A coating treatment process for precious metal products

A processing technology, precious metal technology, applied in metal material coating process, gaseous chemical plating, coating and other directions, can solve the problems of decreased adhesion, easy falling off, inability to resist oxidation and vulcanization, and achieve favorable adhesion. , the effect of improving adhesion

Active Publication Date: 2020-05-19
浙江银之源贵金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under high temperature environment, the adhesion of the oxide film will be greatly reduced, and it is easy to fall off, so it cannot play the role of anti-oxidation and anti-sulfurization for a long time.

Method used

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  • A coating treatment process for precious metal products
  • A coating treatment process for precious metal products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: a kind of precious metal product coating treatment process, comprises the following steps:

[0021] Step 1: pre-cleaning the precious metal substrate to be plated before coating;

[0022] Step 2: Activate the precious metal substrate. Under a vacuum environment with a vacuum degree of 10-20Pa, the pre-cleaned precious metal substrate to be plated is subjected to surface discharge treatment through an ion source discharge treatment system. The treatment method is first Discharge for 10-20min at a temperature of 20-25°C, then paint the activator on the surface of the precious metal substrate, repeat the brushing for 3 times, and then perform discharge treatment, the treatment method is to discharge at a temperature of 25-30°C for 10- 30min, further activate the precious metal substrate;

[0023] Step 3: Turn off the ion source discharge treatment system, re-evacuate to the background vacuum, and then pass in organosilane substances, stabilizers and auxiliar...

Embodiment 2

[0033] Embodiment 2: a kind of precious metal product coating treatment process, comprises the following steps:

[0034]Step 1: pre-cleaning the precious metal substrate to be plated before coating;

[0035] Step 2: Activate the precious metal substrate. Under a vacuum environment with a vacuum degree of 10-20Pa, the pre-cleaned precious metal substrate to be plated is subjected to surface discharge treatment through an ion source discharge treatment system. The treatment method is first Discharge for 10-20min at a temperature of 20-25°C, then paint the activator on the surface of the precious metal substrate, repeat the brushing for 3 times, and then perform discharge treatment, the treatment method is to discharge at a temperature of 25-30°C for 10- 30min, further activate the precious metal substrate;

[0036] Step 3: Turn off the ion source discharge treatment system, re-evacuate to the background vacuum, and then pass in organosilane substances, stabilizers and auxiliary...

Embodiment 3

[0046] Embodiment 3: a kind of precious metal product coating treatment process, comprises the following steps:

[0047] Step 1: pre-cleaning the precious metal substrate to be plated before coating;

[0048] Step 2: Activate the precious metal substrate. Under a vacuum environment with a vacuum degree of 10-20Pa, the pre-cleaned precious metal substrate to be plated is subjected to surface discharge treatment through an ion source discharge treatment system. The treatment method is first Discharge for 10-20min at a temperature of 20-25°C, then paint the activator on the surface of the precious metal substrate, repeat the brushing for 3 times, and then perform discharge treatment, the treatment method is to discharge at a temperature of 25-30°C for 10- 30min, further activate the precious metal substrate;

[0049] Step 3: Turn off the ion source discharge treatment system, re-evacuate to the background vacuum, and then pass in organosilane substances, stabilizers and auxiliar...

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Abstract

The invention discloses a precious metal product plating treatment technology. The technology includes: adopting gold or silver or platinum as the precious metal substrate, first, conducting precleaning treatment on the to-be-plated precious metal substrate, second step, performing activation treatment, third step, utilizing chemical deposition method to react an organosilane substance, a stabilizer and auxiliary discharging gas on the precious metal surface so as to plate an antioxidant film on the metal substrate surface, and finally taking out the precious metal plating product. Specifically, the organosilane substance is a mixture of tetraethyl orthosilicate, 2-(3, 4-cyclohexane oxide)ethyl trimethoxysilane and 3-aminopropyl trimethoxysilane, and the stabilizer is a mixture of cerium zirconium oxide, N, N'-ethylene bis stearamide, bis(acetylacetone)isobutoxy isopropoxy titanate and zinc stearate. The antioxidant film prepared according to the technology has strong substrate adhesion, can play a very good anti-oxidation and anti-sulfurization role, and still can have good adhesion even after a period of time in a high temperature environment.

Description

technical field [0001] The invention relates to a coating process, more specifically to a coating treatment process for precious metal products. Background technique [0002] With the rapid development of the economy and the general increase of people's income, more and more people like to buy and collect precious metal products such as gold, silver and platinum. Most of these precious metals have beautiful color and strong chemical stability. , but during long-term use, precious metals will still react with oxygen and sulfide in the air, especially metallic silver, because the chemical properties of silver are relatively active, and when exposed to the natural environment for a long time, silver is easy to react with oxygen and sulfide in the air. Oxygen or sulfide reaction will cause "black rust" on the surface, which greatly affects the ornamental value of silver products. Therefore, people will coat a layer of film on the surface of silver metal to improve the anti-oxida...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/34C23C16/40C23C16/02C23C16/505C23C16/50
CPCC23C16/0227C23C16/0254C23C16/345C23C16/402C23C16/50C23C16/505
Inventor 孔祥产曾步坚林德允
Owner 浙江银之源贵金属有限公司
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