摘要:
A catalytic structure providing high surface area and low resistance to flow is prepared from a powder comprising an alloy containing chromium and copper by depositing the powder on a shaped preform with the aid of a fugitive binder and heating the coated substrate to effect liquid-phase sintering of the powder. In one embodiment an alloy of Cr-Ni-Cu coated on an open mesh preform serves as a catalyst in the purification of an automotive exhaust stream.
摘要:
A nickel-chromium-cobalt alloy containing correlated percentages of niobium, tantalum, titanium, aluminum and also chromium affords high stress-rupture lives in elevated temperatures.
摘要:
A catalyst structure particularly useful in automotive exhaust catalysis comprising a metallic substrate, a catalytic outer surface and a layer of chromium oxide interposed therebetween to inhibit reaction between exhaust gas components and the metallic base.
摘要:
Directed to ferritic nickel steel filler materials for gasshielded arc-welding of cryogenic steels, such as the 9 percent nickel steel, which contain about 7 percent to about 13 percent nickel with specially controlled amounts of manganese and carbon and which produce welds having markedly improved impact resistance at cryogenic temperatures.
摘要:
A four-stage heat-treatment to improve the stress-rupture life and stress-rupture ductility at elevated temperatures of nickelchromium alloys in which a two-stage heat-treatment is used intermediate of an initial solution treatment and a final aging treatment.
摘要:
Electrolytic process for activating essentially solid nickel surfaces, e.g., nickel foil, for use as the positive electrodes in alkaline storage batteries. The electrolyte contains in solution a nickel salt, ammonia and an ammonium salt having the same anion as the nickel salt.
摘要:
A process for electrodepositing nickel deposits of area at least one square decimeter and at least one millimeter thick wherein forces promoting exfoliation of the deposit are balanced against surface roughness of a permanent cathode blank so as to insure adhesion of the deposit to the cathode blank during deposition and enable easy removal of the deposit from the blank after deposition is completed.
摘要:
Disclosed is apparatus and a method for stripping electrodeposits from cathode blanks which apparatus comprises a conveyor for conveying cathodes to a stripping station, a stripping mechanism for stripping electrodeposits from the cathode blanks, quenching devices in the stripping station, a control device for controlling the quenching device so that quenching commences after the stripping mechanism engages the electrodeposit but before the stripping mechanism is activated, and conveyors for conveying stripped electrodeposits and cathode blanks from the stripping station.
摘要:
A process for the production of nickel sulfate which comprises reacting nickel carbonyl, sulfur dioxide and oxygen together to form a mixture of nickel sulfate, nickel sulfite and nickel oxide, converting the nickel sulfite and nickel oxide to nickel sulfate and recovering the thus produced nickel sulfate. Advantageously, the process of the present invention contemplates reacting the nickel carbonyl, sulfur dioxide and oxygen in the gas phase at a temperature of about 100*C.
摘要:
A process for electroplating ABS plastic with decorative nickel chrome plate using an essentially all nickel system involving depositing a sublayer of low strength nickel onto a plastic surface which has been made conductive, depositing over said sublayer a super levelling nickel and depositing chromium on the surface. When the ratio of the thickness of the nickel sublayer to the thickness of the super-levelling nickel is at least about 2, the plated plastic is characterized by good appearance, by excellent resistance to thermal cycling and by excellent resistance to the deleterious effect of corrosive media.