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Formula of acid plating solution for rhenium iridium alloy coating on surface of glass die and preparation method thereof

A technology of alloy coating and acid plating solution, which is applied in the field of acid plating solution formulation and preparation of rhenium-iridium alloy coating on the surface of glass molds, which can solve the problems of high equipment cost and high preparation cost, and achieve low cost and uniform distribution of components , the effect of excellent corrosion resistance

Active Publication Date: 2018-06-01
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the well-recognized preparation method of rhenium-iridium alloy coating is magnetron sputtering technology, but the preparation cost is high and the equipment cost is expensive

Method used

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  • Formula of acid plating solution for rhenium iridium alloy coating on surface of glass die and preparation method thereof
  • Formula of acid plating solution for rhenium iridium alloy coating on surface of glass die and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Prepare 50mL of plating solution, ammonium perrhenate 0.05mol / L, sodium hexabromoiridate 0.045mol / L, chloroiridic acid hydrate 0.005mol / L, without adding any additives and complexing agents, drop 3mol / L Sodium hydroxide solution to adjust the pH of the plating solution to 5.0, add 0.05mol / L potassium chloride, the deposition temperature is 70°C, and the current density is 50mA / cm 2 ; Conduct constant current electrochemical deposition of rhenium-iridium alloy coating on the surface of the copper electrode. The copper electrode is initially ultrasonically cleaned for larger organic matter, and then the surface oxide is removed in a dilute nitric acid solution. Finally, it is cleaned in acetone or ethanol and blown cold. blow dry. Before plating, a layer of nickel thin film is applied on the surface of the copper substrate, and the plating is carried out. During the plating process, the distance between the workpiece electrode and the platinum sheet of the auxiliary elec...

Embodiment 2

[0018] Prepare 50mL electrolyte, ammonium perrhenate 0.05mol / L, sodium hexabromoiridate 0.045mol / L, chloroiridic acid hydrate 0.01mol / L, complex citric acid 0.045mol / L, additive is sulfuric acid 0.02mol / L, drop 3mol / L sodium hydroxide solution to adjust the pH of the plating solution to 5.0, set the deposition temperature to 70°C, and the current density to 50mA / cm 2 Conduct constant current electrodeposition of rhenium-iridium alloy on the surface of the copper electrode. The copper electrode is initially ultrasonically cleaned for organic matter, and then the surface oxide is removed in a diluted nitric acid solution, and finally cleaned in acetone or ethanol, and dried with cold air. The distance between the workpiece electrode and the auxiliary electrode platinum sheet is about 0.5cm, the deposition time is 30min, the quality of the coating is good, the current conversion efficiency of the alloy is 55%, the thickness of the coating is 5.1um, and the iridium content in the ...

Embodiment 3

[0020] Plating solution formula: ammonium perrhenate 0.043mol / L, sodium hexabromoiridate 0.040mol / L, chloroiridic acid hydrate 0.010mol / L, complex oxalic acid 0.0375mol / L, additive is hydrofluoric acid 0.005mol / L, configure 50mL plating solution, drop 0.02mol / L sulfuric acid solution to adjust the pH of the plating solution to 2.0, add 0.01mol / L potassium chloride, set the deposition temperature to 70°C, and the current density to 100mA / cm 2 ; Conduct constant current electrochemical deposition of rhenium-iridium alloy coating on the surface of mold steel electrodes, and the copper electrodes are preliminarily cleaned by ultrasonic cleaning of larger organic matter, then the surface oxides are removed and activated in sulfuric acid solution, and finally cleaned in acetone or ethanol , blow dry with cold air. Before plating, a layer of chromium film is applied on the surface of the mold steel electrode, and the plating is carried out. The distance between the workpiece electr...

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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 acid plating solution formula 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/18C25D5/36
CPCC25D3/56C25D5/18C25D5/36
Inventor 吴王平江鹏王知鸷张伟汤志鹏
Owner CHANGZHOU UNIV
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