Análise da influência do grau de encruamento em aço AISI 1020 no potencial de repouso e taxa de corrosão em ácido clorídrico 0,1 molar e ácido nítrico 0,1 molar

Abstract

This graduation thesis was developed in the laboratories of the Federal Technological University of Paraná, Ponta Grossa campus, and State University of Ponta Grossa, Uvaranas campus, this research is about experimental basis. The mechanic and metalurgic sector has as its risks and biggest economic problem the corrosion, which is mainly found on steel. From the making to turning it into parts, the steel goes through termic and mechanic processes that changes its microstructure who directly inffluences the steel's future safety, behaviour and trust. Relating this two situations commonly found in mechanics, the work proposed the study on 1020 AISI steel coldworked on traction test, with elongations of 0, 10, 15, 20 and 25% from its first size. These tests will be micrographically caracterized and through eletrochemical tests on acids analysed the inffluency of coldwork on the rest potencial and corrosiveness rate to this material. This research is willing to prevent the steel's behaviour in a certain tipe of facturing conditions and use, helping to control specific project of parts avoiding corrosion and extending the material's useful life estimation.