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UM ESTUDO TERMODINÂMICO DA CORROSÃO DOS AÇOS CARBONO PELO SULFETO DE HIDROGÊNIO – EXPLORANDO CONCEITOS DE EQUILÍBRIO QUÍMICO

2018; Brazilian Chemical Society; Linguagem: Inglês

10.21577/0100-4042.20170186

1678-7064

Mariana Cristina de Oliveira, Alexandre Oliveira Lima, Rodrigo Monzon Figueredo, Heloísa Andréa Acciari, Eduardo Norberto Codaro,

Geography and Environmental Studies

EQUILIBRIUM CONCEPTS.This study addresses an inherent problem to the oil and natural gas exploration and production industry, the corrosion of pipes and tanks by H 2 S. H 2 S with water emulsified in the oil or H 2 S with the water vapor mixed in the gas, they make the acid environment leading to corrosion.This is commonly manifested by the formation of insoluble sulfides on the surface of the carbon steels destined for this purpose.The evolution of the corrosion process depends on the composition and physicochemical characteristics of sulfide film.In this context, we intend to interpret the conditions of formation and precipitation of iron sulfides as a function of pH, using concepts of chemical equilibrium, electrode potential and electrochemical cell that are part of the subjects of chemistry.