| 摘要 |
electroplating, more particularly applying nickel coatings from pyrophosphate electrodes in machine building and instrument making. SUBSTANCE: electrolyte comprises, g; nickel sulfate, 40-60; potassium pyrophosphate, 160-200; ammonium chloride, 3-5; borax, 3,5;2,4- dinitrophenyl hydrazine, 1.3 mmol/l; red methyl, 1.5 mmole/l; and water, up to 1 l. EFFECT: pore-free nickel coatings within wide range of current densities at maximum hydrogen absorption of steel substrate. 2 cl, 2 ex, 3 tbl
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