Influência dos elementos de liga nos aços inoxidáveis duplex e superduplex utilizados na indústria do petróleo: uma revisão

Abstract

As time goes by, the consumption of oil by humanity has been increasing progressively, this being one of the most used energy sources in the world today. For prospecting and subsequent refining and distribution of this mineral oil, large pipes and other components are used in the oil industry, generally made of metallic materials such as steel. Among the main steels used are stainless steels, which are alloys that have high corrosion resistance when compared to other metallic alloys, as well as appreciable mechanical strength, ease of forming, resistance to high temperatures and cryogenic temperatures. Among these stand out the duplex stainless steels (DSS) that have as competitors the ferritic and austenitic stainless steels. Starting from the analysis of data extracted from the metallurgical literature, it was possible to approach a comparison between these stainless steels, highlighting their main advantages and disadvantages, as well as taking into account the influence of the addition of alloy elements in these metallic alloys and observing the improvements brought about by the use of these materials in the chemical composition of such materials.