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hydrogen

Hydrogen-Induced Stress Cracking of Swaged Super Duplex Stainless Steel Subsea Components

August 1, 2019 by Mariano Iannuzzi

HISC is the Achilles’ heel of duplex and super duplex stainless steels. In this investigation, we demonstrate the detrimental effects of both cold work (swaging) and anisotropic microstructures on HISC resistance. We believe the findings challenge the validity of the present form of DNV-GL RP F112 as a method to reduce HISC risks.

Filed Under: Environmentally Assisted Cracking, hisc, Hydrogen Embrittlement, Journal Articles, Physical Metallurgy Tagged With: hisc, hydrogen, hydrogen embrittlement, stainless steels, super duplex stainless steels

Effect of nickel on hydrogen permeation in ferritic/pearlitic low alloy steels – Publication.

April 26, 2018 by Mariano Iannuzzi

This is the first of a series of articles on the effect of nickel on the hydrogen embrittlement resistance of low alloy steels. In this paper, we investigated how nickel in solid solution in the ferrite phase affected hydrogen permeation.

Filed Under: Hydrogen Embrittlement, Journal Articles, Physical Metallurgy, Sulfide Stress Cracking Tagged With: hydrogen, hydrogen embrittlement, iso 15156, low alloy steels, permeation

Materials and corrosion trends in offshore and subsea oil and gas production – Publication

August 8, 2017 by Mariano Iannuzzi

In this article, we discuss materials and corrosion research topics that could have a transformative effect on the business. In particular, we discuss how scientists and engineers could push the boundaries of existing technologies, learning from the experience gained by other industries such as the nuclear, aerospace, and defense sectors.

Filed Under: Hydrogen Embrittlement, Journal Articles, Nickel Alloys, Stainless steels, Stress corrosion cracking, Sulfide Stress Cracking Tagged With: corrosion resistant alloys, hydrogen, Hydrogen Stress Cracking, localized corrosion, materials selection, nanoindentation, oil & gas, sour service

Pre-exposure embrittlement and stress corrosion cracking of magnesium alloy AZ31B in chloride solutions – Publication

April 11, 2017 by Mariano Iannuzzi

In this manuscript, we investigate the influence of hydrogen on the environmentally assisted cracking of the high-strength magnesium alloy AZ31B.​

Filed Under: Environmentally Assisted Cracking, Hydrogen Embrittlement, Journal Articles, Magnesium alloys, Stress corrosion cracking Tagged With: az31b, hydrogen, hydrogen embrittlement, Hydrogen Stress Cracking, Magnesium alloys, publications, Stress Corrosion Cracking

Are cracks born from pits?

January 31, 2016 by Mariano Iannuzzi

This article describes the different forms of environmentally assisted cracking that can affect low alloy steels and corrosion resistant alloys in the oil & gas industry.

Filed Under: Low alloy steels, Stress corrosion cracking, Sulfide Stress Cracking Tagged With: corrosion resistant alloys, CRA, hydrogen, hydrogen embrittlement, Hydrogen Stress Cracking, las, low alloy steels, Oil&Gas, SCC, ssc, sulfide stress cracking

Pre-exposure embrittlement and stress corrosion cracking of magnesium alloys in chloride solutions — Presentation

November 8, 2015 by Mariano Iannuzzi

Do magnesium alloys suffer environmentally assisted cracking?
In this work, presented at CORROSION 2014, we investigated the hydrogen embrittlement and stress corrosion cracking of magnesium alloy AZ31B in chloride solutions.

Filed Under: Environmentally Assisted Cracking, Magnesium alloys, Presentations, Stress corrosion cracking Tagged With: az31b, hydrogen, hydrogen embrittlement, Magnesium alloys, NACE

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