Gold plating bath and process
阅读：827发布：2022-11-28
专利汇可以提供Gold plating bath and process专利检索，专利查询，专利分析的服务。并且The specification relates to an improved electrolyte. The specification relates also to the use of this electrolyte to deposit gold on a surface. The electrolyte has an alkali gold cyanide, a weak Lewis acid, a weak polyfunctional water-soluble aliphatic acid, a non-depositing metallic compound, a metallic hardener, and water.，下面是Gold plating bath and process专利的具体信息内容。
1. AN ACID ELECTROLYTIC BATH COMPRISING: A. AN ALKALI GOLD CYANIDE IN AN AMOUNT RANGING FROM 0.1 TO 50 GRAMS PER LITER, B. A WEAK LEWIS ACID IN AN AMOUNT RANGING FROM 5 TO250 GRAMS PER LITER AND SELECTED FROM THE GROUP CONSISTING OF A QUINONE, BORIC ACID, PHTHALIC ACID, POTASSIUM ACID PHTHALATE AND MIXTURES THEREOF, C. A WEAK POLYFUNCTIONAL WATER-SOLUBLE ALIPHATIC CARBOXYLIC ACID IN AN AMOUNT RANGING FROM 5 TO 500 GRAMS PER LITER, D. A NON-DPOSITING METALLIC COMPOUND IN AN AMOUNT RANGING FROM 5 TO 250 GRAMS GRAMS PER LITER, E. A METALLIC HARDENER IN AN AMOUNT RANGING FROM 0.01 TO 15 GRAMS OF METAL ION PER LITER, AND F. WATER.
2. The electrolytic bath according to claim 1 in which the alkali gold cyanide is selected from the group consisting of potassium gold cyanide, sodium gold cyanide and ammonium gold cyanide.
2. a weak Lewis acid in an amount ranging from 5 to 250 grams per liter and selected from the group consisting of a quinone, boric acid, phthalic acid, potassium acid phthalate and mixtures thereof,
3. The electrolytic bath according to claim 1 in which the weak polyfunctional water-soluble aliphatic carboxylic acid is selected from the group consisting of itaconic acid, citraconic acid, gluconic acid, glutaric acid, glycolic acid, citric acid, kojic acid, malic acid, succinic acid, lactic acid, tartaric acid and mixtures thereof.
3. a weak polyfunctional water-soluble aliphatic carboxylic acid in an amount ranging from 5 to 500 grams per liter,
4. a non-depositing metallic compound in an amount ranging from 5 to 250 grams per liter,
4. The electrolytic bath according to claim 1 in which the non-depositing metallic compound is selected from the group consisting of an oxide, a carbonate, an acetate, a citrate, a borate, a sulfate, and mixtures thereof; said metal being selected from the group consisting of aluminum, barium, beryllium, magnesium, rubidium, lithium, strontium, and mixtures thereof.
5. The electrolytic bath according to claim 1 in which the metallic hardener is selected from the group consisting of a sulfate, a sulfamate, a chloride, a formate, an acetate, a citrate, a glycolate, a lactate, a tartrate, a fluoborate, a borate, a phosophate, an itaconate, a malate, a gluconate, an oxalate and mixtures thereof; said metal being selected from the group consisting of cobalt, nickel, cadmium, silver, copper, iron, platinum, palladium, indium, manganese, osmium, ruthenium, antimony, lead, zinc and mixtures thereof.
5. a metallic hardener in an amount ranging from 0.01 to 15 grams of metal ion per liter, and
6. water; and b. passing an electric current between an anode and said conductive article as a cathode.
6. The electrolytic bath according to claim 1 which further contains glycine in an amount ranging from about 5 to 20 grams per liter.
7. The electrolytic bath according to claim 1 which further contains hexasodium salt of triethylene tetramine hexaacetic acid in an amount ranging from about 0.25 to 20 grams per liter.
8. The electrolytic bath according to claim 1 which further contains sodium alpha glucoheptonate dihydrate in an amount ranging from about 0.25 to 30 grams per liter.
9. A process for electrodeposition of gold on the surface of a conductive article which comprises: a. immersing the article in an acidic electrolytic bath containing
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