Abstract: An exceptionally effective chromium free corrosion protective surface treatment composition for aluminum and its alloys is an aqueous acidic liquid comprising water and: (A) from about 0.8 to about 1.2 w/o of H.sub.2 ZrF.sub.6 ; (B) from about 0.08 to about 0.12 w/o of dispersed silica; (C) from about 0.08 to about 0.12 w/o of a water soluble or dispersible polymer of 3-(N-methyl-N-2-hydroxyethylaminomethyl)-4-hydroxystyrene; and (D) from 0.10 - 0.15 w/o of 1-propoxy-2-propanol. The surface to be treated is contacted with the composition and then dried without rinsing. A conventional organic coating may advantageously be applied over the surface produced by this treatment.

Abstract: This invention is an apparatus and method for applying sealant to a countersunk fastener hole. The apparatus comprises a sleeve, an adapter tube within the sleeve, a nozzle housing attached to the adapter tube, and a tip within the nozzle housing. A guide pin is attached to the adapter tube and follows an oblique slot in the sleeve. To operate, the sealant applicator is inserted into a countersunk fastener hole, engaging the tip with the countersink of the hole. The tip depresses into the nozzle housing, ejecting sealant onto the countersink. The adapter tube is pushed into the sleeve, moving the guide pin along the oblique slot in the sleeve. This guide pin movement rotates the adapter tube, nozzle housing and tip, causing the tip to uniformly spread the sealant around the countersink.

Abstract: Pinhole and blister formation during autodeposition coating of active metal objects, particularly galvanized steel, other zinciferous surfaces, and even ordinary steel that has been abraded, scratched, or otherwise strained, can be greatly reduced by exposing the active metal surfaces to a solution containing cystine before using a autodeposition process itself, or by adding cystine to an otherwise conventional autodeposition composition.

Abstract: A method for manufacturing an organic semiconductor thin film (24) having an improved characteristic as a semiconductor is provided. A phthalocyanine compound having amino groups is mixed with stearic acid to form a bonded substance capable of being dissolved in an organic solvent. Then, an organic solution is made by dissolving this bonded substance in the organic solvent. By developing this organic solution on a water (20) surface, the thin layer (23) of this bonded substance is formed on the water (20) surface. Thereafter, this thin layer is moved onto a substrate (30) and accumulated to be deposited on the substrate (30). Next, the stearic acid is volatilized and removed from the above described thin film (23) deposited on the substrate (30) by baking the whole substrate. The thus structured organic semiconductor thin film (24) is used as a semiconductor material such as a photoelectric transfer device, a gas sensor, a transistor and the like.

Abstract: A composition is provided which, when applied to a metal surface, forms a corrosion-inhibiting film thereon. The composition comprises an epoxy resin, an effective amount of a curing agent for the epoxy resin, an alcohol, and a hydrocarbon diluent. The composition is applied by contacting the metal surface with the composition as one solution or as a hydrocarbon solution of the epoxy resin and a solution comprising the alcohol and the curing agent. The composition is particularly useful in the treatment of down-well metal surfaces in oil and gas wells to inhibit the corrosion of the metal.

Abstract: An infrared burner with an extremely low pressure drop is described. The burner comprises a corrosion resistant mesh screen having a thick porous coating of ceramic fibers deposited thereon. In addition to a low pressure drop the burner has structural integrity and ability to generate energy at a high rate. The burner is produced by admixing ceramic fibers with a polymeric material which burns off upon heating.

Abstract: A method of depositing a silicon dioxide film on the surface of a substrate such as alkali-containing glass by bringing the substrate into contact with a treating solution comprising a hydrosilicofluoric acid solution supersaturated with silicon dioxide, which is obtained by increasing the temperature of a hydrosilicofluoric acid solution substantially saturated with silicon dioxide.

Abstract: A method is provided for making a flexible superconductive composite wire by drawing a wire of noble metal through a melt formed from solid superconducting material. The preferred superconducting material comprises the Bi-Sr-Ca-Cu-O class of materials.

Abstract: A process for converting a fluid system of a machine from an oil based fluid system to a water based fluid system. A solvent and perfluoroethylene resin are added to the fluid system in sufficient amounts to remove extraneous matter from and coat the surfaces within the fluid system with the perfluoroethylene resin. The oil based fluid, solvent and perfluoroethylene resin are circulated throughout the fluid system for a time sufficient to remove extraneous matter and coat the surfaces. The fluid system is evacuated of the oil based fluid, solvent and residual perfluoroethylene resin, and a water based fluid is added to the fluid system.

Abstract: A metal treatment solution comprising an effective amount of a soluble or dispersible compound which is a derivative of a polyphenol. The present invention comprises novel derivatives of polyphenol compounds useful in the treatment of the surface of metal articles. The present invention also encompasses novel surface treatment solutions or dispersions, and methos of using these solutions or dispersions. The compositions of the present invention include amine oxide containing polyphenol compounds and derivatives thereof. The molecular weight of the polyphenols used in derivatives of the present invention have molecular weights of from about 360 to about 30,000 or greater. The resulting derivatives of the present invention typically have a molecular weight of up to about 2,000,000 with molecular weights within the range of about 700 to about 70,000 being preferred.

Abstract: An effective autodeposition bath with low volatile organic compound emissions can be compounded with polymer solids made by polymerizing a mixture of monomers consisting of certain acrylates and other monomers. E.g., a suitable mixture is, in percents by weight, 44% butyl acrylate, 36% acrylonitrile, 10% styrene, 7% methacrylic acid, 2% of the methyl ether of methacrylamide, and 1.5% of hydroxyethyl acrylate.

Abstract: Process and apparatus for forming a plastic coating on a metal strip. A metal strip is cleaned, surface treated, coated with an electrostatically charged plastic powder in an enclosed chamber using a plurality of spray guns positioned on both sides of the strip, inductively heated to above the melting point of the powder, and maintained in an infrared heater until the fused powder is flowed into a coating having a smooth surface and a uniform thickness. Thermoplastic and thermosetting coatings, having thicknesses of at least 10 microns formed using total induction and infrared heating times of less than 60 seconds, can be fabricated without cracking.

Abstract: A material and process for providing a corrosion inhibitor cationic film on he exterior aluminum surface of a weapon when contained in a submarine launch tube. An effervescent tablet containing a corrosion inhibitor material is disposed within the launch tube with the weapon and, upon flooding of the launch tube with seawater, the effervescent tablet releases the corrosion inhibitor material into the water to form a solution that coats the exposed aluminum surfaces of the weapon with a cation film of the corrosion inhibitor material.

Abstract: Plant for treating water from a first pipe to protect the internal walls of a pipework, including a storage tank (R) for powdered lime, a loop (2) for bleeding water from the first pipe (1), a lime saturator (S) located on the loop (2), and structure (3, 4, 5) for adding powdered lime from the storage tank (R) into the saturator (S). The loop (2) includes, upstream of the saturator (S), relative to the direction of water flow, a decarbonator (D) fed with water which is to be treated. A second pipe (6, 2) which connects the outlet of the saturator (S) with the first pipe (1) includes a loop (7) for recycling a part of the material from the saturator (S) to the decarbonator (D). The structure for adding powdered lime includes a pipe (5) which receives the powdered lime and which connects the outlet of the decarbonator (D) with the inlet of the saturator (S).

Abstract: An autodeposition bath for coating steel and similar metals is operated initially with a low content of dissolved iron and at a high oxidizing potential. After the iron content has increased beyond a specific level, such as 1.5 g/l, the oxidizing potential is reduced. This permits continued satisfactory operation of the bath with lower rates of iron accumulation in the bath, so that the need for bath stabilization by removing dissolved iron is deferred.

Abstract: An aqueous solution containing a new ferric ferrous salt Fe.sub.2 Cl.sub.5 and a method of producing the same are provided. Said aqueous solution contianing said Fe.sub.2 Cl.sub.5 may include both the aqueous solution of said Fe.sub.2 Cl.sub.5 and the aqueous mixture of said Fe.sub.2 Cl.sub.5 and a salt of alkali metals or a compound containing a metal which belongs to zinc family. A method of producing said Fe.sub.2 Cl.sub.5 comprises dissolving ferric chloride into aqueous solution of sodium hydroxide and then neutralizing said resulting aqueous solution by hydrochloric acid or dissolving ferrous sulfate into aqueous solution of hydrochloric acid, and a method of producing said aqueous mixture comprises adding said Fe.sub.2 Cl.sub.5 into an aqueous solution of strong acid and then adding a salt of alkali metals or a compound containing a metal which belongs to zinc family. Said aqueous solution containing said Fe.sub.2 Cl.sub.

Abstract: Metal surfaces are treated with an aqueous medium containing a phosphate diester of a hydroxyacrylate or methacrylate containing a hydrocarbon chain having from 7 to 16 carbon atoms. The treated metal surfaces give improved retention of adhesive strength when adhesives are subsequently applied.

Abstract: An autodepositing coating composition for coating metallic surfaces comprising resin, persulfate, and optionally, fluoride, and having a pH of at least about 6.

Abstract: A method for salt bath-nitriding a metal member having a blind hole, which comprises supporting the metal member so that the open side of the blind hole is directed upward, filling a salt bath-nitriding agent into the blind hole and immersing the resultant metal member in a salt bath melt.

Abstract: A method of treating the surface of an optical structure which comprises forming on the surface a thin layer of organic polymer using a solvent casting technique. Preferably the process includes the subsequent treatment of the polymer layer with a solution of a specific ligand.Complex formation between the bound ligand and its specific binding partner present in a sample to be analyzed alters the optical properties of the diffraction grating surface and the change can form the basis of an assay method.

Abstract: An improved method for inhibiting inland atmospheric corrosion of steel by a sacrificial coating of aluminum, galvanically activated by small surface deposits of metallic indium is disclosed.

Abstract: Aqueous-based basecoat compositions, useful for application to metal and/or plastic substrates, comprise an anionic polyurethane principal resin and an anionic acrylic pigment grind resin. The compositions are particularly adapted to application to substrates over a wide range of ambient humidities and have quick drying characteristics. The incorporation of an anionic acrylic grind resin, which is compatible with the anionic polyurethane principal resin, produces a coating which has good pigment wetting and dispersion characteristics with improved shelf life and color stability.

Abstract: A method and apparatus for providing to an anti-rust treatment a peripheral portion a shell such as is associated with a brake booster and which comprises a pair of cylindrical members disposed in abutting relationship with each other and fastened together by a staking operation which occurs by applying a shearing action to the periphery of the abutting members at a plurality of locations. The substantially cylindrical shell is held at an angle with respect to the horizontal, and then driven for rotation. A vehicle containing an anti-rust paint is disposed below the rotating shell, and the shell is positioned so that its axis of rotation does not intersect the vessel. As the shell rotates, the shear-staked peripheral portion of the shell is successively brought into dipping relationship with the paint.

Abstract: The invention is a method of making an electrode which comprises applying to an electroconductive nickel-containing substrate a coating solution of metal oxide precursor compound(s) and an etchant capable of etching the surface of the substrate and/or any previously applied coating, heating to remove volatiles from the so-coated substrate to cause the metal values of the precursor compounds and those etched from the substrate or previous coating to be concentrated and recoated on the substrate or previously applied coating, and further heating, in the presence of oxygen, air or an oxidizing agent, to a temperature sufficient to oxidize the metal values.

Abstract: An biocidal protective coating and an method for coating heat exchanger coils, which includes a polymeric composition comprising an organic water resistant polymer and a compound of the general formula ##STR1## wherein X is selected from the group consisting of organic ions, H.sup.T, Group I metals, Group II metals and transition metals, R and R' are independently selected from the group consisting of hydrocarbons and substituted hydrocarbons of not more than 24 carbon atoms, and there is at least one free hydroxyl group.

Abstract: A coated-wire electrode for potentiometrically titrating surfactant molecules having more than ten carbon atoms includes an electrically-conductive core coated with a semipermeable membrane. The membrane matrix included a polymer, a plasticizer and an ion-exchange material consisting essentially of dimidium bromide or disulphine blue in suitable proportions to be surfactant selective. The membrane is responsive to anionic, cationic and amphoteric surfactants as well as alkoxylated nonionic surfactants.

Abstract: A method, and aqueous emulsion, for coating a metal part with a peelable mask that is resistant to attack by the strong acid and strong base etchants used in chemical milling are disclosed. The method comprises contacting a polyvalent metal cation salt-surfaced part with an anionic emulsion for a time period effective to coat the part. The anionic emulsion includes coalescent rubbery particles and pigment and has a total solids content of at least about 10 weight percent. The weight ratio of pigment to rubbery particles is about 0.1:1 to about 2:1, respectively.

Abstract: A method is disclosed for carrying out the electroless coating of metals with tin. The coating is surprisingly carried out in a bromide brine of very corrosive nature, without causing the corrosion of the metal. Coating is very quick.Coating media for metal immersion, as well as processing conditions, are disclosed.

Abstract: A method of ceramic coating a substrate by thermodeposition from a sol made by hydrolyzing and peptizing organometallic compounds in water. The sol contains colloidal particles having a size between about 0.0005 micron and about 10 microns and the deposited coatings have good packing characteristics as well as smoothness. Composite coatings are also deposited which contain reinforcing materials such as SiC embedded in the coated matrix. These coatings afford the substrate onto which they are coated excellent wear, anti-corrosion and insulating characteristics.

Abstract: A method of fabricating an electrode which comprises an intimate mixture of finely divided electroactive material in a matrix composed of a conjugated backbone polymer which comprises the steps of: derivatizing the surface of finely divided alkali-metal alloying metal, alkali metal cation inserting material or anion inserting material with active polymer catalyst; dispersing the derivatized metal or material having a desired small particle size in a gas, suspension or solution of a monomer or other precursor of the desired conjugated backbone polymer and polymerizing the monomer and/or precursor in the presence of the dispersed metal or material; and fabricating a cohesive solid by recovering the polymerization product from said gas, suspension or solution comprising derivatized metal or material coated with conjugated backbone polymer and forming same into a cohesive solid.

Abstract: An amphiphilic high polymer comprises a linear recurring unit containing at least divalent organic group (R.sub.1) having at least two carbon atoms, at least divalent organic group (R.sub.2) having at least two carbon atoms, and at least one C.sub.10-30 hydrocarbon-containing group (R.sub.3) which may have one or more substituent groups, said organic groups R.sub.1 and R.sub.2 being connected to each other by a divalent connecting group, and said hydrocarbon-containing group R.sub.3 being boned to said recurring unit by a covalent bond, and the method for producing the same comprises polycondensating a combination of monomers containing R.sub.1 and R.sub.2.

Abstract: An electrode having a coating comprising at least two layers, at least one layer being a polymer network cross-linked by high energy radiation or chemically, and a method of producing such an electrode. The electrode is useful as a sensor for molecular oxygen, or as an ampermometric sensor with an enzyme or antibody immobilized in the cross-linked polymer layer.

Abstract: A process for forming a filter and the product filter are disclosed. The filter uses a porous metal substrate, preferably in the form of a tube, preferably formed of stainless steel particles having a diameter of from 30 to 100 micrometers and a pore size of from 1 to 10 micrometers. A slurry of metal oxide particles of from 0.2 to 1.0 micrometer diameter is applied to the porous metal substrate which is dried and then the particles are sintered together by heating. The preferred metal oxides is TiO.sub.2.

Abstract: This invention relates to a process, which comprises spreading a metallomacrocyclic polymer dissolved in an organic, water-immiscible solvent on a water surface, removing the solvent to form a monomolecular, uniformly oriented film of said polymer on the surface of the water, immersing a substrate in the water, and withdrawing the substrate from the water, whereby said polymer film is transferred from the water surface to the substrate.

Abstract: A biocompatible covering, soluble in body fluids, surrounds the fixation helix of an implantable cardiac electrode as the electrode, and its adjoining lead, are inserted intravenously to a selected cardiac chamber. The covering size and shape are selected for protection of blood vessels and other body tissues during insertion, and for exposure of the fixation element shortly after its proper positioning. The covering may be applied to the fixation element by a dip coating process, or formed separately by casting or injection molding, for later attachment to the lead distal end using an adhesive.

Abstract: An electrosurgical knife includes a stainless steel blade whose surface is abraded or etched, a first coat of primer material applied over the blade, where the surface of the primer material is also abraded or etched, and a second coat of non-stick fluorinated hydrocarbon material applied over the coat of primer material to cover the primer material, for a total thickness of about three mils. The stainless steel blade is completely covered by the coatings but the thickness of the coatings is not so great as to prevent conduction of radio-frequency electrical energy from the blade through the coatings to tissue being cut.

Abstract: A dark heater is produced by a method which comprises coating the first coating layer made of an insulating material with a suspension containing heat-resistant particles having a high thermal emissivity, such as W particles, while 0.5 to 1.5 wt. % of a volatile matter such as water remains in the first coating layer to form a dark coating layer. Since the suspension having a low viscosity can be used, the thickness of the dark coating layer can be made highly uniform and the emission characteristics of the heater can be stabilized.

Abstract: Corrosion preventives, e.g. for automobiles, comprise sepiolite clays with waxes, sulfonates e.g. SACI, optional solvents, oils, soaps provide high viscosity, high solids, corrosion-preventatives. Application can be by hot spray or hot melt, hot dipping, and other standard techniques. The sepiolite clays provide excellent anti-sag capabilities to the dry films without excessively increasing the viscosity of the coating material. Conventional thixatropes such as bentonites and other common organo clays usually drastically increase product viscosity and complicate pumping at room temperature.

Abstract: A layer element comprises a base having a hydrophobic surface and, applied on this, one or more solid, thin, ordered layers of defined uniform and regular structure, in particular monolayers or multilayers, having a uniform orientation of the layer-forming molecules in one direction. The said layers are formed from a metallomacrocyclic polymer which is fusible and/or soluble in an organic, water-immiscible solvent and is of the general formula [M(Pcyc)O].sub.n, where M is Si, Ge or Sn, (Pcyc) is a complex-forming centrosymmetric polycyclic ring system, in particular a phthalocyanine ring system having hydrophobic substituents, and n is the mean degree of polymerization and is equal to or greater than 3. The novel layer elements can advantageously be produced by the Langmuir-Blodgett technique, in which a solid-like monolayer produced on a water surface from the metallomacrocyclic polymers is transferred to a substrate having a hydrophobic surface by immersion and withdrawal of the said substrate.

Abstract: Corrosion of ferrous metal and aluminum surfaces, in particular, is inhibited by a layer of an organic-metallic complex of a polyamine with a (i) metal oxide, or (ii) metallate ion, or (iii) water-soluble metallate salt, in aqueous systems having a pH greater than about 7. The polyamine contains at least four (4) amine groups, two of which are secondary amine groups. The effect of the N atoms stretched over the length of the polyamine produces a "caging effect"0 which immobilizes the oxide, or metallate ions, thus forming the protective layer. The organic-metallic complex deposited on the metal's surface forms the "amine-metallic" layer which may be either an "amine-metal oxide complex" which is a coordination complex, or, an "amine-metallate complex". The amine-metallate complex may be either an ionic complex of "amine.

Abstract: A process of forming a solid granular film is disclosed, which comprises dispersing solid granules into a liquid with the aid of a dispersant, removing the dispersant from the resulting dispersion to suspend the solid granules at the vapor-liquid interface, and transferring the solid granules onto a support, whereby high covering power is attained with respect to solid granules.

Abstract: A method of coating a metal part with a peelable mask which is resistant to attack by the strong acid and strong base etchants used in chemical milling is disclosed in which the metal part is surfaced with a layer of polyvalent metal salt, such as calcium nitrate, and then immersed in a high solids content anionic emulsion of coalescent rubbery particles heavily pigmented to contain at least about 45% total solids content and at least 20% pigment, the pigment to binder ratio being from 0.75:1 to 1:0.51. The salt-surfaced metal part is held in the anionic emulsion until the desired coating thickness has been anodically deposited thereon, and then the coated part is removed and baked to complete the formation of the mask. The rubbery particles are preferably constituted by an anionic polychloroprene homopolymer emulsion which is used in admixture with a curing agent for the homopolymer, like zinc oxide, and a polyvinylidene chloride latex.

Abstract: A method of applying solventless varnish to stator windings in electrical machinery. A magnetic core having a plurality of stator windings disposed in the slots of the core is positioned above a tank containing a solventless varnish, and the tank is then raised to immerse the end turns of the windings on one end of the core into the varnish. The windings are energized to heat them and the varnish which adheres to the end turns to reduce the viscosity of the varnish. The tank is then lowered and the stator and windings are inverted so that a portion of the reduced viscosity varnish which adheres to the end turns flows downwardly through the slots of the stator. This is repeated until varnish begins to flow freely through the slots to the other end, thereby indicating that good coating of the winding within the slots has been accomplished.

Abstract: A hydrophilic film-forming composition which comprises a resin paint comprising a resin binder component and a paint vehicle with a solid ion exchange resin powder dispersed in the vehicle. A film produced therefrom has durable hydrophilic properties, and when combined with a suitable undercoat corrosion resistance is also improved.

Abstract: A method of manufacturing a rust-proof, leak-proof and air-impervious welded tire rim by providing a pair of rim bodies each of which includes a peripheral bead and at least one of which includes a valve seat defined by an opening and with the rim bodies being welded to each other along an exterior circumferential weld; liquid-cleaning the welded rim; and applying to the entirety of all exposed surfaces of the rim an air-impervious coating of resilient copolymeric material whereby any porosity of the circumferential weld is sealed against air migration and the rim beads and valve seat are all totally coated with a resilient air-impervious coating for effectively sealing against air migration in association with a tire bead and an air valve body, respectively.

Abstract: Disclosed is a method of insulating ferromagnetic amorphous metal strip by coating the strip with a composition of about 3 to about 32% of a metal alkoxide having a general formula of M(OR).sub.n, where M is an alkoxide forming metal, R is alkyl, and n is the valence of the M, about 56 to about 96% of a solvent for the metal alkoxide, about 1 to about 12% water, and about 0.001 to about 0.01% of an acid. The coated strip is heated at a temperature above the temperature at which the metal alkoxide hydrolizes and polymerizes and the water and solvent evaporate, and below the temperature at which the amorphous metal crystallizes. Also disclosed is ferromagnetic amorphous metal strip insulated with a coating of glass that is about 0.001 to about 0.02 mils thick.

Abstract: An aqueous autodepositing coating composition for coating metallic surfaces comprising resin, persulfate and, optionally, fluoride, which is effective in coating at a pH of about 4 to about 8.5.

Abstract: Self-healing coatings are formed by first phosphating or nitriding ferrous parts, then coating with an emulsion of e.g. polysiloxane, oil, sorbitan derivative and sodium sulfonate, butyl cellosolve, oleic acid. Preferred phosphating is to a thickness of 2,000-3,000 mg Zn phosphate/square foot. This coating passes 240-plus hours in 5% salt spray (ASTM B-117) and resists wash off with car wash soap.

Abstract: The present invention is directed to improved conductive primer composition and methods. In the improved methods aspect of the present invention, a non-conductive polymeric component is precoated with a primer to render it electroconductive in preparation for electrocoating. Next, the primed polymeric component is assembled with a conductive matallic component to form a multi-material workpiece. Finally, the formed workpiece is submerged in an electrocoat bath for simultaneously electrocoating both the primed polymeric component and the conductive metallic component. In some preferred embodiments, the workpiece may be an automobile chassis.In the improved electroconductive primer compositions aspect of the present invention, such compositions comprise a dispersion of approximately 70% to 90% of a polymeric resinous binder which will cure to form a film, approximately 10% to 30% of a conductive carbon pigment, approximately 0.2 to 0.

Abstract: This invention relates to a composition and method for producing a surface layer with a high specific surface on iron, aluminum, zinc, and on technical alloys of these metals. The composition provides an adhesive layer that may be subsequently used to securely bind other materials, and organic materials in particular, to the surface of the metal or alloy. The composition may be applied by spraying under pressure, by dipping, or as a paste at ambient temperatures. The composition is predominantly amorphous, and provides a uniform, stable, and economical method of priming metals for the reception of a final outer coating.