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Oil&Gas

The Role of Tungsten on the Phase Transformation Kinetics and its Correlation with the Localized Corrosion Resistance of 25Cr Super Duplex Stainless Steels

May 29, 2020 by Mariano Iannuzzi

This investigation demonstrated 2.1 wt% tungsten drastically reduced the kinetics of tertiary phase precipitation in 25Cr super duplex stainless steels. The slow kinetics resulted in a better overall pitting corrosion resistance.

Filed Under: Corrosion Resistant Alloys, Critical potentials, Journal Articles, Library, Localized corrosion, Oil & Gas, Physical Metallurgy, Stainless steels, Temperature, Uncategorized Tagged With: chi phase, Oil&Gas, pitting corrosion, sigma phase, super duplex stainless 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

Fastener production

March 10, 2017 by Mariano Iannuzzi

This post illustrates a state-of-the-art fastener production line.

Filed Under: Fasteners Tagged With: fasteners, Oil&Gas, videos

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

Use of the critical acidification model to estimate critical localized corrosion potentials of duplex stainless steels – Publication

February 12, 2017 by Mariano Iannuzzi

Can we use Galvele’s critical acidification model to estimate the localized corrosion resistance of engineering stainless steels?
Short answer: yes; long answer: it is complicated.
Find out more in our recent CORROSION Journal article.

Filed Under: Critical potentials, Journal Articles, Oil & Gas, Stainless steels Tagged With: crevice corrosion, critical acidification model, duplex stainless steels, galvele, localized corrosion, Oil&Gas, pit-like, sdss, seawater, super duplex stainless steels

Effect of Tungsten on the Pitting and Crevice Corrosion Resistance of Type 25Cr Super Duplex Stainless Steels – Publication

February 11, 2017 by Mariano Iannuzzi

Are all super duplex stainless steels alike? Does tungsten additions have an influence on localized corrosion resistance?
Spoiler: it does, and it is remarkable.

Filed Under: Critical potentials, Journal Articles, Library, Localized corrosion, Stainless steels, Temperature Tagged With: cct, CPT, crevice corrosion, critical pitting temperature, duplex stainless steels, long-term exposure, Oil&Gas, pitting corrosion, seawater, tungsten

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