a maximum value of 59.11%.
