Menu
Search
Filters
Close
Menu

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

Picture for Effect of iron sulphide formation on hydrogen embrittlement of an API 5L X80 steel in H2S solutions
Available for download

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.

Product Number: 51318-10849-SG
Author: Mariana Costa Folena / José Antônio da Cunha Ponciano Gomes
Publication Date: 2018
Industry: Gas/Liquid Pipelines
$0.00
$20.00
$20.00

With the growing application of high strength steel, as API 5L X80, for pipelines in the oil industry, and related geothermal energy generation plants, comes the concern about the risks involving hydrogen diffusion and hence, embrittlement due to severe operational conditions and corrosive environment containing hydrogen sulphide (H2S). Although many efforts have been made to predict and understand those phenomena, the mechanisms involving H2S corrosion combined with applied strain are still not entirely understood. In addition, the growth of iron sulphides scales can influence on the diffusion process. 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. It aims to evaluate hydrogen embrittlement susceptibility of the steel by means of hydrogen permeation and slow strain rate tests. Furthermore, the present work seeks out to evaluate, particularly in this embrittlement process, the conditions of iron sulphide layer forming and stability in different solutions of sodium thiosulphate, as well as the film influence as a protective barrier to hydrogen entry. Investigations using electrochemical impedance spectroscopy and surface analysis by SEM, EDS and XRD indicated that exists a relationship between different concentrations of H2S, scale formation and its barrier protectiveness to hydrogen generation and uptake.

Key words: Sour corrosion, iron sulphide, scale, hydrogen embrittlement, SSRT, electrochemistry

With the growing application of high strength steel, as API 5L X80, for pipelines in the oil industry, and related geothermal energy generation plants, comes the concern about the risks involving hydrogen diffusion and hence, embrittlement due to severe operational conditions and corrosive environment containing hydrogen sulphide (H2S). Although many efforts have been made to predict and understand those phenomena, the mechanisms involving H2S corrosion combined with applied strain are still not entirely understood. In addition, the growth of iron sulphides scales can influence on the diffusion process. 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. It aims to evaluate hydrogen embrittlement susceptibility of the steel by means of hydrogen permeation and slow strain rate tests. Furthermore, the present work seeks out to evaluate, particularly in this embrittlement process, the conditions of iron sulphide layer forming and stability in different solutions of sodium thiosulphate, as well as the film influence as a protective barrier to hydrogen entry. Investigations using electrochemical impedance spectroscopy and surface analysis by SEM, EDS and XRD indicated that exists a relationship between different concentrations of H2S, scale formation and its barrier protectiveness to hydrogen generation and uptake.

Key words: Sour corrosion, iron sulphide, scale, hydrogen embrittlement, SSRT, electrochemistry

Product tags
Also Purchased
Picture for BARE FIELD JOINT FOR SUSBEA PIPELINES A POSSIBLE ALTERNATIVE ?
Available for download

51318-10841-BARE FIELD JOINT FOR SUSBEA PIPELINES A POSSIBLE ALTERNATIVE ?

Product Number: 51318-10841-SG
Author: Gwenaëlle Benoit / Morgan Gouriou / Denis Melot / Jean Vittonato / Nicolas Larché
Publication Date: 2018
$20.00

An experiment to simulate bare field joint configuration under cathodic protection over a long term exposure in seawater on a 3LPE coated pipe section in renewed seawater and half-buried in mud. Results conclude that the bare field joint concept is feasible.
Picture for Evaluation of Top-of-Line Corrosion Model for Multiphase Oil and Gas Environments
Available for download

51318-11223-Evaluation of Top-of-Line Corrosion Model for Multiphase Oil and Gas Environments

Product Number: 51318-11223-SG
Author: H. Li / K. M. Yap / S. Srinivasan
Publication Date: 2018
$20.00

The model was evaluated and effects of various parameters on corrosion rates are described. Corrosion rates obtained from the model are compared with actual field and lab testing data as a basis to quantify accuracy and efficacy.
Picture for Comparison of critical pitting temperatures of stainless steel in different salt solutions
Available for download

51318-10846-Comparison of critical pitting temperatures of stainless steel in different salt solutions

Product Number: 51318-10846-SG
Author: Anna Delblanc / Kristina Lund / Anna Iversen
Publication Date: 2018
$20.00

This paper attempts to compare the critical pitting temperature (CPT) for alloys when ASTM G150 is not applicable. By using MgCl2 as electrolyte, the boiling point is increased and the measuring zone for CPT is broader.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support