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)), Muryllo Almeida da Silva (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 browning 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 behavior of the inhibitory action of papaya seeds, more specifically by adding proportions of these seeds in the preparation of the mixture for making packaging of metal parts made of AISI/SAE 1020 carbon steel in a chloride medium. of Sodium (NaCl) 1 mol L-1 in concentrations of 1 g L-¹ of seed powder. Mass loss tests were carried out, using as methodology the use of dried and crushed papaya seeds (inhibitor) in the manufacture of packaging used to package corrosion coupons, simulating metal parts, in a solution containing a scenario corrosive environment Sodium Chloride (NaCl). Immersion tests were carried out with carbon steel corrosion coupons packaged and unpackaged in recyclable paper in acidic NaCl solution for periods of 7, 14 and 21 days. The efficiency of using papaya seeds in the manufacture of packaging for metal parts was satisfactory up to a certain point, however, as a green type inhibitor in a neutral NaCl medium, it did not have the expected result, reaching a value maximum of 0.00%.
