WO1996028590A1 - Lösung zum elektrolytischen abscheiden von zink- oder zinklegierungsüberzügen - Google Patents
Lösung zum elektrolytischen abscheiden von zink- oder zinklegierungsüberzügen Download PDFInfo
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- WO1996028590A1 WO1996028590A1 PCT/EP1996/001048 EP9601048W WO9628590A1 WO 1996028590 A1 WO1996028590 A1 WO 1996028590A1 EP 9601048 W EP9601048 W EP 9601048W WO 9628590 A1 WO9628590 A1 WO 9628590A1
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- Prior art keywords
- zinc
- solution according
- solution
- sulfur dioxide
- layers
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/22—Electroplating: Baths therefor from solutions of zinc
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc
Definitions
- the invention relates to an aqueous, alkaline, cyanide-free solution for the electrolytic deposition of shiny and bubble-free zinc or zinc alloy coatings with a uniform layer thickness on curved substrate surfaces
- Electrolytic zinc or zinc alloy baths are used to deposit zinc coatings or their alloys.
- the layers fulfill a decorative task. Therefore the layers have to be uniformly shiny. This includes that area in a wide Strom confuse ⁇ , for example, 0, 1 A / dm 2 to 1 5 A / dm 2, no coarse-grained metal layers (so-called burn marks) are deposited, that no matte zinc layers and no Form pores in the coating
- zinc and zinc alloy layers are used as corrosion protection for less noble and corrosion-sensitive substrate materials, such as, for example, ferrous metals.
- substrate materials such as, for example, ferrous metals.
- Corrosion protection is improved in many cases by post-treatment of the zinc and zinc alloy layers with chromate solutions, whereby chromate layers form on the zinc layers. These are colored and can be produced in different colors depending on the composition of the chromating solutions. As a result, other decorative designs are possibilities opened up.
- the zinc layers must therefore also allow good chromability. This includes that the chromating layer adheres well to the zinc layer and does not form any cracks, since the corrosion resistance of the chromated zinc and zinc alloy layers would otherwise be very low.
- Zinc baths for the electrolytic deposition of such zinc coatings are described in various publications.
- Cyanide bath types in which zinc salts are dissolved as cyanide complexes have long been known. These baths are strongly alkaline. The layers deposited from these solutions are sufficiently smooth and shiny, especially when organic additive compounds such as gelatin, peptones, sodium sulfite, thiourea, polyalcohol, aldehydes, ketones or salts of organic acids are used.
- organic additive compounds such as gelatin, peptones, sodium sulfite, thiourea, polyalcohol, aldehydes, ketones or salts of organic acids are used.
- Zinc salt alkali metal hydroxide, at least one organic brightener and the reaction product of an unsaturated heterocyclic hydrocarbon compound containing at least two nitrogen atoms with a ring, with an epihalohydrin or with a glycerol halohydrin.
- the baths described therein contain a quaternary pyridine compound, for example N-benzyl-3-methylcarboxylate-pyridinium chloride and nicotinic acid N-oxide, instead of aldehydes.
- US-A 38 56 637 cyanide-free or largely cyanide-free zinc baths are described, containing soluble zinc compounds, a brightener and an alkaline metal silicate to avoid matt, greasy or dirty metal coatings.
- Alkaline amine-epichlorohydrin reaction products for example, are given as gloss agents.
- US Pat. No. 3,869,358 discloses an aqueous alkaline zincate bath which contains less than 15 g of cyanide / liter of solution and additionally a soluble zinc compound and at least one water-soluble compound with tertiary and / or quaternary amine groups, which are obtained by polymerization an aliphatic amine with epihalohyd ⁇ n is produced
- the aforementioned zinc baths can be used to deposit shiny, but not uniformly thick, zinc coatings.
- the present invention is therefore based on the problem of avoiding the disadvantages in the prior art and of finding an aqueous solution for the electrolytic deposition of shiny and bubble-free zinc or zinc alloy coatings, and in particular a uniform layer thickness distribution of the zinc coatings can also be produced on curved surfaces.
- an aqueous alkaline cyanide-free solution for the electrolytic deposition of zinc or zinc alloy coatings at least containing
- the solution can also contain an amine-epichlorohydrin copolymer which can be obtained by reacting epichlorohydrin with compounds selected from the group of the nurses, diamines and triamines.
- Amine-epichlorohydrin copolymers with the general structural formula are particularly suitable
- R 1 and R2 are selected independently of one another and are hydrogen, alkyl, hydroxyalkyl, alkenyl, alkynyl, aralkyl or phenyl,
- diallylammonium sulfur dioxide copolymers and amine-epichlorohydrin copolymers according to the invention are added to the bath as basic additives.
- the thicknesses of zinc or zinc alloys on metal sheets coated in a so-called Hull cell can be determined at different points which have been coated with different current densities.
- the ratio of the thickness of a layer deposited at a high current density (for example 3 A / dm 2 ), to form a layer, deposited at a low current density (for example 0.5 A / dm 2 ), has a high value for conventional bath types. In the case of the specified current densities, this ratio reaches values of at least 3, 4th
- the layers have no veils within a large current density range, no coarsely crystalline coatings are produced, and the adhesion of the layers to the substrate surface is sufficiently high that bubbles and other lift-offs do not form between the layer and the base
- the layers are ductile. Workpieces coated in this way can therefore be processed mechanically without problems, for example by bending.
- the corrosion resistance of the layers is very good both against the formation of so-called white rust, i.e. the layer itself is resistant to corrosion, as well as to red rust, which can occur when coating iron substrates and is caused by corrosion of the substrate.
- the layers are also easy to chromate.
- the one formed on the layers is also easy to chromate.
- Chromating layer adheres well and has a high corrosion resistance. Blue, yellow, green and black chromating layers can be used be generated.
- Another advantage of the bath according to the invention is the high stability of the additive compounds used. The effectiveness of these compounds is not reduced when the bath is idle.
- the bath solution can be used at high temperatures, for example at 35 ° C. to 40 ° C., or at low temperatures, for example room temperature or below.
- suitable choice of the concentration of the additive compounds contained and suitable further compounds both high-gloss and semi-gloss coatings can be produced.
- the current yield in the metal deposition is very high even with zinc contents of 8 g / l to 10 g / l solution.
- the working range is very good with 4 g zinc ions / l to 40 g / l solution, without the formation of burns, and in particular from 5 g / l to 18 g / l solution, with a very good layer thickness distribution in the entire current density range. It is also possible to deposit layers up to 30 ⁇ m thick without the formation of bubbles.
- a coating solution is used in which diallylammonium-sulfur dioxide copolymers with an average molecular weight of 240-10000 g / mol or slightly above and preferably with a molecular weight of 500 g / mol to about 6000 g / Moles are included.
- Diallyldimethylammonium chloride-sulfur dioxide copolymer is particularly well suited as a diallylammonium-sulfur dioxide copolymer.
- the coating solution can also additionally be a homopolymeric compound with the general structural formula
- R 1 and R2 are selected independently of one another and are hydrogen, alkyl, hydroxyalkyl, alkenyl, alkynyl, aralkyl or phenyl and
- diallyldimethylammonium halide and diallyidimethylammonium hydrogen sulfite which is formed in the production of the diallyldimethyiammonium-sulfur dioxide-sulfur dioxide-copolymers from diallyldimhalogenamide from monodimedimhalogenamides from diallyldimethylammonium-sulfur dioxide-copolymers derived from the production of the diallylammonium-sulfur dioxide copolymers and the homopolymeric compounds.
- diallylammonium sulfur dioxide copolymers the homopolymers and the unreacted monomer, for example diallyldimethylammonium chloride, the diallylammonium sulfur dioxide copolymers are present in a proportion of 1
- % By weight to 100% by weight, based on the mixture of the compounds in this group.
- the proportion of homopolymers is 0% by weight to 60% by weight, based on the mixture of the compounds, and the proportion of unreacted monomer is 0% by weight to 70% by weight.
- Typical mixtures of these compounds contain 80% by weight.
- Sulfur dioxide copolymer 5% by weight homopolymer and 15% by weight unreacted monomer or 70% by weight dialiylammonium sulfur dioxide Copolymer, 5% by weight homopolymer and 25% by weight unreacted monomer.
- the reaction solution containing copolymers can also be treated in such a way that the polymers precipitate out as a crystalline solid, in which no free diallyl-dimethylammonium is contained, but only the pure copolymer.
- diallylammonium sulfur dioxide copolymers contain heterocyclic ring structures in a 5-ring system. Only these are suitable for producing the layers with the required uniform layer thickness. Similar diallylammonium sulfur dioxide copolymers, such as, for example, the polyamine sulfones with 6-ring systems described in US Pat. No. 4,134,804, do not have the same advantages on. In particular, it is not possible with these compounds to deposit layers with the required uniformity. In addition, the tendency to form bubbles is markedly reduced compared to the compounds disclosed in the US patent.
- diallylammonium sulfur dioxide copolymers with a 5-ring system are possible by suitable reaction control and substitution of the monomers available in their manufacture.
- these compounds are obtained as a solvent by polymerization in water.
- the choice of the polymerization starter could also have led to the formation of the 6-ring in the US patents.
- ammonium persulfate is used instead of other peroxide initiators, for example di-tert-butyl peroxide or di-benzoyl peroxide, the diallylammonium-sulfur dioxide copolymers according to the invention are formed.
- the formation of the 5-ring systems can easily be detected by nuclear magnetic resonance spectroscopy (NMR).
- NMR nuclear magnetic resonance spectroscopy
- Suitable other anions e.g. B. also nitrates, chlorates, perchlorates and sulfates can be used.
- the amine-epichlorohydrin copolymer contained in the solution preferably has an average molecular weight of more than 500 g / mol and in particular of about 1,500 g / mol.
- the amine-epichlorohydrin copolymers are prepared by known processes by polycondensation, for example of 3-dimethylamino-1-propylamine with epichlorohydrin. Coating solutions with copolymers of nurses, diamines,
- bis-electrophilic compounds such as bis-glycidyl ether, di-haloalkanes and epihalohydrins.
- Particularly suitable is 3-dimethylamino-1-propylamine-epichlorohydrin copolymer as an amine-epichlorohydrin copolymer.
- R 1 and R2 are each methyl groups and X is chloride in the general structural formula II described above.
- the solution can also contain 1-benzyl pyridium 3-carboxylate as a gloss agent to produce a high-gloss zinc or zinc alloy layer.
- carboxylate groups are carboxylates of the lower alkanoic acids, such as acetate.
- Sulfonate betaines such as, for example, N-benzylpy ⁇ dinium sulfonate, are also effective compounds.
- Zinc oxide is usually used as the source of zinc ions, which dissolves in the alkaline coating bath as zincate.
- sources of zinc ions such as zinc salts, can also be used, provided that further antones which enter the bath by adding the zinc salts do not impair the deposition is, for example, zinc sulfate
- zinc alloy layers other metals can be deposited together with zinc.
- the bathers also contain compounds of these metals in addition to the zinc ion source.
- coordinated complexing agent combinations are required in the coating solution in order to control the deposition potentials. Such combinations are known.
- Sodium hydroxide is usually added as an alkalizing agent in a concentration of 50 g / l to 200 g / l solution and in particular from 80 g / l to 150 g / l solution.
- alkali and alkaline earth metal hydroxides and tetraalkylammonium hydroxides are also suitable. However, in the latter
- the coating solutions according to the invention also contain further components which are added to the bath for various purposes.
- the bath can additionally contain sodium carbonate to control and stabilize the pH.
- the bath can also contain sodium gluconate or other complexing agents.
- Aldehydic aromatic compounds such as, for example
- Anisaldehyde can be added to the bath as a brightener. Under certain circumstances, these compounds worsen the layer thickness distribution.
- These compounds are preferably used in the form of their bisulfite adducts in order to increase their solubility in the bath, such as thiourea, mercaptobenzothiazole and mercaptot ⁇ azoles, are added to the bath in order to level the metal precipitate in the low current density range
- the temperature of the bath can be set in a wide range. For example, good results are obtained with temperatures from 15 ° C to 40 ° C
- the current density that can be used is between 0.01 A / dm 2 and 15 A / dm 2 , preferably in the range from 0.1 A / dm 2 to 6 A / dm 2. In this range, shiny, leveled, uniform thicknesses are obtained and get bubble-free coatings
- the cathodic current yield of the bath is between 80% and 95%, based on the amount of metal deposited with pure Zmkuberzug.
- the solution according to the invention can be used both for coating workpieces in the so-called rack technology, in which the workpieces are immersed in the bath, firmly mounted on a rack. Due to the complex assembly technology, however, clamp parts are not metallized using the rack technology, but rather using a drum method in which the parts to be metallized are filled into a drum in the bath solution and metallized in the drum. This procedure is also easily possible with the solution according to the invention. Both soluble zinc anodes and insoluble anodes, for example made of iron, nickel-alloyed iron or titanium, can be used as anodes.
- air can be blown into the coating solution and the solution can be set in vigorous motion in this way.
- the bath was tested by depositing zinc on sheet iron cathodes in a Hull cell at 22 ° C with a total current of 1 A 1 for 5 minutes.
- the layer thickness distribution at different current densities was determined by zinc dissolution at one point on the coated iron sheet, at which zinc was deposited with a current density of 3 A / dm 2 , and at another point, at the zinc with a current density of 0.5 A / dm 2 was determined.
- An index was calculated as a measure, which gives the ratio of the layer thickness deposited at 3 A / dm 2 to the layer thickness deposited at 0.5 A / dm 2 .
- the basic bath was 5 ml / l of a 25% by weight aqueous solution of diallyldimethylammonium chloride-sulfur dioxide copolymer in water and 0.5 ml / l of a 38% by weight aqueous solution of 3-dimethylamino-1-propylamine-epichlorohydrin Copolymer added. Uniformly coated, semi-gloss zinc coatings were obtained. The layer thicknesses at the measuring points were 5.7 ⁇ m (3 A / dm 2 ) and 3.3 ⁇ m (0.5 A / dm 2 ). The index was 1 . 7th
- Example 1 The experiment of Example 1 was repeated. Instead of the compounds diallyldimethylammonium chloride-sulfur dioxide copolymer and 3-dimethylamino-1-propylamine-epichlorohydrin copolymer, other bath additives were used, which are also described in DE 25 25 264 C2 (5 ml of a 35% by weight aqueous solution Solution of imidazole-epichlorohydrin copolymer (IMEP), 1-benzylpyridinium-3-carboxylate, thiourea, anisaldehyde-bisulfite adduct per liter of bath).
- IMEP imidazole-epichlorohydrin copolymer
- 1-benzylpyridinium-3-carboxylate 1-benzylpyridinium-3-carboxylate
- thiourea anisaldehyde-bisulfite adduct per liter of bath.
- the iron sheets were coated with a shiny zinc layer.
- Example 1 The experiment of Example 1 was repeated. In addition, 1-benzyl pyridium 3-carboxylate was added in a concentration of 80 mg / l to the bath solution
- a zinc coating with a uniform layer thickness distribution was obtained in the entire current density range. After the coated sheet had been treated in the tempering furnace at 1 20 ° C. for one hour, the sheets were unchanged and showed no bubbles.
- Example 1 The experiment of Example 1 was repeated. The temperature during the deposition was increased to 30 ° C.
- Example 1 The experiment of Example 1 was repeated in a 5-liter beaker with pure zinc anodes.
- the iron sheet cathodes were bent several times at right angles and were coated with zinc at an average current density of 2 A / dm 2 for one hour. During this time, air was passed through the coating solution.
- the layer thicknesses varied from 25 ⁇ m to 32 ⁇ m.
- the layer was semi-glossy to glossy.
- Example 3 The experiment of Example 3 was repeated. However, an additional 50 mg / l of anisaldehyde bisulfite adduct was added to the coating solution. The coating was carried out at a total current of 1 A in the Hull cell during a coating time of 15 minutes.
- the layer thicknesses were 5.8 ⁇ m (3 A / dm 2 ) and 3.3 ⁇ m (0.5 A / dm 2 ), the index 1, 7. No bubbles were visible even after heating in the oven.
- the zinc layer could be coated without any problems using the yellow chromating bath ZP1 C from Atotech Espa ⁇ a, S.A., which contains hexavalent chromium compounds and inorganic salts and gives an iridescent finish, and did not show any bubbles even after an annealing treatment.
- Example 7 was repeated.
- the concentration of 1-benzylpyridinium-3-carboxylate in the bath was increased to 100 mg / l.
- the coating conditions corresponded to those of Example 7.
- the zinc layer was high-gloss without blistering, even after a tempering treatment.
- the determined layer thickness index was 1.6 to 1.7.
- the galvanized sheet was high-gloss without blistering after a tempering treatment.
- the layer thickness distribution index was 1.6 to 1.7.
- a zinc layer was deposited using a bath according to Example 1. However, instead of 3-dimethylamino-1-propylamine-epichlorohydrin copolymer was one of the compounds
- the layers had a layer thickness distribution similar to that of the layers produced according to Example 1.
- Zinc as zinc oxide 1 0 g
- diallyldimethylammonium chloride-sulfur dioxide copolymers (XP 1 xx) were prepared with varying amounts of sulfur dioxide and initiator (see synthesis example) and used as 25% by weight solutions in water.
- the connections PAS A5 and PAS 92 are products of the company Nitto Boseki
- the coating results are given below using a Hull cell.
- the coating conditions correspond to those of Example 1.
- the values in Table 1 indicate the layer thickness distribution indices.
- Example 11 The same bath composition as in Example 11 was used. However, various compounds and combinations of compounds according to the table below were used as additives (BP3C: 1 - benzylpyridinium-3-carboxylate, IMEP: imidazole-epichlorohydrin copolymer, Verb. II: 3-dimethylamino-1-propylamine-epichlorohydrin- Copolymer).
- BP3C 1 - benzylpyridinium-3-carboxylate
- IMEP imidazole-epichlorohydrin copolymer
- Verb. II 3-dimethylamino-1-propylamine-epichlorohydrin- Copolymer
- a 60% by weight aqueous solution of 1,260 g of diallyldimethylammonium chloride (Aldpch, Germany) was diluted with 540 ml of water. 200 g of sulfur dioxide were slowly passed into this solution at up to 30 ° C. At 28 ° C, 8.7 g of ammonium peroxodisulfate in 43 ml of water were added as an initiator. After 2.5 hours, a further 13 g of ammonium peroxodisulfate, dissolved in 65 ml of water, were added. The mixture was then heated at 70 ° C. for 5 hours.
- a product with an average molecular weight of about 1,400 g / mol in the polymeric portion is obtained.
- the molecular weight was determined by gel permeation chromatography (GPC) with Ultrahydrogel 1 20/250; refractometric determination, Pullulan and Maltooligosaccha ⁇ d standard.
- XP 1 03 85 g of a 60% 9, 1 g 0.4 g in 2 ml 1 6 hours at 67 0C solution with 25 ml water, then water 0.6 in 3 ml water XP 1 05 87 g a 60% 1 3.9 g 0.6 g in 3 ml 1 6 hours at 68 ° C solution water
- the assignment made to a 5-ring system is further supported with regard to the number and position of the signals by matching the measured spectra with calculated spectra.
- the signals for the monomer diallyldimethylammonium chloride and for a poly-diallyldimethylammonium chloride sequence or a diallyldimethylammonium chloride homopolymer were recognizable in the 13 C-NMR spectra.
- the layer thickness ratio is 1.65.
- Example 1 6 was repeated, but diallyldimethylammonium chloride (DADMAC) was added as a 60% by weight solution to 0.2 ml / l.
- DMDMAC diallyldimethylammonium chloride
- Example 1 7 shows that monomers alone can have a strong influence on a layer thickness distribution, so that the additions of 2 and 12 ml / l are still included in the solution according to the invention.
- the version of example 1 7 is the preferred embodiment since glossy and uniform coatings were achieved according to example 1 7, whereas in example 1 8 the result on a Hull cell sheet was worse in that the coating was matt and dark and burns were sometimes noticeable with high monomer additions. There was also a build-up of powdered zinc on the sheet.
- Example 1 9 shows that monomers alone can have a strong influence on a layer thickness distribution, so that the additions of 2 and 12 ml / l are still included in the solution according to the invention.
- the version of example 1 7 is the preferred embodiment since glossy and uniform coatings were achieved according to example 1 7, whereas in example 1 8 the result on a Hull cell sheet was worse in that the coating was matt and dark and burns were sometimes noticeable with high monomer additions. There was also a build-up of powdere
- This example shows the effect of the pure polymer.
- the last coating is considered to be technically satisfactory in the sense of the invention and, as the organic bath matrix, contains only one component, 3-mercaptotriazole, in addition to the claimed polymer XP-104.
- the complexing compounds gluconate or Trilon D are used by the expert for water softening and are not an inherent part of the bathroom matrix
- the bath was tested in the same way as that of Example 1.
- the layer thicknesses at the measuring points were 5.7 to 3.4 ⁇ m.
- the index was 1.7 and the Fe content of the coating was 0.55%.
- Example 20 was repeated as examples 21 and 22, but once with the addition of 50 ppm iron as iron saccharate and once with iron gluconate. The results corresponded to those of Example 20.
- the layer thickness was 6.8 to 5.5 ⁇ m; the index was 1, 2.
- the iron content of the coating was 0.65%.
- the coating is easily chromated within 30 seconds with Tridur Yellow, a bath containing chromium salts from Atotech Espana S.A., to produce a yellow iridescent color.
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- Organic Chemistry (AREA)
- Electroplating And Plating Baths Therefor (AREA)
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96907440A EP0815291B1 (de) | 1995-03-10 | 1996-03-11 | Lösung zum elektrolytischen abscheiden von zink- oder zinklegierungsüberzügen |
JP8527271A JPH11501699A (ja) | 1995-03-10 | 1996-03-11 | 亜鉛又は亜鉛合金被膜の電解析出のための溶液 |
BR9607363A BR9607363A (pt) | 1995-03-10 | 1996-03-11 | Solução para a deposição eletrolítica de revestimentos de zincos ou de ligas de zinco |
DE59601779T DE59601779D1 (de) | 1995-03-10 | 1996-03-11 | Lösung zum elektrolytischen abscheiden von zink- oder zinklegierungsüberzügen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19509713.0 | 1995-03-10 | ||
DE19509713A DE19509713C1 (de) | 1995-03-10 | 1995-03-10 | Lösung zum elektrolytischen Abscheiden von Zink- oder Zinklegierungsüberzügen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996028590A1 true WO1996028590A1 (de) | 1996-09-19 |
Family
ID=7756953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/001048 WO1996028590A1 (de) | 1995-03-10 | 1996-03-11 | Lösung zum elektrolytischen abscheiden von zink- oder zinklegierungsüberzügen |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0815291B1 (de) |
JP (1) | JPH11501699A (de) |
KR (1) | KR19980702896A (de) |
AT (1) | ATE179465T1 (de) |
BR (1) | BR9607363A (de) |
CA (1) | CA2215048A1 (de) |
DE (2) | DE19509713C1 (de) |
ES (1) | ES2132899T3 (de) |
WO (1) | WO1996028590A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6706167B1 (en) | 1999-02-25 | 2004-03-16 | Trevor Pearson | Zinc and zinc alloy electroplating additives and electroplating methods |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19840019C1 (de) * | 1998-09-02 | 2000-03-16 | Atotech Deutschland Gmbh | Wäßriges alkalisches cyanidfreies Bad zur galvanischen Abscheidung von Zink- oder Zinklegierungsüberzügen sowie Verfahren |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US3869358A (en) * | 1972-07-03 | 1975-03-04 | Lea Ronal Inc | Electrolytes for the electrolytic deposition of zinc |
SU1425258A1 (ru) * | 1986-09-05 | 1988-09-23 | Научно-Производственное Объединение По Технологии Машиностроения "Цниитмаш" | Электролит цинковани |
DE3721416A1 (de) * | 1987-06-29 | 1989-01-12 | Dn G Uni Im 300 Letija Vossoed | Verfahren zum galvanischen verzinken von gegenstaenden |
SU1675395A1 (ru) * | 1989-01-24 | 1991-09-07 | Предприятие П/Я М-5288 | Электролит блест щего цинковани |
RU1776702C (ru) * | 1990-04-02 | 1992-11-23 | Институт Химии И Химической Технологии Литовской Академии Наук | Электролит цинковани |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3856637A (en) * | 1973-07-09 | 1974-12-24 | Lea Ronaf Inc | Methods of electroplating zinc and cyanide free or low cyanide zinc plating baths therefor |
JPS51103039A (de) * | 1975-03-08 | 1976-09-11 | Japan Metarufuinitsushingu Kan | |
DE2525264C2 (de) * | 1975-06-04 | 1984-02-16 | Schering AG, 1000 Berlin und 4709 Bergkamen | Alkalisches cyanidfreies Zinkbad und Verfahren zur galvanischen Abscheidung von Zinküberzügen unter Verwendung dieses Bades |
US4134804A (en) * | 1977-08-29 | 1979-01-16 | Enthone, Incorporated | Cyanide-free zinc plating bath and process |
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1995
- 1995-03-10 DE DE19509713A patent/DE19509713C1/de not_active Expired - Fee Related
-
1996
- 1996-03-11 AT AT96907440T patent/ATE179465T1/de not_active IP Right Cessation
- 1996-03-11 JP JP8527271A patent/JPH11501699A/ja active Pending
- 1996-03-11 ES ES96907440T patent/ES2132899T3/es not_active Expired - Lifetime
- 1996-03-11 EP EP96907440A patent/EP0815291B1/de not_active Expired - Lifetime
- 1996-03-11 BR BR9607363A patent/BR9607363A/pt not_active Application Discontinuation
- 1996-03-11 DE DE59601779T patent/DE59601779D1/de not_active Expired - Fee Related
- 1996-03-11 WO PCT/EP1996/001048 patent/WO1996028590A1/de not_active Application Discontinuation
- 1996-03-11 CA CA002215048A patent/CA2215048A1/en not_active Abandoned
- 1996-03-11 KR KR1019970706304A patent/KR19980702896A/ko not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3869358A (en) * | 1972-07-03 | 1975-03-04 | Lea Ronal Inc | Electrolytes for the electrolytic deposition of zinc |
SU1425258A1 (ru) * | 1986-09-05 | 1988-09-23 | Научно-Производственное Объединение По Технологии Машиностроения "Цниитмаш" | Электролит цинковани |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6706167B1 (en) | 1999-02-25 | 2004-03-16 | Trevor Pearson | Zinc and zinc alloy electroplating additives and electroplating methods |
Also Published As
Publication number | Publication date |
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DE59601779D1 (de) | 1999-06-02 |
BR9607363A (pt) | 1997-12-30 |
JPH11501699A (ja) | 1999-02-09 |
KR19980702896A (ko) | 1998-09-05 |
EP0815291A1 (de) | 1998-01-07 |
CA2215048A1 (en) | 1996-09-19 |
ATE179465T1 (de) | 1999-05-15 |
EP0815291B1 (de) | 1999-04-28 |
DE19509713C1 (de) | 1996-08-22 |
ES2132899T3 (es) | 1999-08-16 |
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