A kind of acid plating solution of rhenium-iridium alloy coating on glass mold surface and preparation method thereof

Abstract

The invention discloses a formula of an acid plating solution for a rhenium iridium alloy coating on surface of a glass die and a preparation method thereof. The formula of the acid plating solution is characterized by comprising of 0.001-0.5mol / L of perrhenate, 0.001-0.45mol / L of sodium hexabromoiridate, 0.001-0.25mol / L of chloriridium acid hydrate, 0.001-0.95mol / L of oxalic acid treated as a complex or (and) 0.001-0.95mol / L of citric acid treated as the complex, and additives, wherein the additives include one or a plurality of 0.001-0.035mol / L of sulfuric acid, 0.001-0.045mol / L of nitrous acid, 0.001-0.020mol / L of hydrofluoric acid, and 0.001-0.015mol / L of hydrogen bromide. The preparation method comprises the steps of dissolving all the above-mentioned components in deionized water; adding 1.0-3.0mol / L of sodium hydroxide or 1.0-3.0mol / L of ammonium hydroxide solution to regulate the pH of electrolyze to be 1.5-6.5; and then electrolytically depositing a rhenium iridium alloy coating on the surface of a conductive die workpiece electrode through constant current or pulse, wherein the rhenium iridium alloy coating contains 1-85at% of iridium, the thickness of the coating is 1nm-100 microns, and the current efficiency is up to 50-90%, so that the amorphous or (and) nanocrystalline rhenium iridium alloy coating is obtained. The amorphous or (and) nanocrystalline rhenium iridium alloy coating is uniform in component distribution, high in combination intensity, outstanding in corrosion resistance, high in hardness, high in oxidation resistance, high in mechanical stability,resistant to abrasion, resistant to high temperature and releasability. Therefore, the service life of the glass die can be effectively prolonged.

Description

technical field

[0001] The invention belongs to the field of the mold industry, and in particular relates to an acidic plating solution for a rhenium-iridium alloy coating on the surface of a glass mold and a preparation method thereof. Background technique

[0002] Aspherical glass lens is a very important optical part with extremely high imaging quality and imaging resolution, and is widely used in modern high-tech fields such as aviation, aerospace, astronomy, laser, and medicine.

[0003] Although the traditional glass grinding and polishing technology has its own unique advantages, it takes a lot of time to process aspheric lenses and the production efficiency is low. At present, glass molding technology is applied to process glass lenses, which has the characteristics of short material flow distance, high forming precision and suitable for mass production. However, during the glass molding process, the mold is in contact with the highly chemically active molten glass,...

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