Abstract: Continuous lengths of metal foil, such as 4 micron thick nickel foil stored in coils, are perforated by anodic etching through a perforated titanium mask while foil and mask are simultaneously moving together through electrolytic etching bath.

Abstract: Articles are electroplated with ruthenium in plating bath containing ruthenium cationic complex [Ru.sub.2 N(NH.sub.3).sub.8 X.sub.2 ].sup.3+. Bath provides advantages of enabling plating in alkaline solution, where desired, and avoids difficulties of protecting articles against attack by acid electrolyte baths.

Abstract: A method for the preparation of an iron-titanium-mischmetal alloy which is used for the storage of hydrogen. The alloy is prepared by air-melting an iron charge in a clay-graphite crucible, adding titanium and deoxidizing with mischmetal. The resultant alloy contains less than about 0.1% oxygen and exhibits a capability for hydrogen sorption in less than half the time required by vacuum-melted, iron-titanium alloys.

Abstract: Apparatus and method for water atomizing molten metal to provide a low oxygen metal powder. A molten metal stream is introduced to an atomization vessel containing a pressurized inert gas. The metal stream is atomized, by impingement of high pressure water within the atomization vessel. The atomization vessel has an exit aperture located so that the slurry of water and metal powder can exit from the atomization vessel only after deflection within the atomization vessel. Inert gas contained within the atomization vessel and entrapped within the slurry during atomization begins to leave the slurry during deflection, the inert gas returning to the atomization vessel atmosphere. The inert gas removal process continues after passage through the exit aperture and entrance into a closed degassing vessel.

Abstract: Nickel is electrowon from aqueous, all-sulfate electrolytes containing small, controlled amounts of sulfur-free hydrocolloidal polymers of intermediate molecular weight. Operable hydrocolloidal polymers include dextrin, gum arabic and water-soluble cellulose derivatives.

Abstract: Metal powders are hot isostatically pressed in a can or container produced from superplastic metal sheet.

Abstract: Process and apparatus for underwater geophysical exploration to prepare surveys of undersea floor areas having solid minerals, such as manganese nodules, dispersed at sea floor surfaces transmits and perceives special acoustic vibrations providing information useful for identifying and delineating sea floor areas where desirably large amounts of solid minerals are present.

Abstract: A dispersion-strengthened ferritic alloy is provided which has high temperature strength and is readily fabricable at ambient temperatures and which is useful as structural elements of liquid metal fast breeder reactors.

Abstract: A process for the precipitation of metallic sulfides, e.g., nickel, cobalt or zinc sulfides, from aqueous metal-ion-containing solution comprising passing hydrogen sulfide through the metal-containing solution while the solution is at a temperature of about 75.degree. C. and at a pH of about 2 to about 3 and maintaining said pH during the time of hydrogen sulfide addition by continuous addition of alkali to the solution. The precipitated metal sulfide is characterized by a relatively large particle size by a high settling rate and by ease of filterability.

Abstract: Apparatus for continuously conducting processes of cleaning, pickling or other fluid treatment of small articles such as metal turnings, cuttings, tags, bolts or coin blanks has rotating inclined drum carrying internal scroll with interruptions for providing countercurrent flows of treatment fluid flowing downward and articles moving upward; special embodiments provide for multiple stage treatments passing through plurality of coaxially rotating drums.

Abstract: Prealloyed powders, particularly of compositions which are difficult to work by conventional means, are subjected to forces such that strain energy is imparted thereto by virtue of which the prealloyed powders manifest low flow stress and a high degree of thermoplasticity.

Abstract: A method of providing a hard film on stainless steel comprising treating the stainless steel in an aqueous solution of chromic and sulfuric acids to provide a film and then treating the metal containing the film in an aqueous solution of a water-soluble silicate for a period of time sufficient to harden the film.

Abstract: High-chromium nickel alloys containing special amounts of cobalt and other ingredients are found to afford a good combination of both hot and cold workability, together with corrosion resistance, stability and high temperature stress rupture characteristics.

Abstract: A process is disclosed for producing a high density spray cast metal body from a highly energetic atomized metal stream by directing said atomized stream into the interior of a mold and causing said stream to scan and fill said mold interior by effecting relative movement between said atomized metal stream and said mold, thereby producing a fine grained spray cast metal body of high density.

Abstract: Nickel-iron and nickel-iron-cobalt alloys contain chromium and gamma-prime hardening elements in proportions balanced according to special compositional relationships providing desired thermal expansion, inflection temperature, strength and ductility characteristics, particularly including notch strength needed in machinery and structures subjected in use to varying temperatures and thermal gradients where operating temperatures become elevated above 500.degree. F.

Abstract: A method for compressing and sintering metal powder into solid form for use as metal coatings and structures. Metal powder is enclosed in a pressure-resistant container in contact with a metal bladder. The bladder contains a heat-decomposable substance which upon heating provides gaseous pressure to expand the bladder and compress and sinter the metal powder. The compressed and sintered metal powder can be used as a metal coating upon a metal surface or as a solid metal article by removal of the surface on which the metal powder was formed.

Abstract: A process which enables cumulative recovery of nonferrous metal values from manganiferous sea nodules and a limonitic ore comprises treating the limonitic ore in an aqueous acidic medium under reducing conditions to extract nonferrous metals and iron from the ore and form a solution containing ferrous iron and then leaching the sea nodules with such solution to extract nonferrous metals from the sea nodules and precipitate a predominant amount of the iron as hydrated ferric oxide.

Abstract: A process is provided for extracting iron values as soluble ferrous salts from a limonitic ore which comprises leaching the ore in an acidic medium in the presence of a reducing agent, the reducing agent being a sulfide. Non-ferrous metal values are also extracted from the ore and they may be selectively separated from the solubilized iron salts.

Abstract: The resistance to general corrosion and stress corrosion cracking of manganese-nickel alloys are improved through the incorporation of special amounts of chromium and iron.

Abstract: Matrix-stiffened nickel-iron-chromium-columbium solid-solution alloy with excellent metallurgical stability has heat-resistant and corrosion resistant characteristics especially useful for articles needed to sustain stress in long-time service at elevated temperatures, particularly including superheater tubing in steam power plants. Alloy also has good workability and thermal response characteristics for commercial production of heat-treated wrought products.