摘要:
Forming a lithium lanthanum zirconate thin film includes disposing zirconium oxide on a substrate to yield a zirconium oxide coating, contacting the zirconium oxide coating with a solution including a lithium salt and a lanthanum salt, heating the substrate to yield a dried salt coating on the zirconium oxide coating, melting the dried salt coating to yield a molten salt mixture, reacting the molten salt mixture with the zirconium oxide coating to yield lithium lanthanum zirconate, and cooling the lithium lanthanum zirconate to yield a lithium lanthanum zirconate coating on the substrate. In some cases, the zirconium oxide coating is contacted with an aqueous molten salt mixture including a lithium salt and a lanthanum salt, the molten salt mixture is reacted with the zirconium oxide coating to yield lithium lanthanum zirconate, and the lithium lanthanum zirconate is cooled to yield a lithium lanthanum zirconate coating on the substrate.
摘要:
Disclosed is a method of using a high molecular mass, saturated hydrocarbon acid to generate a chemical conversion coating on light metal surfaces such as aluminum, magnesium, and titanium and their alloys.
摘要:
A method of bonding a metal to a substrate involves forming an oxide layer on a surface of the substrate, and in a molten state, over-casting the metal on the substrate surface. The over-casting drives a reaction at an interface between the over-cast metal and the oxide layer to form another oxide. The other oxide binds the metal to the substrate surface upon solidification of the over-cast metal.
摘要:
A process is disclosed for the protection of magnesium based alloys containing aluminum by treatment with eutectic mixtures of fused salts to provide a corrosion resistant outer layer on the magnesium based alloy. A suitable fused salt mixture comprises urea and at least one of ammonium nitrate or ammonium nitrite. A magnesium based alloy is also disclosed comprising magnesium and aluminum having a corrosion resistant outer layer comprising magnesium oxide and aluminum oxide; the proportion of aluminum present in the outer layer being enriched in proportion to the amount present in the magnesium based alloy.
摘要:
The surface oxidation process of the zinc or of a zinc coating consists of immersion of the zinc in an electrolytic cell, where a direct current of selected magnitude is driven and where the electrolytic bath consists essentially of a solution in an alkali metal nitrate melted mixture either of an hexavalent oxide of the type XO3 or of a salt of the type Y2XO4 or of a salt of the type Y2Cr2O7, where X represents an element selected in the group of chromium molybdenum and tungstenum and Y an element selected between sodium and potassium. When solution of hexavalent chrome CrH3 in a mixture of melted alkali metal nitrates is used as bath, the oxidizing process can be carried out without current in the cell, by mere immersion of the zinc.
摘要:
The invention relates to a method for producing corrosion-resistant surfaces of nitrated or nitrocarburated steel components, the surfaces having roughness heights (Rz) of Rz≧1.5 μm. The method comprises the following steps: oxidation of the surfaces of the nitrated or nitrocarburated components in a first oxidation step; carrying out at least a second oxidation of the component surfaces in an immediately subsequent oxidation step; polishing the component surface in a final method step, directly after the final oxidation.
摘要:
According to the invention, an anti-corrosion coating on a magnesium workpiece can be generated, whereby a halide salt is applied in at least one surface coat to the workpiece, with a thermodynamic stability less than a salt formed from magnesium and the same halide, such that, during the application of the halide salt to the workpiece and/or under the influence of a corrosive medium the salt with magnesium is formed.
摘要:
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 grit blasted. Then a second coating of a sufficient amount of aluminum or aluminum and silicon is diffused onto the first coating to form a total coating thickness of at least five mils. The surface of the second coating is cleaned and polished to remove the nickel and iron-rich overlay which is present as a result of the coating process and to provide a smooth uniform surface. When ethelyene is produced using furnace tubes which are coated in this manner less coking occurs.
摘要:
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 sodium chloride and potassium chloride.