Effect of the water/oil ratio on the SSCC susceptibility of high strength OCTG carbon steel Conference Paper uri icon

abstract

  • © 1999 by NACE International. In this paper a correlation is established between the values of SSC threshold stress (KISSC) and hydrogen permeation fluxes obtained using an electrochemical technique. The susceptibility of a high-strength steel to sulfide stress cracking (SSC) in the presence of crude oil was studied utilizing different crude oil/NACE solution ratios, and saturating the test solutions with H2S according to the standard NACE TM-0177 method D. Results showed that oil confer protective properties against uniform corrosion, stress corrosion cracking and hydrogen permeation. The hydrogen permeation technique was found useful to estimate the susceptibility of a given OCTG steel to SSC in sour environments, but the correlation between hydrogen flux and KISsc is highly dependant on testing conditions.

author list (cited authors)

  • Rincón, H., Hernández, S., Salazar, J., Case, R., & Vera, J.

publication date

  • January 1999