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7217327 |
A metal member is produced with enhanced corrosion resistance by salt bath nitriding. Specifically, in a nitriding salt bath containing Li + , Na + and K + ions as cation components and CNO − and CO 3 −− ions as anion component...
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6875291 |
A tin layer and a zinc layer are stacked sequentially on a given substrate to form a multilayered film composed of the tin layer and the zinc layer. Then, the multilayered film is heated to a given temperature to form a tin-zinc alloy fi...
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6858097 |
A chromium- and nitrogen-free brightening and passivating treatment for metal surfaces, particularly iron and steel, comprises: at least one acid; at least one substance containing a peroxy moiety; and at least one organic substance sele...
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6830700 |
A method and device for removing particulate matter from a liquid medium, especially a molten salt bath. The structure includes a device for capturing and removing particulate matter from a liquid medium. In operation, the device is inse...
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6746546 |
A composition for nitrocarburizing stainless steel parts and a method for producing a nitride or hard case on such parts using the composition, are provided. The composition includes alkali metal cyanate and alkali metal carbonate, where...
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6730178 |
A metallic base material is covered with a coating layer of intermetallic compound, or a plurality of metallic base materials are welded to each other with an intermetallic compound, with reduced energy consumption within a short period ...
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6632293 |
A hydrogen containing material comprises a first compound including hydrogen containing material and fluoride, and a second compound including a metal which becomes highly reactive with hydrogen when the metal becomes a compound includin...
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6602354 |
A tin layer and a nickel layer are stacked sequentially on a given substrate to form a multilayered film composed of the tin layer and the nickel layer. Then, the multilayered film is heated to a given temperature to form a tin-nickel al...
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6569268 |
A process and an alloy for galvanizing non-reactive steel and mixed or moderately reactive steel for providing a decorative spangle to the galvanized coating. The alloy contains 0.1 to less than 0.8 wt % tin, 0.05 to 0.2 wt % bismuth, 0....
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6548183 |
A metal-based composite material is formed by impregnating a matrix metal of Al or Al alloy into ores of a porous preform of a hydrogenatable metal having a metal hydride in at least a part of its surface.
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6544353 |
The invention relates to a method of treating a liquid gallium or gallium alloy surface for prolonged use as a liquid mirror. The method of the invention comprises the steps of (a) contacting the surface of liquid gallium or gallium allo...
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6521053 |
A substrate is protected by first providing the substrate, and applying a ceramic coating overlying and bonded to the substrate. The ceramic coating is formed of an open-cell solid foam of ceramic cell walls having an interconnected intr...
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6406561 |
A “one-step” method of forming diffused noble metal-aluminide coatings with or without minor incorporations of Si, Cr, Mn, Hf, La, and Y, is disclosed. With the inventive method, two or more powdered metals or metal alloys are applie...
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6284058 |
A method of aluminizing metals with a coating of aluminum or aluminides.
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6221175 |
The method for the production of a ceramic layer on a metallic base material combines the following measures: The base material is preheated. Ceramic coating material is applied to a locally melted surface region of the base material. Th...
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6187116 |
This disclosure relates to an Sn-containing and/or Bi-containing zinc alloy for hot galvanizing steel, more particularly for component galvanizing. The alloy is composed of 1 to 5% by weight of Sn+Bi, 0 to saturation of Pb, 0.025 to 0.20...
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5904783 |
A method for treating a brass fixture having a fluid-contacting surface with lead dispersoids exposed thereon to reduce lead leaching into a fluid supply by contacting the brass fixture with a liquid metal solution selected from the grou...
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5873951 |
The inner surface of ethylene furnace tubes is diffusion coated with a sufficient amount of chromium or chromium and silicon to form a first coating having a thickness of at least two mils. This coating is then cleaned, neutralized, and ...
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5798002 |
In order to produce a carbon solid solution or carbide-containing surface layer on a substrate, the substrate is immersed into a cold bath of liquid active medium, and heated inside the liquid active medium by heating means immersed in t...
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5769966 |
A method for fabricating an electrically insulating coating on a surface is disclosed comprising coating the surface with a metal, and reacting the metal coated surface with a nonmetal so as to create a film on the metal-coated surface. ...
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5753052 |
In a method of increasing the wear resistance and the corrosion resistance f opposed bearing surfaces of parts subjected to reciprocal friction, in particular when the product of the pressure distributed over the bearing surfaces by the ...
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5735971 |
Flawless nitrating layers are obtained during the nitro-carburizing of components made from steels which form passive layers in salt baths if these components are first pre-treated in an oxidizing salt melt at 300° to 500° C. prior to ...
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5683415 |
The invention relates to a surgical needle with a suture material or thread fixed to the end opposite to the perforation tip, characterized in that the puncturing tip and the area of the needle following onto the latter is made up to app...
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5631845 |
A phosphate bath control system and method is provided that tracks the set points of one or more of the major process variables of the phosphate bath independently of variations in the production conditions. A detector determines the cur...
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5629099 |
An alloying-treated iron-zinc alloy dip-plated steel sheet excellent in press-formability, having, on the surface thereof, numerous fine concavities which satisfy the following conditions: (1) that the number of fine concavities having a...
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5576066 |
A process for improving the wear and corrosion resistance of ferrous metal arts consists in immersing the parts, which have previously been treated using a nitriding, diffusion technique, in a molten salt bath comprising carbonates, nitr...
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5514226 |
A salt bath composition is adapted to form a layer of magnetite Fe 3 O 4 on the surface of ferrous metal parts, including nitrided ferrous metal parts, to protect the underlying iron against corrosion. This layer is impermeable and of ...
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5506002 |
A method of galvanizing ferrous linear elements, e.g., tube, pipe, structural shapes, as part of a continuous manufacturing line by passing the axially travelling preheated element through transversely flowing molten zinc.
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5413642 |
An alloy has less stable oxides, e.g. nickel oxide, chromium oxide, and iron oxide on a surface (FIG. 1 ). The material has specific reaction elements such as titanium and aluminum in a relatively low concentration throughout the alloy. ...
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5397652 |
A colored, corrosion resistant architectural material having improved corrosion-resistant properties wherein the material includes stainless steel which is coated with a tin and the tin coated material is post-treated with an oxidizing s...
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5389161 |
After preliminary treatment of their surfaces, the parts are brought into contact within a solution containing, essentially, protons, phosphate anions and cations chosen from Ca 2 +, Sn 2 + and Mn 2 +. The preliminary treatment results i...
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5377398 |
An improved salt and method of using such salt for conditioning scale on strip or sheet metal surfaces is provided. In more particular aspects, the invention provides an improved salt of alkali metal hydroxides and alkali metal nitrates ...
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5265137 |
Methods and apparatus for improving fretting resistance of zirconium alloy components formed into a shape for use in a nuclear reactor are disclosed in which at least a portion of the outer surface of a component is reacted with material...
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5234721 |
A method for forming a carbide coating of Group IVA, VA and VIA transition metals and their alloys. The metal to be coated is heated in a bath of molten alkali or alkaline earth metal containing carbon. There is also provided a method fo...
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5206880 |
A furnace for cracking of hydrocarbons, comprising one or several tubes through which the hydrocarbons flow during intensive heating and subsequent cracking. The starting material for the process can be e.g. naphtha or propane, mixed wit...
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5141574 |
A wear-resistant titanium alloy containing titanium carbides which are crystallized and/or precipitated and are dispersed in the β-phase matrix is disclosed. The alloy may further comprise α-phase and/or additional hard particles dispe...
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5104463 |
A corrosion resistant stainless steel article is provided with a substantly uniform black oxide coating over the surface thereof, the article being formed from a steel alloy in martensitic structure which is treated in a boiling aqueous ...
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5032193 |
A process for fabricating synthetic materials, such as "atomic ceramics", by atomic alloying of a host material. Energetic modifier elements or species are introduced into the host matrix of a fluidic precursor material so as to obtain a...
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4959068 |
A sterile surgical needle having a dark, non-reflective and non-flaking surface. The needle is produced by selecting an appropriately shaped needle having the desired degree of sharpness. The needle is treated to activate the surface and...
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4905695 |
A sterile surgical needle having a dark, non-reflective and non-flaking surface. The needle is produced by selecting an appropriately shaped needle having the desired degree of sharpness. The needle is treated to activate the surface and...
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4902625 |
The present invention is a method of rapidly and reproducibly checking the quality of zirconium base material welds and heat affected zones. In this method, weldment samples are immersed in an elevated temperature fused salt bath for a t...
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4844749 |
A bath for treating a metallic workpiece so as to provide a surface finish thereupon includes a reagent adapted to react with the surface and an abrasive material. Relative agitational motion between the abrasive and the workpiece is pro...
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4837053 |
Filaments are coated with MgO to create an effective diffusion barrier between the filament and the matrix in a metal matrix composite, thereby improving the strength and the service life of the composite.
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4778540 |
A method and a bath agent for forming a carbide or diffusion layer on the surface of an article to be treated by immersing the article in a molten salt bath. The salt bath comprises borax, at least one oxide of a surface layer forming el...
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4715902 |
Process for applying a protective coating to a metal substrate which provides a thermal barrier and a barrier against oxidation of the substrate. The coating material is a mixture of (1) zirconium and/or hafnium and (2) a metal such as n...
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4698237 |
A method of surface hardening a metal surface in which the surface is firstly coated with a colloidal dispersion of graphite and then locally melted, in an inert atmosphere or vacuum, so that the molten metal reacts with the graphite to ...
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4694558 |
Ferrous bimetals bearing easily read indicia and methods of making them. The bimetals of the present invention have a transparent oxide coating of a controlled thickness in the interference range and are prepared by immersing them in a a...
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4671824 |
Process for producing zirconium oxide blue-black coatings on zirconium alloy substrates by treating said alloys with molten salts containing small amounts of oxidizing compounds. The molten salts are sodium cyanide and combinations of so...
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4608092 |
A process for improving the corrosion resistance of ferrous metal parts also subject to heat and chemical treatment following nitriding in association or not with carburizing and/or sulfurizing essentially comprises immersing the parts i...
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4536224 |
There is described a salt bath based on an alkali and/or alkaline earth metal halide with which there can be produced without the use of current adherent and wear resistant boride coatings on metallic workpieces. This bath contains gaseo...
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