Improving corrosion resistance of fastener systems for improved integrity, safety and reduced cost

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Fasteners such as nuts and bolts are integral in providing safe and reliable operation of structures across infrastructure, marine and oil & gas industries in Canada. Although they are relatively low-cost items, their failures may result in catastrophic consequences. Corrosion is recognized as the foremost contributor to fastener failure. Corrosion is a naturally occurring phenomenon with a staggering estimated direct cost of $46.4 billion in Canada (2003). Intermetallica based in Vancouver BC has developed a surface treatment for steels that enables a new class of corrosion resistant alloys. Materials made of intermetallic compounds have been the subject of significant research and development efforts over the past decades due to their special physical, chemical and/or mechanical properties. It has been observed that alloys can exhibit a high hardness, possess an increased mechanical strength, resist corrosion and oxidation and/or improve friction and wear behaviour. This project will aim to characterize intermetallic surface alloys, explore the application to ASTM A193-B7 fastener systems and evaluate the potential of this technology to improve corrosion resistance, extend service life and enhance the safety and integrity of Canadian infrastructure assets. A screening test protocol will be developed in order to rapidly determine performance relative to incumbent coating technologies employed for topside corrosion protection.