Abstract: A weldable coated steel sheet comprising a steel sheet substrate and a paint coating layer thereon, said paint comprising at least one of the group consisting essentially of titanium carbide, zirconium carbide, hafnium carbide, vanadium carbide, niobium carbide, tantalum carbide, and chromium carbide in the powder form.

Abstract: An improved method and apparatus for forming an electrical connection between electrical conductors by soldering. A lead wire with a coating of insulating material has a selected portion of the coating removed by a flame from a torch. The bared portion of the lead wire is wrapped around a second conductor such as a terminal, and the two conductors are then immersed in a low temperature, ultrasonically agitated liquid solder bath. The terminal also can have insulation which is burned off by the flame before the soldering takes place. The insulation on the lead wire can be burned off when it is wrapped around the terminal.

Abstract: An impervious wall structure including at least two panels welded along adjoining vertical edges. Stress relief structure is on the panels to facilitate welding of the panels without undesirable deformation thereof. Finally, support structure is provided to assist in reinforcing the panels thereby providing a continuous impervious wall structure adaptable for use over large areas.