DE1239905B - Cyanide electroplating silver bath - Google Patents
Cyanide electroplating silver bathInfo
- Publication number
- DE1239905B DE1239905B DE1962SC030803 DESC030803A DE1239905B DE 1239905 B DE1239905 B DE 1239905B DE 1962SC030803 DE1962SC030803 DE 1962SC030803 DE SC030803 A DESC030803 A DE SC030803A DE 1239905 B DE1239905 B DE 1239905B
- Authority
- DE
- Germany
- Prior art keywords
- bath
- silver
- baths
- cyanide
- antimony
- Prior art date
- 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.)
- Pending
Links
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims description 12
- 229910052709 silver Inorganic materials 0.000 title claims description 12
- 239000004332 silver Substances 0.000 title claims description 12
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 title claims description 4
- 238000009713 electroplating Methods 0.000 title description 2
- 239000007859 condensation product Substances 0.000 claims description 9
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical class C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 claims description 8
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 6
- 150000001299 aldehydes Chemical class 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229940058905 antimony compound for treatment of leishmaniasis and trypanosomiasis Drugs 0.000 claims description 2
- 150000001463 antimony compounds Chemical class 0.000 claims description 2
- 230000008021 deposition Effects 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims 1
- 229910052787 antimony Inorganic materials 0.000 description 9
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 9
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 239000000080 wetting agent Substances 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- HKSGQTYSSZOJOA-UHFFFAOYSA-N potassium argentocyanide Chemical compound [K+].[Ag+].N#[C-].N#[C-] HKSGQTYSSZOJOA-UHFFFAOYSA-N 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- JMVRYCYAKSQJPJ-UHFFFAOYSA-N [K].[Ag] Chemical compound [K].[Ag] JMVRYCYAKSQJPJ-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- -1 polyoxy Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- LFAGQMCIGQNPJG-UHFFFAOYSA-N silver cyanide Chemical compound [Ag+].N#[C-] LFAGQMCIGQNPJG-UHFFFAOYSA-N 0.000 description 1
- 125000001273 sulfonato group Chemical group [O-]S(*)(=O)=O 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
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
- C25D3/46—Electroplating: Baths therefor from solutions of silver
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Description
Cyanidisches galvanisches Silberbad Die Erfindung bezieht sich auf ein cyanidisches Bad zur galvanischen Abscheidung hochglänzender, bl spiegelähnlicher Silberiiberzüge mit hoher bleibender Härte aus komplexe Antimonverbindungen enthaltenden Silberbädern.Cyanide electroplating silver bath The invention relates to a cyanide bath for the galvanic deposition of high-gloss, mirror-like bl Silver coatings with high permanent hardness made from complex antimony compounds Silver baths.
Es ist bereits bekannt, cyanidischen Silberbädern Antimon als Glanz- oder Härtebildner für galvanisch abzuscheidende Silberüberzüge zuzusetzen. Um das Antimon in den alkalischen Bädern in Lösung zu halten, wird es meist als Komplexverbindung zugegeben. Als Komplexbildner sind beispielsweise Oxy- oder Aminosäuren, geradkettio"e aliphatische Polyoxyverbindungen oder Triäthanolamin bekanntgeworden.It is already known to use antimony in cyanide silver baths as a luster or add hardeners for silver coatings to be electrodeposited. To that To keep antimony in solution in alkaline baths, it is mostly used as a complex compound admitted. Complexing agents are, for example, oxy or amino acids, straight chains aliphatic polyoxy compounds or triethanolamine became known.
Alle diese Antimonkomplexverbindungen geben jedoch als Badzusatz allein keinen schleierfreien Hochglanz. Den Bädern müssen daher noch zusätzlich ein oder mehrere Netzmittel, z.-B. Sulfonate, Sulfate in organischer Bindung, Fettsäurekondensationsprodukte oder kondensierte Eiweißabbauprodukte zugegeben werden, um hochglänzende Abscheidungen zu erhalten.However, all of these antimony complex compounds give as a bath additive alone no haze-free high gloss. The bathrooms must therefore also have an or several wetting agents, e.g. Sulphonates, sulphates in organic bonds, fatty acid condensation products or condensed protein breakdown products are added to create high-gloss deposits to obtain.
Netzmittel enthaltende Bäder haben den Nachteil, daß sie bei der Badbewegung zur Erhöhung der Stromdichte, beim Umfüllen, Filtrieren usw. leicht zur Schaumbildung neigen. Außerdem zeigen einige der an sich zur Erhöhung des Glanzes geeigneten Netzmittel den Nachteil, daß sich die Bäder nach einiger Zeit trüben und eventuell Zersetzungsprodukte ausscheiden.Baths containing wetting agents have the disadvantage that they are affected by the movement of the bath to increase the current density, when decanting, filtering etc. easy to foam tend. In addition, show some of the wetting agents which are suitable per se for increasing the gloss the disadvantage that the baths become cloudy after a while and possibly decomposition products retire.
Es ist daher das Ziel der Erfindung, ein Bad zu schaffen, welches die beschriebenen Nachteile nicht zeigt. Erfindungsgemäß wird dieses Ziel dadurch erreicht, daß den cyanidischen Glanzsilberbädern Kondensationsprodukte aus Naphthalinsulfosäuren und Aldehyden in Mengen von 0,05 g/1 bis zur Grenze der Löslichkeit im Bad zugesetzt werden.It is therefore the aim of the invention to create a bath which does not show the disadvantages described. According to the invention, this object is achieved by adding condensation products of naphthalenesulfonic acids and aldehydes in quantities of 0.05 g / l up to the limit of solubility in the bath to the cyanidic bright silver baths.
Zweckmäßigerweise wird ein Kondensationsprodukt aus Naphthalinmonosulfosäure mit 1 Mol Formaldehyd verwendet. Der Glanz der mit derartigen Bädern erzeugten Niederschläge ist so gut, daß keine Nachpolitur mehr nötig ist.A condensation product of naphthalene monosulfonic acid with 1 mol of formaldehyde is expediently used. The shine of the deposits produced with such baths is so good that polishing is no longer necessary.
Gegenüber den Netzmitteln bringen die erfindungsgemäßen Zusätze zu Antimon enthaltenden Silberbädern den Vorteil, daß man diese Bäder zur gelegentlichen Reinigung über Aktivkohle flltrieren kann, ohne daß dabei der Gehalt an Wirkstoffen merklich verändert wird. Die durch den Antimongehalt der Bäder bedingte hohe, auch bei längerem Erwärmen auf Temperaturen von 250 bis 3001 C konstant bleibende Härte der Niederschläge von 150 bis 170 kg/nIM2 (nach Vickers) bleibt bei dem Zusatz von Kondensationsprodukten aus Naphthalinsulfosäuren und Aldehyden zu den Bädern voll erhalten.Compared to the wetting agents, the additives according to the invention to antimony-containing silver baths have the advantage that these baths can be filtered over activated charcoal for occasional cleaning without the active ingredient content being noticeably changed. The high hardness of the precipitates of 150 to 170 kg / nIM2 (according to Vickers) due to the antimony content of the baths, which remains constant even after prolonged heating to temperatures of 250 to 3001 C, remains full when condensation products of naphthalene sulfonic acids and aldehydes are added to the baths obtain.
Zur Erläuterung der erfindungsgemäßen Bäder werden im folgenden einige Beispiele für besonders geeignete Badzusanuriensetzungen 0 annt.To explain the baths of the invention some examples of particularly suitable annt Badzusanuriensetzungen 0 below.
el en Beispiel 1 30g/1 Silber als Kaliumsilbercyanid, 100 g/1 Kaliumeyanid, 1 g/1 Antimon als Triäthanolaminkomplex, 20 g/1 Kaliumcarbonat, 2 gl Kondensationsprodukt aus Naphthalinmonosulfosäure mit 1 Mol Formaldehyd, Stromdichte 0,6 bis 2,5 A/dm2, Temperatur 15 bis 401 C. el en Example 1 30g / 1 silver as potassium silver cyanide, 100 g / 1 potassium eyanide, 1 g / 1 antimony as triethanolamine complex, 20 g / 1 potassium carbonate, 2 gl condensation product of naphthalene monosulfonic acid with 1 mol of formaldehyde, current density 0.6 to 2.5 A. / dm2, temperature 15 to 401 C.
Beispiel 2 40 g/1 Silber als Kaliumsilbercyanid, 150 g/1 Kaliumeyanid, 30 g/1 Kaliumearbonat, 1,5 g/1 Antimon als Glyzerinkomplex, 40 g/l- Glyzerin, 3 g/1 Kondensationsprodukt aus Naphthalinmonosulfosäure mit 1 Mol Formaldehyd, Stromdichte 0,5 bis 3,5 A/dm2, Temperatur 15 bis 40' C. Beispiel 3 35 g/1 Silber als Kaliumsilbereyanid, 105 gd Kaliumeyanid, 20 g/1 Kaliumcarbonat, 0,8 g/1 Antimon als Komplex mit Hexaoxycyclohexan, 10 g/1 Hexaoxycyclohexan, 2 g/1 Kondensationsprodukt aus Naphthalinmonosulfosäure mit 1 Mol Formaldehyd, Stromdichte 0,5 bis 3 A/dm2, Temperatur 15 bis 401 C. Die Stromausbeute beträgt bei allen Beispielen anodisch und kathodisch 1000/e.Example 2 40 g / 1 silver as potassium silver cyanide, 150 g / 1 potassium eyanide, 30 g / 1 potassium carbonate, 1.5 g / 1 antimony as glycerine complex, 40 g / l glycerine, 3 g / 1 condensation product of naphthalene monosulfonic acid with 1 mol formaldehyde , Current density 0.5 to 3.5 A / dm2, temperature 15 to 40 ° C. Example 3 35 g / 1 silver as potassium silver anide, 105 gd potassium yanide, 20 g / 1 potassium carbonate, 0.8 g / 1 antimony as a complex with Hexaoxycyclohexane, 10 g / 1 hexaoxycyclohexane, 2 g / 1 condensation product of naphthalene monosulfonic acid with 1 mole of formaldehyde, current density 0.5 to 3 A / dm2, temperature 15 to 401 C. The current yield in all examples is anodic and cathodic 1000 / e.
Eine Erhöhung der Temperatur oder Erhöhung des Antimongehaltes der Bäder erlaubt die Anwendung höherer Stromdichten. Dabei wird der Glanzstreubereich jedoch nur nach höheren Werten verschoben und nicht ausgeweitet. So liegt der Glanzstreubereich bei Beispie12 bei 20'C zwischen 0,6 und 2,2A/dm% bei 30'C jedoch bereits zwischen 1,2 und 2,8 A/dm2.An increase in the temperature or an increase in the antimony content of the baths allows higher current densities to be used. In doing so, however, the gloss scatter area is only shifted towards higher values and not expanded. For example, the gloss scatter range for example 12 at 20 ° C is between 0.6 and 2.2 A / dm% at 30 ° C, but already between 1.2 and 2.8 A / dm2.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1962SC030803 DE1239905B (en) | 1962-01-09 | 1962-01-09 | Cyanide electroplating silver bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1962SC030803 DE1239905B (en) | 1962-01-09 | 1962-01-09 | Cyanide electroplating silver bath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1239905B true DE1239905B (en) | 1967-05-03 |
Family
ID=7431872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1962SC030803 Pending DE1239905B (en) | 1962-01-09 | 1962-01-09 | Cyanide electroplating silver bath |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1239905B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1771856B1 (en) * | 1967-07-21 | 1971-09-30 | Parker Ste Continentale | GALVANIC SILVER BATH |
| DE3132101A1 (en) * | 1980-08-22 | 1982-06-03 | Giljarijus-Vitautas Kaunas Čechanavičjus | Process for pretreating the surface of metals or alloys thereof, not wettable by mercury, before amalgamation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1140425B (en) * | 1961-05-19 | 1962-11-29 | Schering Ag | Alkaline reacting complex baths for the galvanic deposition of silver coatings |
-
1962
- 1962-01-09 DE DE1962SC030803 patent/DE1239905B/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1140425B (en) * | 1961-05-19 | 1962-11-29 | Schering Ag | Alkaline reacting complex baths for the galvanic deposition of silver coatings |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1771856B1 (en) * | 1967-07-21 | 1971-09-30 | Parker Ste Continentale | GALVANIC SILVER BATH |
| DE3132101A1 (en) * | 1980-08-22 | 1982-06-03 | Giljarijus-Vitautas Kaunas Čechanavičjus | Process for pretreating the surface of metals or alloys thereof, not wettable by mercury, before amalgamation |
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