The role of temperature and H2S (thiosulfate) on the corrosion products of API X65 carbon steel exposed to sweet environment

The Influence of Rotating Cage Geometry and Baffles on the Wall Shear Stress Equation in Sweet/Sour Corrosion

“…According to Wen and his collaborators 56 , carbon steels when in contact with an H 2 S containing environment and water, immediately form an adherent film on the anodic material surface, as well as found in previous works 57 . The various corrosion products forms tend to be mainly nonstoichiometric iron sulfide compounds.…”

“…On the internal samples surfaces, large regions were noticed (Figure 11) containing dark crystals similar to iron carbonate and chukanovite crystals presented in the literature 57,59,60 and found in DRX analyses (Figure 12D). These crystals preferentially formed where the iron sulfide film failed or presented pores and cracks.…”

Acid Corrosion Analysis in the Initial Condensation Zone of a H2O/CO2 Turbine

“…Relevant studies on the corrosion characteristics of steel in a CO 2 -H 2 O system are mainly in the field of oil and gas or CO 2 transport pipelines. These fields have already drawn a lot of researchers, scholars and engineers who have researched the mechanisms and the influencing factors of CO 2 corrosion, including temperature [7,8], CO 2 partial pressure [9][10][11], flow speed [12,13] and pH value [14,15]. Tanupabrungsun [16] proposed a mechanism for CO 2 corrosion, where the temperature ranged from 25 • C to 250 • C. It was suggested by de Waard et al [17] that the corrosion rate increased with temperature because of the acceleration of the kinetic rate of the electrochemical reactions under 80 • C. Guo et al [18] suggested that the corrosion rate did not change with temperatures in the range of 90-125 • C due to the formation of protective FeCO 3 .…”

AVALIAÇÃO DA INFLUÊNCIA DO TRATAMENTO TÉRMICO NA SUSCETIBILIDADE À CORROSÃO POR PITES EM AÇOS INOXIDÁVEIS SUPERMARTENSITICOS 13% Cr EM MEIOS CONTENDO CO2 E H2S

“…A interação CO2/H2S é um dos mecanismos corrosivos mais agressivos enfrentados atualmente. Souza et al(2019). Visto isso, foram desenvolvidos os aços denominados supermartensíticos (AISM) que combinam baixos teores de carbono intersticial, com adição de elementos de liga, como o níquel, molibdênio e, em alguns casos, nióbio, titânio entre outros, obtendo-se assim um comportamento mais nobre para esses aços em meios agressivos.…”

“…Já o H2S é resultado de contaminantes elementares como o enxofre, sulfatos e sulfetos presentes em altas concentrações no petróleo. Souza et al (2019).…”