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A kind of antioxidant silver and preparation method

A technology of silver oxidation and anti-oxidation, which is applied in the direction of liquid chemical plating, metal material coating process, coating, etc., can solve the problem of losing the protective effect of silver parts, unsatisfactory weather resistance of anti-silver discoloration agent, aging of protective film Degradation and other problems, to achieve the effect of improving the anti-oxidation effect, improving the anti-oxidation ability, and good film-forming performance

Active Publication Date: 2021-06-25
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the weather resistance of this anti-silver discoloration agent is still unsatisfactory, and the protective film formed by it still undergoes aging and degradation behavior under the joint action of light, water vapor and air, and loses its protective effect on silver parts.

Method used

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  • A kind of antioxidant silver and preparation method
  • A kind of antioxidant silver and preparation method
  • A kind of antioxidant silver and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Inorganic nano film of the present invention, SiO 2 , B 2 o 3 , ZnO and K 2 The weight ratio of O is 45:10:15:30.

[0026] Its specific preparation process includes the following steps:

[0027] 1) Preparation of precursor solution: weigh 20g TESO (tetraethyl orthosilicate), 200g H 2 O and 40g polyethylene glycol, after mixing uniformly in a 500ml beaker, adjust PH=9 with ammonia water, stir at room temperature for 12h, slowly add 0.97g (CH 3 O) 3 B, 0.57g Na 2 [Zn(OH) 4 ] and 1 g K 2 O, after the stirring is completed, a transparent sol-like solution is obtained, which is the precursor.

[0028] 2) Preparation of anti-oxidation silver: immerse pure silver in the precursor solution, coat with a pull coater, dry naturally, and perform heat treatment according to the following heating procedure:

[0029]

[0030] After the heat treatment, the anti-oxidation silver is obtained. The anti-oxidation silver will not be corroded and discolored in the atmosphere, sw...

Embodiment 2

[0032]Inorganic nano film of the present invention, SiO 2 , B 2 o 3 , ZnO and K 2 The weight ratio of O is 50:10:10:30.

[0033] Its specific preparation process includes the following steps:

[0034] 1) Preparation of precursor solution: weigh 100g TESO, 1000g H 2 O and 200g polyethylene glycol, after mixing uniformly in a 2500ml beaker, adjust PH=9 with ammonia water, stir at room temperature for 12h, slowly add 4.5g (CH 3 O) 3 B, 1.74gNa 2 [Zn(OH) 4 ] and 5g K 2 O, after the stirring is completed, a transparent sol-like solution is obtained, which is the precursor.

[0035] 2) Preparation of anti-oxidation silver: immerse pure silver in the precursor solution, coat with a pull coater, dry naturally, and perform heat treatment according to the following heating procedure:

[0036]

[0037] After the heat treatment, the anti-oxidation silver is obtained. The anti-oxidation silver will not be corroded and discolored in the atmosphere, sweat, hydrogen sulfide atmos...

Embodiment 3

[0039] Inorganic nano film of the present invention, SiO 2 , B 2 o 3 , ZnO and K 2 The weight ratio of O is 60:5:15:20.

[0040] Its specific preparation process includes the following steps:

[0041] 1) Preparation of precursor solution: weigh 200g TESO, 2000g H 2 O and 400g polyethylene glycol, after mixing uniformly in a 5000ml beaker, adjust PH=9 with ammonia water, stir at room temperature for 12h, slowly add 3.7g (CH 3 O) 3 B, 4.2gNa 2 [Zn(OH) 4 ] and 4.9 g K 2 O, after the stirring is completed, a transparent sol-like solution is obtained, which is the precursor.

[0042] 2) Preparation of anti-oxidation silver: immerse pure silver in the precursor solution, coat with a pull coater, dry naturally, and perform heat treatment according to the following heating procedure:

[0043]

[0044] After the heat treatment, the anti-oxidation silver is obtained. The anti-oxidation silver will not be corroded and discolored in the atmosphere, sweat, hydrogen sulfide atm...

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Abstract

The invention belongs to an anti-oxidation material, in particular to an anti-oxidation silver and a preparation method, comprising silver, the surface of the silver is covered with an anti-oxidation film, and the anti-oxidation film includes the following components in parts by weight: silicon dioxide 45-60 parts, boron oxide 5-10 parts, zinc oxide 5-15 parts, potassium oxide 20-30 parts. The film is nano-scale, dense and transparent, uniform and continuous, does not affect the appearance and feel of pure silver, and has anti-oxidation, high temperature resistance, and good weather resistance, effectively solving the problem of easy oxidation and discoloration of pure silver.

Description

technical field [0001] The invention belongs to an anti-oxidation material, and in particular relates to an anti-oxidation silver and a preparation method. Background technique [0002] Sterling silver is a beautiful silvery-white metal with attractive metallic luster and collection value. It is favored by people, so it has the reputation of women's metal and is widely used as jewelry, decorations, silverware, tableware, congratulations Gifts, medals and coins. There are mainly three grades of silver for traditional decoration: sterling silver, 958 silver and 925 silver, among which 958 silver and 925 silver are binary alloys composed of copper as an alloying element. No matter what brand of silver it is, there is a problem of easy discoloration. In the atmospheric atmosphere, the surface of the jewelry will lose its white luster after a period of time and turn yellow and black, which seriously affects the ornamental effect of the jewelry. [0003] In order to improve the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/12
CPCC23C18/1208C23C18/1241C23C18/1291
Inventor 代林涛李贵覃小龙陈兰谭霖
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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