摘要:
A covered electrode for welding chloride resistant stainless steel of the type containing about 0.04% carbon, 20% chromium, 24% nickel, 5% molybdenum, and balance iron. The covered electrode provides the capability for producing substantially defect-free stainless steel weld deposits that offer excellent resistance to crevice corrosion, as well as general corrosion in chloride containing environments.
摘要:
The invention provides a bath that is operable at, or close to, pH 7 to deposit a coating of ruthenium on a substrate, e.g. the contacts of electrical switches, which does away with the need to provide a protective coating on the substrate prior to ruthenium plating. The bath consists essentially of (i) a compound or a complex that contains a nitrogen bridge linkage joining together two ruthenium atoms and (ii) an aqueous solution of oxalic acid or an oxalate.
摘要:
A sensitive portable detector for nickel carbonyl is provided which relies on chemiluminescence produced in the presence of ozone and carbon monoxide by pulse-modulating the carbon monoxide feed to the reactor chamber and detecting the resulting modulation of the output signal. The instrument is thus made insensitive to any NO which may be present in the gas sample.
摘要:
Discloses the use of nickel-cobalt alloy strike deposits especially ultra-thin nickel-cobalt alloy strike deposits on directly plateable plastics whereby difficulties encountered in plating directly plateable plastics are obviated and plated objects suitable for service conditions 3 and 4 or equivalent service conditions are provided. Especially advantageous results are obtained when the strike deposit contains at least about 30% cobalt.
摘要:
Ruthenium-iridium electrodeposits are prepared from aqueous acid solution containing ruthenium, iridium, a fluoborate salt, fluoboric acid, and optionally sulfamic acid. The baths are especially useful for preparing insoluble anodes.
摘要:
An electroforming mandrel providing exceptional resistance to mask removal in highly corrosive electrolytes. The mandrel relies on a molecular bond between a non-conductive polymer mask and the electrically conductive polymer plating surface to avoid separation of these members and to allow multiple reuse. A metal core acts as a structural member and serves to uniformly distribute current to the electrically conductive polymer.
摘要:
A self-shielding, flux cored arc welding electrode for joining Ni-Cr-Fe alloys and overlaying dissimilar metals. The wire has a nickel-chromium containing alloy sheath and a flux core containing special proportions of carbonates, fluorides, metal oxides, and powdered metals. Sound welds can be prepared without the use of a supplemental inert shielding gas. Welded joints provide essentially the same properties as those of the Ni-Cr-Fe base alloy.
摘要:
An electrodeposition mandrel for nickel electrodeposition having islands of bare metal surface finished by grit blasting with either cast iron grit or aluminum oxide grit to a RMS surface finish of about 130 to 300.mu. inch when cast iron grit is employed and about 25 to about 150.mu. inch when aluminum oxide grit is employed.
摘要:
Ferruginous sulfide minerals containing non-ferrous metal values, such as nickel and cobalt are treated to concentrate the non-ferrous metal values in metallic iron. An intimate admixture of finely-divided non-ferrous-metal-bearing ferruginous sulfide minerals, iron oxide, and a suitable reducing agent is maintained at a temperature between about 800.degree. C. and 1000.degree. C. in an atmosphere non-oxidizing to iron to produce a metallic iron alloy containing the non-ferrous metal values from the sulfide minerals. The heated admixture is cooled and the concentrated non-ferrous metal values in the iron alloy are recovered by magnetic separation or hydrocloning.
摘要:
Discloses the use of spatially extended particles of a solid characterized by a low apparent density distributed within a mass of metal hydride material used in a pressure vessel for storing hydrogen.