Abstract: A non-lubricated component configured to have friction contact with another component and machine systems including the component are provided. In an embodiment, by way of example only, the non-lubricated component includes an outer surface consisting essentially of rhenium having a purity of at least 99%, by weight. The outer surface of the non-lubricated component is capable of being substantially wear- and gall-resistant when contacted by another component at a stress of above 50 ksi.

Abstract: An actuator that at least inhibits the deleterious effects of corrosive fluids, such as salt-laden air, does not rely on relatively expensive materials. At least a portion of the actuator housing is sealed from the surrounding salt-laden air, and is in fluid communication with an air reservoir that includes a supply of relatively salt-free, or substantially salt-free, air. The actuator is configured to exchange air between the air reservoir and the actuator housing, thereby at least substantially inhibiting the ingress of salt-laden air into much of the actuator.