CN1016079B - Decorative electroplating technology with zinc alloy as base plating layer - Google Patents
Decorative electroplating technology with zinc alloy as base plating layerInfo
- Publication number
- CN1016079B CN1016079B CN 89100436 CN89100436A CN1016079B CN 1016079 B CN1016079 B CN 1016079B CN 89100436 CN89100436 CN 89100436 CN 89100436 A CN89100436 A CN 89100436A CN 1016079 B CN1016079 B CN 1016079B
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- per liter
- electroplating technology
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Abstract
The present invention relates to an electroplating technology with low cost and high brightness, which is characterized in that a bright ground plating layer is made from a zinc-iron-cobalt chloride, and then, a surface plating layer is plated, such as a thin copper alloy plating layer or a chromium plating layer. The layers have the advantages of stable technology, high brightness, high resistance to corrosion, good smoothness, nontoxic plating solution and high current efficiency. Since iron-zinc and monosalt are used to replace expensive metal nickel and a chromium complex, the cost of the technology is greatly reduced, and the cost is 3.2 times lower than that of the existing nickel-chromium roller plating technology and is 1.3 times lower than that of a copper-tin alloy chromium roller plating technology. The present invention can be used for electroplating decorative and protective plating layers.
Description
The invention belongs to the improvement of the electroplating technology of the above different metal coating of one deck.
Iron and steel was when in addition part carried out protective or decoration chrome plating in the past, at first nickel plating or nickelalloy prime coat, copper-beryllium then, last chromium plating.For iron and steel, nickel, Rhometal, copper, copper alloy all belong to cathodic electrodeposition coating, even thicker coating can not guarantee not occur hole, under the atomospheric corrosion condition, a small amount of hot spot always appears, these hot spots can manifest the iron rust of brown very soon, thereby have caused the heavy corrosion of iron and steel metal.Not only protective is poor, and is ornamental influenced, especially will expend a large amount of heavy metal nickels and chromium complex, the cost costliness.Deutsches Reichs-Patent DE3705949A1 discloses a kind of dilute acid electroplating solution galvanizing technique, contain at least a ion in zine ion and nickel ion, cobalt ion, the iron ion in its solution, and the poly hydroxyl compound that can be dissolved in three or more hydroxyls of having of solution, wherein have at least a hydroxyl to be replaced by hydroxyl oxygen base or-oxyl.Though this kind technology can make the zinc coating grain refining, improve the quality of traditional zinc coating, but grey and dendroid line shape still appear in coating, do not reach the degree of minute surface light, it can't use as the prime coat of decorative coating, because the last slight particle in surface all can influence decorative appearance and effect.
The decorative electrolyticplate craft that the purpose of this invention is to provide the above different metal coating of one deck, its prime coat are the zinc-iron cobalt-base alloy, and its additive need not above-mentioned auxiliary agent, technology is simple, and prime coat can reach the degree of minute surface light, and protective is good, decorative electroplating is effective, and cost is also lower.
The present invention is achieved in that the in addition part that at first will have the clean surface electroplates (barrel plating or hang plating etc.) zinc-iron cobalt-base alloy prime coat.Contain cobalt salt in its solution composition, (as CoCl
4, COSO
4Deng), ferrous salt is (as FeCl
2, FeSO
4Deng), zinc salt is (as ZnCl
2, ZnSO
4Deng), muriate is (as NH
4Cl
2, KCl, NaCL etc.), buffer reagent (as boric acid, sodium-acetate etc.), stablizer (as xitix, ammonium sulphite, hydrazonium sulfate etc.) and L-105 brightening agent (market can be bought, Wu Jia mill, Nanpi County, Hebei province Electroplate Factory produce); Negative electrode is other part, and anode adopts zine plate and pure plate; Plate overlay coating at last, as light brass, light tin-cobalt alloy, copper alloy, or chromium plating etc.Its prime coat solution composition (unit: grams per liter) can contain zinc chloride 40-100, iron protochloride 20-80, ammonium chloride 120-220, cobalt chloride 1-10, L-105 lacquer 4-6, and stablizer and buffer reagent.Stablizer can be xitix, and content is the 0.5-3 grams per liter, and buffer reagent is a boric acid, and content is the 10-40 grams per liter.Service temperature is not generally limit, and is preferably 4-40 ℃, and current density is 〉=0.5A/dm
2Better.Above-mentioned optimal components contains zinc chloride 60-80, iron protochloride 30-50, ammonium chloride 160-180, boric acid 20-30, L-105 brightening agent 4-6, xitix 1-2.In order to make luminance brightness etc. better, preferably add Triammonium citrate 0.3-3 grams per liter in the composition, general PH is adjusted into 4.5-5.5.
When being used for chrome-plated process, can on the prime coat basis, plate one deck (barrel plating or hang plating) copper alloy earlier, last chromium plating (barrel plating or hang plating).For effective, the copper alloy solution composition contains (unit grams per liter) cuprous cyanide 10-40, zinc oxide 1-6, sodium stannate 5-20, sodium cyanide 5-30, sodium hydroxide 2-12, Seignette salt 10-60.Be preferably cuprous cyanide 15-20, zinc oxide 2-3, sodium stannate 10-15, sodium cyanide 10-15, sodium hydroxide 5-8, Seignette salt 20-25.
The present invention compared with prior art, technology is simple, plating bath is nontoxic, the coating luminance brightness is good, good corrosion resistance, and decorative electroplating is effective, cost is specially adapted to the protective and the decorative electroplating of two or more different metal coating than low 3.2 times of existing barrel nickel plating-chromium process.
Embodiment:
1, adopts this processes bicycle bell part in addition, with blank tumbling 2 hours in the drum that is added with alkaline degreasing liquid, after the cleaning, soaked hydrochloric acid 2-4 minute, pack into after cleaning up in drum barrel plating light zinc-iron cobalt-base alloy 2 hours, the flowing water flushing, barrel plating copper alloy 0.5-1 hour hangs chromium plating then.Prime coat solution composition (unit grams per liter): zinc chloride 50, iron protochloride 80, ammonium chloride 160, cobalt chloride 10, anti-base hematic acid 2, L-105 brightening agent 6, Triammonium citrate 3, PH=4.5-5.5,20 ℃ of service temperature room temperatures, current density 2.5A/dm
2, the thick 10-16 μ m that is generally of coating.Electro-coppering alloy electroplating bath composition (unit grams per liter): cuprous chloride 30, zinc oxide 4, sodium stannate 15, sodium cyanide 20, sodium hydroxide 10, Seignette salt 40, current density 2A/dm
2, about 20 ℃ of service temperatures, thickness of coating 2-4 μ m.Our factory adopts this technology to produce the part export trade in addition of nearly 10T bicycle bell.
2, part hardware parts such as zero diopter pad, plum blossom pad, screw are after tumbling is handled, and barrel plating zinc-iron cobalt-base alloy 1.5-2 hour barrel plating copper alloy 0.5-1 hour then, has behind the barrel plating chromium and the same good surface appearance of former barrel nickel plating chromium process again.Prime coat solution composition (unit grams per liter): zinc chloride 90, iron protochloride 30, ammonium chloride 20, boric acid 20, cobalt chloride 3, xitix 1.2, L-105 brightening agent 4.5, Triammonium citrate 0.5, PH=4.8-5,25 ℃ of service temperatures, current density 1.5A/dm
2Electro-coppering alloy electroplating bath composition (unit grams per liter): cuprous cyanide 12, zinc oxide 2, sodium stannate 8, sodium cyanide 10, sodium hydroxide 5, Seignette salt 20, current density 3A/dm
2, about 30 ℃ of service temperatures.Antirust ability improves greatly after tested, reduces cost 3.5 times.
Below be several performance index contrasts:
(1), brine soaking experiment.Saline soak condition: in 40 ℃ the 5% NaCl aqueous solution, soaked 3 hours, take out the back and be hung on indoor without cleaning.Thickness of coating is 15 μ m.
Dissimilar coating brine soaking experiment results see Table 1:
Table 1
Kind nickel-chromium-copper tin-chromium zinc-iron cobalt-copper alloy-chromium
Time
Begin white rust
Time (hr) 42
Begin red rust
Time (hr) 51 45 231
(2) salt-fog test neutral salt spray test.Test method and standard are according to the Machinery Ministry standard laid down by the ministries or commissions of the Central Government.Test conditions: 50 ± 1g/lNaCl solution, PH=6.5-7.2, T=35 ± 2 ℃, the 8 hours static room temperatures of spraying continuously were one-period (seeing Table 2) in 16 hours.
Table 2
Kind nickel-chromium-copper tin-chromium zinc-iron cobalt-copper alloy-chromium
Time
Begin white rust
Time, (hr) 24(had slight white point)
Begin red rust
Time (hr) has rust spot 24(that rust spot is arranged) 24(do not have rust spot)
(3) alloy layer combining power test
Sample: 40 * 50 * 1mm low-carbon (LC) steel disc, coating total thickness are 50 μ m, and alternating bending is until fracture, the aliquation phenomenon of not peeling.Get same test piece and in 200 ℃ of baking ovens, be incubated 1 hour, take out the back and in cold water, cool off, do not have the bubbling and peeling phenomenon.(seeing Table 3)
Table 3
Barrel plating barrel plating copper tin barrel plating zinc-iron cobalt-copper
Nickel (hr) alloy (hr) alloy (hr)
6 7 2.5
Can boost productivity more than one times by finding out in the table.
(4), save energy, boost productivity.
3, adopt the product of this processes, as paper clip, through pre-process and post-process, barrel plating zinc-iron cobalt-base alloy 1 hour, (prescription is with 1) plates white potin 0.5 hour (Dai Ge) again, and outward appearance is very bright attractive in appearance.The high tin of comparable barrel plating reduces cost 30%
Claims (10)
1, a kind of electroplating technology, it is characterized in that, at first will have the steel-iron components electrogalvanized iron cobalt-base alloy prime coat of clean surface, contain zinc chloride 40-100 grams per liter in the bath element, ammonium chloride 120-220 grams per liter, iron protochloride 20-80 grams per liter, cobalt chloride 1-10 grams per liter, L-105 brightening agent 4-6 grams per liter (production of Wu Jia mill, Nanpi County, Hebei province Electroplate Factory) and stablizer, part is a negative electrode, anode adopts zine plate and pure iron plate, and then the plating overlay coating.
2, electroplating technology according to claim 1 is characterized in that, said stablizer is an xitix, and content is the 0.5-3 grams per liter.
3, electroplating technology according to claim 1 is characterized in that, contains zinc chloride 60-80 grams per liter in the bath element, iron protochloride 30-50 grams per liter, ammonium chloride 160-180 grams per liter, cobalt chloride 1-10 grams per liter.
4, electroplating technology according to claim 1 is characterized in that, service temperature is 4-40 ℃, and current density is 〉=0.5A/dm
2
5, according to claim 1,2,3 or 4 described electroplating technologies, it is characterized in that, add Triammonium citrate 0.3-3 grams per liter in the plating bath.
6, electroplating technology according to claim 5 is characterized in that, adds buffer reagent in the plating bath.
7, electroplating technology according to claim 6 is characterized in that, buffer reagent is a boric acid, and content is the 10-40 grams per liter.
8, electroplating technology according to claim 6 is characterized in that, during the plating overlay coating, and first copper-beryllium, chromium plating again.
9, electroplating technology according to claim 6 is characterized in that, the bath element of copper-beryllium is a cuprous cyanide 10-40 grams per liter, zinc oxide 1-6 grams per liter, sodium stannate 5-20 grams per liter, sodium cyanide 5-30 grams per liter, sodium hydroxide 2-12 grams per liter, Seignette salt 10-60 grams per liter.
10, electroplating technology according to claim 9 is characterized in that the copper-beryllium bath element is a cuprous cyanide 15-20 grams per liter, zinc oxide 2-3 grams per liter, sodium stannate 10-15 grams per liter, sodium cyanide 10-15, sodium hydroxide 5-8 grams per liter, Seignette salt 20-25, grams per liter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89100436 CN1016079B (en) | 1989-01-22 | 1989-01-22 | Decorative electroplating technology with zinc alloy as base plating layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89100436 CN1016079B (en) | 1989-01-22 | 1989-01-22 | Decorative electroplating technology with zinc alloy as base plating layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1040632A CN1040632A (en) | 1990-03-21 |
| CN1016079B true CN1016079B (en) | 1992-04-01 |
Family
ID=4853863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89100436 Expired CN1016079B (en) | 1989-01-22 | 1989-01-22 | Decorative electroplating technology with zinc alloy as base plating layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1016079B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047038B (en) * | 2014-06-30 | 2016-09-14 | 句容市博远电子有限公司 | A kind of nickel chromium triangle copper-cobalt alloy electroplate liquid and compound method thereof |
| CN108950627A (en) * | 2018-07-11 | 2018-12-07 | 深圳市美之高科技股份有限公司 | A kind of chloride galvanizing+tin cobalt zinc ternary alloy is for chromium process method |
-
1989
- 1989-01-22 CN CN 89100436 patent/CN1016079B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1040632A (en) | 1990-03-21 |
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