Avaliação da susceptibilidade à corrosão do aço 1045 em diferentes tipos de ambientes externos

Abstract

Steel corrosion is a problem that affects several economic sectors, generating high costs for companies. This deterioration of steel often makes structures unsuitable for the purposes for which they were intended. Thus, losses arising from steel corrosion include production losses, operational stoppages, breakdown and disposal of machines and equipment, in addition to more serious failures, which are the loss of life resulting from accidents due to failure of metallic materials. In view of this, this research aims to carry out an analysis of the susceptibility to corrosion in 1045 steel, simulating the environments most prone to corrosion. To carry out this study, a methodology divided into two stages was used, in which the first was its theoretical foundation, based on bibliographical research, while the next stage consisted of experimental activities with samples of 1045 steel, which were subjected to environments simulated corrosives, to then be visually analyzed. Considering four corrosive environments, atmospheric air, salt, fresh water and salt water, the results showed that salt water was the most aggressive environment for the samples, resulting in a rough texture with a dark oxidation color. From this it was possible to conclude that all stages of the experiment were important for the accuracy of the results, allowing the 1045 steel to be analyzed in relation to the effects caused by its corrosion in the four proposed environments.