Products tagged with 'm13cr'

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Effect of H2S Concentration on the Passivation Behavior of Modified 13 Cr Martensitic Stainless Steels

Product Number: 51324-21009-SG

Author: Alan Martinez; Deeparekha Narayanan; Raymundo Case; Homero Castaneda; Ahmed Baghat

Publication Date: 2024

$40.00

Modified 13 Cr Martensitic Stainless steels (UNS S41426) are used extensively in the oil and gas industry as wellbore components in sweet and moderately sour service applications. The synergistic effects between H2S activity and temperature have a detrimental effect on the passive film stability. Electrochemical tests were performed using a 1L autoclave holding 35 bar of CO2 gas and varying H2S activity at 25°C and 150°C at a pH of 3.5. The pitting susceptibility is enhanced in regions along Ti(C,N) inclusions and regions where defective sulfide films generate local galvanic cells around regions with limited protection along the steel surface further driving the pitting process. Both DC and AC electrochemical techniques were correlated with microstructural characterization to observe the extent of passivation on the surface. Some service limits under acidic conditions are proposed based on the electrochemical results.

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Understanding the False Positive of Modified Martensitic Steels in Sweet & Sour Service Conditions using a Point Defect Model Perspective

Product Number: 51323-18901-SG

Author: Alan Martinez, Raymundo Case, Yuan Ding, Homero Castaneda, Jolly Bhadra, Noora Al-Thani, Aboubakr Abdullah, Ahmed Bahgat, Abdraman Moussa, Noora Al-Qahtani, Muhsen El Haddad

Publication Date: 2023

$20.00

Modified 13Cr (UNS S41426) (M13Cr) are advantageous as components for wellbores in oil and gas upstream units due to their high strength capabilities and tremendous corrosion resistance in sweet environments with minimal H2S levels. However, previous studies speculate disparities between an overestimation in the application limits for the 110 ksi grade material. Previous experimental results associate this to microstructural differences from varying heat treatments. The proprietary procedures used to manufacture, emphasize a lack of quality control among suppliers.

Products tagged with 'm13cr'

Effect of H2S Concentration on the Passivation Behavior of Modified 13 Cr Martensitic Stainless Steels

Understanding the False Positive of Modified Martensitic Steels in Sweet & Sour Service Conditions using a Point Defect Model Perspective

Association for Materials Protection and Performance