• Doxsteel Fasteners Corrosion Specialist Leading the Way at OTC 2018 with Breakthrough Research on Hydrogen Embrittlement in Offshore Bolting

    HOUSTON, TX — Doxsteel Fasteners Senior Corrosion Specialist Dr. Omar Rosas has been invited to the 2018 Offshore Technology Conference to present “Reducing Hydrogen Embrittlement Risk of Steel Bolting in Seawater Environment with Nickel-Cobalt Electroplating,” discussing his findings on hydrogen embrittlement and how ASTM B994 Nickel-Cobalt electroplating is a barrier to hydrogen in marine environments.

    Among the several threats to bolting in marine environments, hydrogen embrittlement is one of the most dreaded. A form of environmentally assisted cracking (EAC), hydrogen embrittlement occurs when hydrogen penetrates a fastener’s base material, making it fragile and more susceptible to failure. Dr. Rosas addresses the severity of marine environments and how different metallic coatings influence the amount of hydrogen present in carbon steel bolting.

    Last year, Dr. Rosas co-presented the webinar “Barrier to Hydrogen Embrittlement in Fasteners” with Dr. Jim Burk, former Senior Materials Advisor at BP Worldwide. The webinar, based on Dr. Rosas’ research, presented an overview of ASTM B994’s capabilities targeted toward a general oil & gas audience. This paper will provide a more technical analysis of hydrogen embrittlement and the potential of ASTM B994 to protect fasteners from stress corrosion cracking.

    The metallic coatings evaluated in Dr. Rosas’ investigation are Zinc and Zinc-Nickel sacrificial coatings, and Nickel-Cobalt plating that complies with ASTM B994 specifications. Zinc and Zinc-Nickel are common coatings currently used in both critical and non-critical bolting in the oil & gas industry. Nickel-Cobalt ASTM B994 is a novel material with many offshore applications, including highly-critical subsea environments.

    The efforts of Dr. Rosas have an outstanding relevance in offshore and subsea deepwater drilling, as well as production equipment that depends on high strength carbon and low alloy steels. This work addresses failures caused by hydrogen embrittlement that have been documented by the American Petroleum Institute (API) and the Bureau of Safety and Environmental Enforcement (BSEE).

    Dr. Rosas will present his paper on the first day of OTC, Monday April 30th, at 9:30 AM as a part of OTC 2018 Session 006 – Risk Management vs Risk Avoidance at NRG Park in Houston, TX.