Abstract: A tie-down mechanism for securing a snowmobile to a trailer wherein the trailer has an elongated track member embedded in the upper surface thereof which defines an elongated opening in the upper end thereof. The tie-down mechanism comprises a bolt having a head portion which is received in the channel of the track member so that the threaded shank thereof extends upwardly therefrom. An elongated ski bar is mounted on the bolt above the track member and has end portions which are adapted to be positioned over the skis of the snowmobile. An actuating lever is threadably mounted on the bolt above the ski bar and is pivotally movable between locked and released positions. When the lever is in its locked position, the ski bar is drawn into engagement with the skis of the snowmobile to maintain the snowmobile in place on the trailer.

Abstract: Structural components of nickel-containing alloys within molten alkali metal systems are protected against corrosion during the course of service by dissolving therein sufficient aluminum, silicon, or manganese to cause the formation and maintenance of a corrosion-resistant intermetallic reaction layer created by the interaction of the molten metal, selected metal, and alloy.