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Maximum allowable service temperatures and the ASTM G48 test

November 29, 2013 by Mariano Iannuzzi

Can we use the ASTM G48 test to establish the maximum allowable temperature of a metal or alloy in an oxidizing environment like seawater?
This post discusses how the ferric chloride electrolyte of the ASTM G48 test compares with other oxidizing environments such as seawater.

Filed Under: ASTM, Fundamentals, Localized corrosion, Nickel Alloys, Stainless steels, Temperature Tagged With: ASTM G48, CPT, CRA, localized corrosion, materials selection, Oil&Gas, seawater

Guide to corrosion resistant nickel alloys

November 27, 2013 by Mariano Iannuzzi

Very interesting article by Haynes Int. on nickel alloys: LINK.

Filed Under: Corrosion Resistant Alloys, Nickel Alloys Tagged With: materials selection, nickel alloys

Hydrogen diffusion control during stress corrosion cracking of magnesium alloy AZ31B in chloride solutions – Abstract

November 26, 2013 by Mariano Iannuzzi

SCC of AZ31B alloy was studied in NaCl solutions at different potentials and chloride concentrations using the slow strain rate technique. A combination of pre-exposure tests followed by immediate straining or straining after a dry air exposure delay helped to weight the relative importance of anodic damage accumulation versus increased hydrogen charging during open-circuit potential pre-exposure. The dependence of ductility with pre-exposure time and the fracture surface of embrittled samples suggest that hydrogen embrittlement of AZ31B was controlled by hydrogen diffusion.

Filed Under: Abstracts, Environmentally Assisted Cracking, Magnesium alloys, Stress corrosion cracking Tagged With: CORROSION/14, EAC, HSC, Hydrogen Stress Cracking, Magnesium alloys, SCC, Stress Corrosion Cracking

The stress corrosion cracking bug

November 26, 2013 by Mariano Iannuzzi

An insightful and current 1935 comment on stress corrosion cracking of stainless steels by Dr. Horace W. Gillett.

Filed Under: Phrases, Stress corrosion cracking Tagged With: EAC, phrases, SCC, stainless steels, Stress Corrosion Cracking

Selecting corrosion resistant alloys for seawater applications

November 25, 2013 by Mariano Iannuzzi

This abstract has been submitted to the upcoming NACE International CORROSION/14 Research in Progress Session on Passivity and Localized Corrosion. By: Mariano Iannuzzi Coauthors: Mauricio Rincón-Ortiz (first author), Mariano Kappes, Martín A. Rodríguez, Ricardo Carranza, and Raúl Rebak. In the offshore oil and gas industry, materials selection philosophies are traditionally based on the International Standard Organization (ISO) 21457 […]

Filed Under: Abstracts, Conferences Tagged With: CORROSION/14, CRA, localized corrosion, materials selection, Oil&Gas, PREN, Subsea

Hello world!

January 17, 2013 by Mariano Iannuzzi

This is my first test post…. so, welcome everyone!

Filed Under: Miscellaneous, Wordpress Tagged With: miscellaneous

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