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Silver and silver alloy passivation process

A technology of silver alloy and process, which is applied in the field of passivation process of silver and silver alloy, can solve the problems of complex coating process and non-environmental protection, and achieve the effect of strong operability and good anti-corrosion protection effect

Active Publication Date: 2017-08-08
依波精品(深圳)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of complex coating process and non-environmental protection in the surface coating anticorrosion process of silver and silver alloys at present, the present invention provides a passivation process for silver and silver alloys

Method used

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  • Silver and silver alloy passivation process
  • Silver and silver alloy passivation process
  • Silver and silver alloy passivation process

Examples

Experimental program
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Embodiment 1

[0034] A passivation process for silver and silver alloys, comprising the steps of:

[0035] 1) Silver or silver alloy surface degreasing treatment: place silver or silver alloy in acetone for 30 minutes of ultrasonic treatment, and then dry it with a hair dryer for use;

[0036] 2) Primary passivation treatment: immerse the clean silver or silver alloy treated in step 1) into 6-N,N-dibutylamine-1,3,5-triazine-2,4- In the thiol solution, passivate the self-assembly at 35°C for 20 minutes, take it out, and air dry;

[0037] 3) Curing treatment: place the silver or silver alloy treated in step 2) at 150°C for 15 minutes, then wash and dry with deionized water to obtain a network structure film tightly combined with silver or silver alloy, specifically as figure 1 shown;

[0038] 4) Secondary passivation treatment: the silver or silver alloy after step 3) is placed in isopropanol as a solvent, and stearyl mercaptan and phenylacryltriazole are a solute solution for self-assembly...

Embodiment 2

[0042] A passivation process for silver and silver alloys, comprising the steps of:

[0043] 1) Silver or silver alloy surface degreasing treatment: place silver or silver alloy in acetone for 20 minutes of ultrasonic treatment, and then dry it with a hair dryer for use;

[0044] 2) Primary passivation treatment: immerse the clean silver or silver alloy treated in step 1) into 6-N,N-dibutylamine-1,3,5-triazine-2,4- In the thiol solution, passivate the self-assembly at 50°C for 50 minutes, take it out, and air dry;

[0045] 3) Curing treatment: place the silver or silver alloy treated in step 2) at 160° C. for 15 minutes, then wash and dry with deionized water to obtain a network structure film tightly combined with silver or silver alloy;

[0046] 4) Secondary passivation treatment: the silver or silver alloy after step 3) is placed in isopropanol as a solvent, and stearyl mercaptan and phenylacryltriazole are a solute solution for self-assembly processing, wherein octadecylt...

Embodiment 3

[0050] A passivation process for silver and silver alloys, comprising the steps of:

[0051] 1) Silver or silver alloy surface degreasing treatment: place silver or silver alloy in acetone for 20 minutes of ultrasonic treatment, and then dry it with a hair dryer for use;

[0052] 2) Primary passivation treatment: immerse the clean silver or silver alloy treated in step 1) into 6-N,N-dibutylamine-1,3,5-triazine-2,4- In the thiol solution, passivate the self-assembly at 40°C for 20 minutes, take it out, and air dry;

[0053] 3) Curing treatment: place the silver or silver alloy treated in step 2) at 120° C. for 20 minutes, then wash and dry with deionized water to obtain a network structure film tightly combined with silver or silver alloy;

[0054] 4) Secondary passivation treatment: the silver or silver alloy after step 3) is placed in isopropanol as a solvent, and stearyl mercaptan and phenylacryltriazole are a solute solution for self-assembly processing, wherein octadecylthi...

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Abstract

The invention belongs to the technical field of silver or silver alloy surface passivation and particularly discloses a silver and silver alloy passivation process. The silver and silver alloy passivation process comprises the steps of conducting passivation treatment on the clean surface of silver or silver alloy with a 6-N,N-dibutylamine-1,3,5-triazine-2,4-thiol solution as a first passivation solution for the first time; conducting solidification treatment on a first passivation film obtained after passivation treatment for the first time and solidifying the first passivation film into a net structure film; and conducting passivation treatment on the surface of the net structure film for the second time to obtain a compact composite film with a solution containing thiol and benzotrizaole as a second passivation solution. The process is free of environmental pollution. Complicated equipment is not needed in the whole passivation process. Operability is high. A duplex film comprising the net structure passivation film and the compact composite film has a good corrosion protection effect.

Description

technical field [0001] The invention belongs to the technical field of surface passivation of silver and silver alloys, and in particular relates to a passivation process of silver and silver alloys. Background technique [0002] Silver-copper alloy has a beautiful color and good electrical and thermal conductivity, and is widely used in jewelry, utensils and other industrial fields. In general, silver metal has good corrosion resistance, but it is exposed to air for a long time or exposed to Cl - , SO 4 2- In the presence of such corrosive media, severe corrosion is prone to occur, and the surface will be severely discolored, reducing its performance. [0003] Aiming at the corrosion phenomenon of silver-copper surface, the commonly used surface anti-corrosion measures mainly include electroplating, electroless plating, hot-plating, polymer coating, CVD and diffusion coating, etc. The most used method is the chromate passivation process. However, due to the strong requ...

Claims

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Application Information

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IPC IPC(8): C23C22/02C23C22/68C23C22/73
CPCC23C22/02C23C22/68C23C22/73
Inventor 邬治平向雄志钟飞杨丽
Owner 依波精品(深圳)有限公司
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