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low alloy steels

Is it a pit or is it a crack?

January 16, 2019 by Mariano Iannuzzi

This article describes current industry practices to catalog features observed after sulfide stress cracking testing. The article also introduces a quantitative criterion to determine the maximum allowable defect size based on fracture mechanics principles.

Filed Under: Sulfide Stress Cracking Tagged With: low alloy steels, Oil&Gas, ssc, sulfide stress cracking

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

Is sulfide stress cracking an anodic or a cathodic process?

February 19, 2017 by Mariano Iannuzzi

Is sulfide stress cracking an anodic or a cathodic process? Does hydrogen play a role or is SSC controlled by anodic dissolution? Find out in this post!

Filed Under: Low alloy steels, Oil & Gas, Sulfide Stress Cracking Tagged With: environmental cracking, low alloy steels, Oil&Gas, SCC, ssc, sulfide stress cracking

Mechanisms of alternating current induced corrosion of carbon steel – Publication

August 21, 2016 by Mariano Iannuzzi

Does an alternating current or electromagnetic field accelerate corrosion of carbon and low alloy steels? Check our new peer-reviewed article to find out!

Filed Under: AC Corrosion, Journal Articles, Low alloy steels, News Tagged With: ac corrosion, alterntating current, low alloy steels, Oil&Gas, seawater

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

High strength low alloy steels and hydrogen – Presentation

November 8, 2015 by Mariano Iannuzzi

How can we prevent cracking of high strength low alloy steels when exposed to hydrogen? Take a look at my presentation at the 2015 Robust Materialvalg i Oljeindustrien conference.

Filed Under: Presentations Tagged With: h2s, high strength, hydrogen, hydrogen embrittlement, las, low alloy steels

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