Fasteners for top-side applications on Naval ships have historically been steel fasteners. These fasteners when exposed to marine environments suffer extensive corrosion. Alternatives such as high strength stainless steel, nickel alloy and titanium alloy fasteners are being considered. While these alternative materials offer better corrosion resistance than steel, they can suffer from thread galling when used in the uncoated and/or unlubricated condition. Solid film lubricants such as molybdenum disulfide-impregnated epoxy polyimide have shown anti-galling properties. Additionally, anti-seize compounds such as copper loaded grease have also shown anti-galling properties. In a paper on titanium as alternative fasteners1, K. Faller compares titanium fasteners to steel and high strength alternative materials. In this study, Beta-C titanium fasteners are investigated as an alternative fastener for Naval use. Galvanic interactions and thread galling are evaluated to identify candidate coatings or lubricants sothat Beta -C titanium fasteners can be utilized for top-side applications.

Subject
Test methods, Fixtures, Materials, Molybdenum, Solids, Lubricants, Seawater, Graphite, Steel, Titanium, Fasteners, Galvanic corrosion, Grease
Keywords:
titanium, fasteners, solid film lubricants, thread treatments, galling, galvanic corrosion
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1997
GOV
You do not currently have access to this content.