Abstract: Disclosed is a bright welded seam can of tinplate having a side seam formed by welding, wherein each of the inner and outer surfaces of the side seam has an outermost surface layer having a thickness of 50 to 400 A and being composed of oxides and a subsequent intermediate layer composed of an iron-tin alloy, which has a thickness corresponding to 5 to 100% of the thickness of the whole tin layer in the tinplate blank, and wherein the inner and outer surfaces of the side seam have a reflectance corresponding to at least 60% of the reflectance of the tinplate.This bright welded seam can is excellent in the appearance of the seam, the corrosion resistance and the adhesion of the coating.

Abstract: Steel surfaces are protected from erosion and corrosion by a coating which includes at least three metallic layers of increasing normal potential from the base layer lying on the steel surface to that layer farthest from the steel surface. Also, the base layer immediately adjacent the steel surface has approximately the same normal potential as the steel surface.

Abstract: Wear and corrosion resistant coatings are obtained using the plasma or d-gun techniques and applying a coating material consisting of carbides and nickel-containing base alloy having 6-18 wt.% boron.

Abstract: An abradable seal material suitable for high temperature application in turbomachinery comprising a sintered mat of (1) randomly disposed fine metal fibers, or (2) fine metal powders or (3) both fibers and powders. The metal fiber and powder are composed of an alloy consisting essentially of I, Al, Cr, II, or I, Al, Cr, III, wherein I is at least one member of the group Fe, Co, Ni, and Co plus Ni, II is a member of the group consisting of Y, Sc and Rare Earths, and III is at least one member of the group consisting of Si, Hf, Zr, Cb, and Ta. The exposed surfaces of the fibers and powder forming the seal are protected against oxidation at high temperatures by a coating of Al.sub.2 O.sub.3 which is formed on the substrate. Said substrate has an Al content of at least 4% to replace spalled Al.sub.2 O.sub.3 and for "healing" any Al.sub.2 O.sub.3 scale fractures.