Verfahren zur elektrolytischen Herstellung hochglaenzender Nickelueberzuege

747,908. Electrodeposition of nickel. HANSON-VAN WINKLE-MUNNING CO. Aug. 7, 1953 [March 24, 1953], No. 21895/53. Class 41. A process for electrodepositing nickel from an aqueous acidic solution of at least one nickel salt, is characterized in that there is dissolved in the solution from 0.02 to 3 grams per litre of a water-soluble acetylenic compound. Preferred acetylenic compounds have the general formula where R 1 is a hydroxyl, hydroxymethyl or hydroxyethyl radical,R 2 is a hydrogen or methyl radical, and R 3 is a methyl, hydroxymethyl, hydroxyethyl, methoxymethyl, diethylamino-methyl, morpholinomethyl, or hydroxypropyne radical. Examples of acetylenic compounds are 2 - butyne - 1, 4 - diol, 4- methoxy - 2 - butyne - 1 - ol, 3 - hexyne - 2,5- diol, 4 - diethylamino - 2 - butyne - 1 - ol, 4- (N - morpholinyl) - 2 - butyne - 1 - ol, 3 - pentyne - 1 - ol, 2,4 - hexadiyne - 1,6 - diol, and 1- diethylamino - 2 - propyne. A table of acetylenic compounds is given. Preferably, the solution also contains “ to 80 grams per litre of a water-soluble sulpho-oxygen compound consisting of unsaturated aliphatic sulphonic acids, mononuclear and binuclear aromatic sulphonic acids, heterocyclic sulphonic acids, mononuclear aromatic sulphinic acids, alkali metal, ammonium, magnesium or nickel salts of said acids, and mononuclear aromatic sulphonamides and sulphonimides. Examples are naphthalene trisulphonic acid, benzene sodium sulphonate and meta-benzene disodium sulphonate. A table of sulpho-oxygen compounds is given. The nickel salt may be nickel sulphate, chloride, formate, fluoborate or sulphamate. The solution may also contain sodium chloride or bromide, and boric acid.