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Meeting Materials Science & Technology 2020
Symposium Advanced Coatings for Wear and Corrosion Protection
Presentation Title Electrochemical Corrosion Behaviors of Nitrogen-enriched Stainless Steels and High Chromium White Irons
Author(s) Virendra Singh, Manuel Marya
On-Site Speaker (Planned) Virendra Singh
Abstract Scope Stainless steels are economic choices of oilfield production equipment for sweet and mild sour environments, even though lacking hardness, abrasive wear properties, and galling resistance. In this short investigation, surface diffusion treatments such as liquid nitrocarburizing and plasma nitriding are applied to different grades of high-chromium alloys, specifically 13Cr (UNS41000), S13Cr (UNS41425), 17-4PH (UNS17400), 316 (UNS31600), as well as ASTM A532 white irons. The alloy corrosion behaviors were successfully established in different environmental chloride-rich conditions. Tribological properties were investigated by microindentation, correlated to (1) microstructural evaluations by SEM, EDS, and XRD, and (2) corrosion properties established by cyclic polarization testing, salt-sprays, and a variety of immersion tests. It is found that the effect of surface modifications predominantly depends on the selected alloys, with consistent reduction in passivation for all alloys.


Electrochemical Corrosion Behaviors of Nitrogen-enriched Stainless Steels and High Chromium White Irons
High-performance Boron-based Coatings Alloyed with Chrome to Protect Against Wear and Corrosion
High Performance Amorphous Based Thermal Sprayed Coatings for Molten Salt Environment
Improved Coating Performance of REACH Compliant Trivalent Chromium Plating Process for Functional Applications
Production of Chromium-aluminized Coatings to Protect Against Wear and Corrosion
The Surface Integrity of Hard Coatings and Surface Treatments on Alloy 17-4PH in Highly Soured Environments

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