AMPP Store - Products tagged with 'ssrt'

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51318-10849-Effect of iron sulphide formation on hydrogen embrittlement of an API 5L X80 steel in H2S solutions

Product Number: 51318-10849-SG

Author: Mariana Costa Folena / José Antônio da Cunha Ponciano Gomes

Publication Date: 2018

$20.00

This study investigates the behaviour of the API X80 steel in relation to hydrogen absorption in solutions with different concentrations of H2S, at static and tensile test conditions.

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51318-10873-Influence of temperature and pH on SCC assisted by H2S susceptibility of 22%Cr duplex

Product Number: 51318-10873-SG

Author: Fiona Ruel / Saghi Saedlou / Christophe Mendibide

Publication Date: 2018

$20.00

The susceptibility of Stress Corrosion Cracking (SCC) assisted by H2S according temperature and pH. In a second phase, links are highlighted between the differences of cracking resistance and localized corrosion morphologies.

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51318-11478-High Strength N07718 with Improved Resistance to Cracking in H2S-Containing Environments

Product Number: 51318-11478-SG

Author: Sabine Kremel / Martin Wöls / Greg Chitwood / Luciana Intiso

Publication Date: 2018

$20.00

This paper describes the development of an alternative heat treatment designed to increase the strength of 718 (UNS N07718) above the current level, which is bound by the 40 HRC limit of NACE MR01751 and the heat treatment requirements of API 6ACRA.

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Determination of the Acceptability Conditions for a Safe Use of Alloys UNS S32750 Through SSRT Screening

Product Number: 51321-16322-SG

Author: Vincent Duquesnes/Christophe Mendibide/Wenle He/Raveendra Siriki

Publication Date: 2021

$20.00

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Effect of Chloride on the SCC Behavior of Carbon Steel Welds Exposed to Concrete Pore Water under Anoxic Conditions

Product Number: 51323-19029-SG

Author: B. Kursten, R. Gaggiano

Publication Date: 2023

$20.00

In all nuclear power generating countries, high-activity, long-lived radioactive waste is an unavoidable by-product of the contribution of this energy to the global electricity generation. Disposal in deep, stable geological formations is, at present, the most promising option accepted at an international level for the long-term management of these wastes. Geological disposal relies on a combination of engineered (man-made) barriers and a natural barrier (the host rock), in order to prevent radionuclides and other contaminants ever reaching concentrations outside the container at which they could present an unacceptable risk for people and the environment.

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Effect of Pre-pits on Localized Corrosion and Sulfide Stress Cracking Resistance of Duplex Stainless Steel UNS S32205 in Upstream Production Environments

Product Number: 51324-21031-SG

Author: Guru Prasad Sundararajan; V.T. Aruna; Marc E. Wilms; Navashree Surendran

Publication Date: 2024

$40.00

Components in upstream Oil and Gas production such as flowlines, storage vessels or injector pipelines which are made of duplex stainless steel UNS S32205 can undergo localized corrosion such as pitting or crevice corrosion when exposed to oxygen during shutdowns or turn arounds. Such unintended exposure to oxygen is related to poor maintenance or improper preservation and would normally require replacement of equipment. Further use of such pitted components can be considered but requires re-assessment of the pre-corroded material. Open-circuit Potential (OCP) and repassivation potentials (Erp) were measured on UNS S32205 in simulated flowline brines containing 150,000 mg/L Cl- at 110oC with pCO2 of 4.1 bara. The effect of pre-pits on bare and girth welded UNS S32205 was determined by creating artificial pits at OCP under oxygenated brine conditions and then switching the gaseous environment to sweet (CO2) conditions with continuous OCP monitoring. It was found that in oxygen-free CO2 production environments, existing pits did not grow. Sulfide Stress Cracking (SSC) resistance of pre-pitted solution annealed UNS S32205 specimens was determined through Slow Strain Rate Testing (SSRT) and Ripple Load Testing (RLT) at 90oC in concentrated chloride solutions. An electrochemical method was applied to create a single pit on the gauge surface. Comparison of SSRT and RLT results showed that SSRT is too aggressive for determining the pH2S limits. RLT of both pristine and pre-pitted UNS S32205 in concentrated chlorides with up to 0.3 bara pH2S did not show rupture, while selective attack of the ferrite phase was found (pit-depth < 30µm). RLT of notched UNS S32205 specimens were compared to that of pre-pitted specimens. Implications of these results on the limits recommended in ISO15156 / NACE MR0175 are discussed.

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Effect of the Austenite Spacing in Duplex Stainless Steel on the Sour Cracking Resistance

Product Number: 51324-20655-SG

Author: Christophe Mendibide; Matthieu Regniere

Publication Date: 2024

$40.00

This paper presents the results of a study aiming at evaluating the effect of austenite spacing on the sour cracking resistance of a duplex stainless steel. The stress corrosion cracking resistance was assessed using slow strain rate (SSRT) and constant load tests. Under SSRT, a clear effect of the austenite spacing is observed. Above a threshold spacing, the pH-pH2S acceptability domains are smaller as the austenite spacing increases. This effect is however not seen under constant load at 90% of the actual yield strength, suggesting that a dynamic straining or a large plastic strain is needed to highlight the effect of this parameter.

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Evaluation of Susceptibility of 316L to Stress Corrosion Cracking in Aqueous Ammonium Chloride Environments with Low Dissolved Oxygen

Product Number: 51324-20875-SG

Author: Jonas Sa; Alexander Saul; Monir Aljaradli; Dana Abdeen; Nicholas Laycock

Publication Date: 2024

$40.00

Corrosion of stainless steel in applied industrial environments continues to be an area of concern for various refining operators. It is well accepted that a certain concentration of dissolved oxygen is required for chloride stress corrosion cracking (SCC). However, there are some environments where it is suspected that chloride SCC can occur even in the absence of dissolved oxygen. The susceptibility to SCC of 316L stainless steel has been studied in the pursuit of extending operating boundaries at higher temperatures under low dissolved oxygen concentrations. Slow strain rate tensile (SSRT) tests have been carried out for various temperatures and ammonium chloride concentrations under low dissolved oxygen conditions. The susceptibility to SCC was assessed in terms of the relative reduction in area (RRA). Detailed fractography and cross section inspections were used to identify the damage mechanisms. The implications of this behavior and its influence on improving material selection have been discussed.

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Fast screening of Sulfide Stress Corrosion resistance of Supermartensitic Stainless Steel thought alternative test methods

Product Number: 51320-14577-SG

Author: Martien Duvall, Cécile Millet, Daniela Garcia, Guilaume Neel, Harold Evin

Publication Date: 2020

$20.00

In order to meet growing energy demand, oil and gas industries are facing many challenges, including the exploitation of increasingly deep fields with high pressure and high temperature in sour environments containing CO2 and H2S. Operators must carefully select materials that are resistant to these aggressive environments. The main risk associated with the use of martensitic stainless steels is the risk of sulfide stress cracking under well shut-in conditions.
The aim of this study is to evaluate the performance of supermartensitic stainless steels (13Cr-5Ni- 2Mo) based on NACE TM-0177-2016 method A and alternative methods such as slow strain rate test according to TM-0198-2016 and ripple strain rate test. Cyclic potentiodynamic polarization measurements were also performed to evaluate pitting and repassivation performance. The interest of this study is to present reliable and fast criteria to predict sulfide stress cracking performance of supermartensitic stainless steels through alternative methods. The effect of buffer and chloride content on pitting resistance and sulfide stress corrosion cracking resistance will also be discussed as well as the effect of Mo and Cr on pitting resistance.

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Hardness And Nickel-Based Alloys

Product Number: 51323-18806-SG

Author: Robert Badrak, Julia Botinha, John Groth, Helena Alves

Publication Date: 2023

$20.00

This paper addresses the relationship between hardness and environmental cracking resistance in nickel base alloys. The work here builds on the presentation made to AMPP’s SC08 Fall 2021 meeting on October 19th.