Bimetallic corrosion resistant structural joint and method of ma

Details Bimetallic corrosion resistant structural joint and method of ma Bimetallic corrosion resistant structural joint and method of ma

1978-11-13

1980-07-08

Taylor, Dennis L.

Hydraulic and earth engineering

Marine structure or fabrication thereof

Structure protection

52728, 405195, E02D 560

Patent

active

042115035

ABSTRACT:
A corrosion resistant bimetallic structure which includes a pair of butt-welded steel elements having protected surfaces extending to the weld; spaced, protective overlays of corrosion resistant non-ferrous metal joined to portions of the protected surface of each steel element on opposed sides of the weld; and a non-ferrous metal bridging plate bridging the weld and joined to outer sides of the spaced protective overlays by welds using said corrosion resistant non-ferrous metal as the weld metal. The space between the bridging plate, the spaced ends of the protective layers and the steel elements adjacent the weld is sealed against ingress of corrosive liquid.
In a method of making the described structure, the steel elements are welded in end-to-end alignment. Sections of each element spaced from the weld are then encased with a corrosion resistant non-ferrous metal. Each metal encasement is sealed against the steel, and the gap between the ends of the encasing sections of non-ferrous metal is filled with a secondary sealing material, such as an epoxy grout. Finally, the seals and weld are protectively enclosed under a bridging plate of the non-ferrous metal by welding the bridging plate to exposed surfaces of the non-ferrous metal encasements.

REFERENCES:
patent: 646970 (1900-04-01), Francis
patent: 798384 (1905-08-01), Aylett
patent: 910356 (1909-01-01), Carpenter
patent: 2470149 (1949-05-01), Derby
patent: 2791096 (1957-05-01), Morton et al.
patent: 3762173 (1973-10-01), Marsh
patent: 4053247 (1977-10-01), Marsh

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