CN109837568A - A kind of environment-friendly type high performance non-cyanide alkali silver plating process - Google Patents
A kind of environment-friendly type high performance non-cyanide alkali silver plating process Download PDFInfo
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- CN109837568A CN109837568A CN201711208877.XA CN201711208877A CN109837568A CN 109837568 A CN109837568 A CN 109837568A CN 201711208877 A CN201711208877 A CN 201711208877A CN 109837568 A CN109837568 A CN 109837568A
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- plating process
- environment
- cyanide
- silver plating
- high performance
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Abstract
Invention provides a kind of environment-friendly type high performance non-cyanide alkali silver plating process, belongs to electroplating technology.The electroplate liquid mainly includes complexing agent, main salt, conductive salt, brightener, and pH value is 9.0~11.0.For the problem that existing alkaline silver plating process, plating solution usually contains cyanide and causes environmental pollution, and the present invention provides a kind of environment-protective process of electrosilvering by a kind of non-cyanide alkali silver plating process.The electroplate liquid can be widely applied to field of electroplating without cyanide, silver coating and the strong advantage of basal body binding force.
Description
Technical field
The present invention relates to a kind of electroplating technologies, more particularly to a kind of silver-plated work of environment-friendly type high performance non-cyanide alkali
Skill.
Background technique
Industrialized development, problem of environmental pollution is increasingly severe, for protecting environment, cleaning, environmental protection, energy-efficient production
Increasingly by the attention of industry.In electroplating industry cyaniding plant of silver technique, production process must use cyanide cyaniding plant of silver work
Skill, there is the cyanides of hypertoxicity, its environmental pollution is extremely serious, cause to seriously threaten to worker's health；With
The enhancing of the environmental consciousness of people, an urgent demand develop the silver plating process of environment-protecting clean, substitute traditional cyanide silver plating process.
Therefore, develop new environmentally friendly silver plating process, solve the health problem of problem of environmental pollution and direct labor, there is positive society
Meaning.In fact, countries in the world carry out the research and development to cyanideless electro-plating in electroplating technology always, and with correlation
The progress of technology and new electroplating additive enter market, and the level of cyanogenless electroplating technology is stepping up.
Summary of the invention
In view of this, it is raw to be applied to electrosilvering the invention proposes a kind of environment-friendly type high performance non-cyanide alkali silver plating process
In production, silver layer and basal body binding force well can achieve production technology cleaning, environmentally friendly requirement, can substitute traditional cyanide
Silver plating process solves the problems, such as prior art environmental pollution and the health threat to direct labor.
The technical scheme of the present invention is realized as follows: a kind of environment-friendly type high performance non-cyanide alkali silver plating process, the master
It to include complexing agent, main salt, conductive salt, brightener, in which:
Complexing agent content is 100~200 grams per liters；
Main salt content is 30~100 grams per liters two
Conductive salt content is 20~50 grams per liters two
Bright agent content is 10~100 mg/litres two
The pH value of electroplate liquid is 9.0~11.0；Solvent is water.
A kind of electroplating technology of plating solution for silver-plating of the invention, it is characterised in that: the following steps are included:
(1) metallic silver is put into above-mentioned silver-colored electroplating solution, as anode；
(2) it puts the workpiece in above-mentioned silver-colored electroplating solution, as cathode；
(3) it is passed through DC power supply, 0.5~3 ampere/square decimeter of cathode-current density is 40~55 DEG C of temperature of electroplating solution, electric
The plating time 2~8 minutes.
Cathode-current density is 1.0~2.0 amperes/square decimeter in the step (3)；Temperature of electroplating solution is 45~50
℃；Electroplating time is 4~6 minutes.
Compared with prior art, electroplate liquid of the present invention replaces cyanide complex agent using New Chelating Agents, and what is had is beneficial
Effect are as follows:
1) electroplate liquid is free of cyanide, reaches the requirement of environment-protecting clean production technology, will not ask the health of direct labor
Topic threatens.
2) coating is good with basal body binding force, reaches the technical requirements of electroplated layer binding force.
Specific embodiment
Embodiment
A kind of environment-friendly type high performance non-cyanide alkali silver plating process, the technique mainly include complexing agent, main salt, conductive salt,
Brightener, pH value 10.0 are adjusted with ammonium hydroxide or sulfuric acid.
Electro-plating method: 70 × 100mm of rectangle iron plate is used, plating test, condition are carried out in the Hull cell of 267ml
Are as follows: temperature 50 C, DC current are 1.0 amperes, are electroplated 5 minutes, and anode uses silver plate, obtain test piece A1.
Electroplating effect evaluation: observation test piece A1 appearance, whether coating is bright uniformly, crystallization is careful.
Coat binding strength evaluation: according to ASTM B571 (Usa Metals plate layer adhesion qualitative test) standard, test piece
A1 is heated to 240~260 DEG C in furnace, then takes out cooling in the water for be put into room temperature, and whether observation coating is bubbled or falls off.Such as
Fruit silver layer has bubbling or falls off, then silver layer and substrate combinating strength are unqualified；If silver layer is not bubbled or falls off, silver layer with
Substrate combinating strength is qualified.
Claims (1)
1. a kind of environment-friendly type high performance non-cyanide alkali silver plating process, the electroplate liquid mainly include complexing agent, main salt, conductive salt,
Brightener, in which:
Complexing agent content is 100~200 grams per liters；
Main salt content is 30~100 grams per liters；
Conductive salt content is 20~50 grams per liters；
Bright agent content is 10~100 mg/litres；
The pH value of electroplate liquid is 9.0~11.0；Solvent is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711208877.XA CN109837568A (en) | 2017-11-27 | 2017-11-27 | A kind of environment-friendly type high performance non-cyanide alkali silver plating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711208877.XA CN109837568A (en) | 2017-11-27 | 2017-11-27 | A kind of environment-friendly type high performance non-cyanide alkali silver plating process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109837568A true CN109837568A (en) | 2019-06-04 |
Family
ID=66880452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711208877.XA Pending CN109837568A (en) | 2017-11-27 | 2017-11-27 | A kind of environment-friendly type high performance non-cyanide alkali silver plating process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109837568A (en) |
-
2017
- 2017-11-27 CN CN201711208877.XA patent/CN109837568A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190604 |