Products tagged with 'hydrogen sulphide'

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51318-10494- The Water pH and Gas Evolution Risks Associated with the Use of Aluminium and Zinc Anodes for the Internal Cathodic Protection of Offshore Monopiles

Product Number: 51318-10494-SG

Author: Alex Delwiche / Patrick Lydon

Publication Date: 2018

$20.00

Within a few weeks in a 2012 cathodic protection (CP) trial for monopiled windturbine structures in the North Sea, the seawater pH inside the monopile dropped from 8 to 5 and toxic gas (H2S and CO) alarms were energised. This paper explains why.

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Stress Corrosion Cracking of Austenitic Grade 347 and Duplex Grade 2205 Stainless Steels in Refinery Simulated Media Containing Hydrogen Sulfide and Chloride

Product Number: 51320-14406-SG

Author: K. Ravindranath, B. Al-Wakaa, R. Alazemi, N. Tanoli

Publication Date: 2020

$20.00

Stabilized austenitic stainless steel (SS) grade 347 is used extensively in high-temperature processes in the petroleum refining industry, while duplex SS (DSS) grade 2205 is a relatively newer material in the industry. Though these grades of SSs perform well in refinery process streams, there are incidents of failure of process equipment attributable to stress corrosion cracking (SCC). The paper deals with a study on the cracking susceptibility of SS grade 347 and DSS grade 2205 in refinery simulated process environments containing hydrogen sulfide and chloride. The paper also reports the electrochemical behavior of these SSs in the medium containing hydrogen sulfide and chloride. The electrochemical behavior of the alloys was assessed by cyclic polarization experiments. Slow strain rate test (SSRT) was used to evaluate the susceptibility of the alloys to SCC. The cyclic polarization studies indicate that the H2S – chloride synergism had a pronounced effect on the localized corrosion susceptibility of 347 SS, while the effect was marginal on the alloy DSS 2205. The SCC susceptibility of 347 SS and DSS 2205 is strongly influenced by hydrogen sulfide-chloride synergism. Initiation of corrosion pits and the sulfidation of active pits due to the synergism were the important steps in the initiation of SCC.

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The effect of reeling on the qualification of CRA lined and clad pipes according to NACE MR0175/ISO 15156-3: a methodology to qualify reeled pipelines

Product Number: 51323-18919-SG

Author: Riccardo Rizzo, Bjarte Lillebø, Stefan Marion, Erik Krogstad Sverre, Mads Arild Eidem, Karl Gunnar Solheim

Publication Date: 2023

$20.00

The use of carbon steel pipelines lined or clad with corrosion resistant alloys (CRAs) is increasing in the O&G industry. These pipelines combine the mechanical properties of carbon steel with the corrosion resistance of CRAs. Some CRAs such as AISI 316L (UNS 31603) are not pre-qualified according to ANSI/NACE MR0175/ISO 15156 part 3. The potential for corrosion and cracking of carbon steel in some applications can require a CRA liner/clad layer to resist corrosion but this can introduce the possible risk of stress corrosion cracking of some CRAs.

Products tagged with 'hydrogen sulphide'

51318-10494- The Water pH and Gas Evolution Risks Associated with the Use of Aluminium and Zinc Anodes for the Internal Cathodic Protection of Offshore Monopiles

Stress Corrosion Cracking of Austenitic Grade 347 and Duplex Grade 2205 Stainless Steels in Refinery Simulated Media Containing Hydrogen Sulfide and Chloride

The effect of reeling on the qualification of CRA lined and clad pipes according to NACE MR0175/ISO 15156-3: a methodology to qualify reeled pipelines

Association for Materials Protection and Performance