Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Influence Of Cold Deformation On Hydrogen Embrittlement By Determining The Critical Hydrogen Concentration In High Strength Steel For Wire Applications

Picture for Influence Of Cold Deformation On Hydrogen Embrittlement By Determining The Critical Hydrogen Concentration In High Strength Steel For Wire Applications
Available for download

The threshold hydrogen content of a material regarding hydrogen embrittlement plays an increasingly important role in corrosion research. This value indicates the hydrogen content to which the material can be used without failure. However, when determining the threshold hydrogen content, different test methods, different analysis methods and different interpretations of the results come together. This paper is intended to provide a guideline for the determination of the critical hydrogen concentration of high strength steel wire samples.

Product Number: 51322-17639-SG
Author: M. Truschner, P. Gruber, J. Deutsch, J. Pengg, G. Mori, H. Köberl
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings
$0.00
$20.00
$20.00

The resistance of steel wires to hydrogen embrittlement is very difficult to define and is therefore rarely investigated in literature. In this work a C65 steel wire was tested in hot rolled condition and after cold working. Both material states were first cathodically charged in sodium chloride (NaCl) with addition of thiourea (CH4N2S) at different current densities to determine the hydrogen content of each charging condition. In the next step mechanical properties and susceptibility to hydrogen induced stress corrosion cracking (HISCC) were determined in Slow Strain Rate Tests (SSRT). To prevent hydrogen effusion during experiments, samples were additionally further charged during the SSRT. Critical hydrogen concentrations for initiation of HISCC of both material states have been determined, whereas the critical
hydrogen concentration is lower in the hot rolled state.

The resistance of steel wires to hydrogen embrittlement is very difficult to define and is therefore rarely investigated in literature. In this work a C65 steel wire was tested in hot rolled condition and after cold working. Both material states were first cathodically charged in sodium chloride (NaCl) with addition of thiourea (CH4N2S) at different current densities to determine the hydrogen content of each charging condition. In the next step mechanical properties and susceptibility to hydrogen induced stress corrosion cracking (HISCC) were determined in Slow Strain Rate Tests (SSRT). To prevent hydrogen effusion during experiments, samples were additionally further charged during the SSRT. Critical hydrogen concentrations for initiation of HISCC of both material states have been determined, whereas the critical
hydrogen concentration is lower in the hot rolled state.

Product tags
Also Purchased
Picture for Improving Hydrogen Embrittlement Resistance Of Precipitation Hardened Nickel-Alloys
Available for download

Improving Hydrogen Embrittlement Resistance Of Precipitation Hardened Nickel-Alloys

Product Number: 51321-16673-SG
Author: Luca Foroni, Carlo Malara
Publication Date: 2021
$20.00

Precipitation hardened (PH) Ni-alloys are widely used in the oil and gas industry since they provide an excellent combination of corrosion resistance and mechanical strength. Their use in the manufacture of API1 6A pressure-containing and pressure-controlling components is subject to the stringent requirements of specification API Standard 6ACRA. However, matching the requirements of API Standard 6ACRA does not preclude susceptibility of some PH Ni-alloys to hydrogen embrittlement (HE) and this in some cases has led to premature and unexpected failures of components made from such
materials.(
Picture for Improving Integrity Management Decision Making Using Automated Calibration Of Model Predictions Using CP Survey Data
Available for download

Improving Integrity Management Decision Making Using Automated Calibration Of Model Predictions Using CP Survey Data

Product Number: 51322-17557-SG
Author: Robert Adey, Madhu Sudan Sapkota, John Baynham, Edward Apeh, Cristina Peratta
Publication Date: 2022
$20.00

In this paper, a case study is presented for a marine structure for which modelling has been used to predict the protection potentials over the life of the structure.

The aim of any digital transformation of integrity management and in particular corrosion control is the improvement of communication efficiency, planning efficiency and maintenance efficiency. Key issues are predictive maintenance and clarity of the information available so engineers can make informed decisions. Therefore it is not just a question of collecting more information but also the way that information is used and shared with the decision-makers.
Picture for Hydrogen Embrittlement of SS316L Instrument Tubing in a Hydroprocessing Unit
Available for download

Hydrogen Embrittlement of SS316L Instrument Tubing in a Hydroprocessing Unit

Product Number: 51320-14357-SG
Author: Siew Leong Waia, Rajaram Chidambaramb, John Richertc, Jorge Perdomo
Publication Date: 2020
$20.00

An unexpected failure of 316L Stainless Steel instrument tubing occurred in a high pressure Hydroprocessing unit resulting in a shutdown of the unit. The tubing system consisted of a compression type fitting commonly used in instrument systems and had only been in service for 3 years when the failure occurred. The failed tubing samples were removed for metallurgical analysis and determination of damage mechanism.   

Metallurgical analysis and finite element analysis of the tubing identified excessive cold working leading to hydrogen embrittlement as the primary mode of failure. This paper details the investigation into the failure to arrive at the root cause and the preventive measures adopted to assess the installed population of tubing in similar service.  

 
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