CN85102279A - The composite silver coating of the anti-electroerosion of galvanic deposit - Google Patents
The composite silver coating of the anti-electroerosion of galvanic deposit Download PDFInfo
- Publication number
- CN85102279A CN85102279A CN85102279.0A CN85102279A CN85102279A CN 85102279 A CN85102279 A CN 85102279A CN 85102279 A CN85102279 A CN 85102279A CN 85102279 A CN85102279 A CN 85102279A
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- Prior art keywords
- silver
- micron
- silver coating
- lanthanum trioxide
- composite
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Electroplating And Plating Baths Therefor (AREA)
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Abstract
The method of employing composite electrodeposition deposits one deck based on silver on copper or other metallic matrixes, contain to account for coating volume 0.1-2%, and particle diameter is the lanthanum trioxide particulate of 0.5-20 micron.This compound silvering has higher microhardness, and HV reaches 90-100, and than fine silver much higher wear resistance and anti-erosion property, electric property and fine silver are close, and the upper layer that is used for electrical contact can be saved the silver of 50-85%.
Description
The invention belongs to the manufacturing of low-voltage apparatus electrical contact.
At present, the electrical contact on the low depressor of general household electrical appliance and little electric current all adopts fine silver, the multiple ag material manufacturing of silver alloys or copper base.This manufacture method consumption silver amount is big, and the hardness of fine silver low (HV is 50), and is not wear-resisting, not anti-electric etch, though silver alloys hardness is higher, electrical property is poor slightly, and the manufacture craft of multiple silver contact and equipment are all complicated.
Since the sixties in this century, composite electrodeposition technique is developed rapidly, through whole patents of machine examination WPI.1970-1984, finds no and closes electro-deposition method manufacturing Ag-La
2O
3The report of electrical contact.
Characteristics of the present invention are to adopt the method for composite electrodeposition deposit one deck on copper or other metallic matrix to have the electric etch of resisting, attrition resistant composite silver coating is made electrical contact, disperse has and accounts for coating volume 0.1-2%'s in this composite silver coating, lanthanum trioxide particulate with anti-electric etch and wear resisting property, particle diameter is between the 0.5-20 micron, this composite deposite has good electrical property as the upper layer of electrical contact, its resistivity and contact resistance and fine silver are close, but anti-electric erosion, wear resistance and microhardness all improve a lot than fine silver, HV reaches 90-100, this composite silver coating contact of 100 micron thickness is at voltage 220V, electric current 5A, power factor is 0.6 when above, switch life is more than 50,000 times, compare with the fine silver contact, adopt the compound silver-plated contact of copper base can save silver 50-85%, obvious social and economic benefit are arranged.
Compound silver plating process condition of the present invention is as follows:
Silver chloride 35-40 grams per liter
Potassium cyanide 65-80 grams per liter
Lanthanum trioxide particulate (particle diameter＜5 micron) 0.1-50 grams per liter
Bath temperature 15-30 ℃
Cathode current density 0.1-1 peace/decimetre
2
Anode is pure limit plate, and plating bath fully suspends particulate by mechanical stirring or plating bath circulation.
Adopt compound silver plating process of the present invention, can obtain the compound silvering of thickness 10-200 micron as required.
Claims (2)
1, a kind of is the electrical contact manufacturing that basic composite deposite is used for household electrical appliance and little heavy-current low-voltage electrical apparatus with silver, it is characterized in that disperse has the lanthanum trioxide particulate that accounts for coating volume 0.1-2% in composite silver coating, and particle diameter is between the 0.5-20 micron.
2, be galvanic deposit in the cyanide silver plating solution that is added with the lanthanum trioxide particulate according to the described composite silver coating of claim 1, the add-on of lanthanum trioxide is the 0.1-50 grams per liter, and particle diameter is the 0.5-20 micron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85102279 CN1010108B (en) | 1985-04-01 | 1985-04-01 | Erosion resistant composite silver coating by electrodeposition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85102279 CN1010108B (en) | 1985-04-01 | 1985-04-01 | Erosion resistant composite silver coating by electrodeposition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85102279A true CN85102279A (en) | 1987-07-29 |
| CN1010108B CN1010108B (en) | 1990-10-24 |
Family
ID=4792391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85102279 Expired CN1010108B (en) | 1985-04-01 | 1985-04-01 | Erosion resistant composite silver coating by electrodeposition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1010108B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005119737A1 (en) | 2004-06-04 | 2005-12-15 | Fudan University | Ion trap mass analyzer |
| CN110923785A (en) * | 2019-12-11 | 2020-03-27 | 哈尔滨东大高新材料股份有限公司 | Method for preparing silver alloy/copper alloy composite contact material for circuit breaker by codeposition |
-
1985
- 1985-04-01 CN CN 85102279 patent/CN1010108B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005119737A1 (en) | 2004-06-04 | 2005-12-15 | Fudan University | Ion trap mass analyzer |
| CN110923785A (en) * | 2019-12-11 | 2020-03-27 | 哈尔滨东大高新材料股份有限公司 | Method for preparing silver alloy/copper alloy composite contact material for circuit breaker by codeposition |
| CN110923785B (en) * | 2019-12-11 | 2022-04-22 | 哈尔滨东大高新材料股份有限公司 | Method for preparing silver alloy/copper alloy composite contact material for circuit breaker by codeposition |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1010108B (en) | 1990-10-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WD01 | Invention patent application deemed withdrawn after publication | ||
| C13 | Decision | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| C14 | Grant of patent or utility model | ||
| C19 | Lapse of patent right due to non-payment of the annual fee |