SU461157A1 - Brilliant cadmium electrolyte - Google Patents

Description

This invention relates to electroplating.

The brilliant cadmium electrolyte is known, containing cadmium sulfate, sodium sulfate, sulfuric acid, gelatin, and a phenol derivative as a surfactant.

The proposed electrolyte differs from the known one in that p-aminophenol is used as a phenol derivative at a certain ratio of components.

This contributes to the intensification of the process.

The proposed electrolyte contains, g / l:

Cadmium sulfate30-70

Sulfuric acid35-60 Sulfuric acid

(sp. weight 1,84) 35-50 Gelatin2-7

-aminophenol0,3-1,2.

The deposition process is carried out at 18–30 ° C, a cathode density of 2–6 A / dm, and a pressure of 15–15 volts. The current output from this electrolyte is 83%, the deposition rate is 1.34 µm / min.

From the proposed solution, non-porous, shiny with low internal voltage coatings with a microhardness of 80-90 kg / mm2 are obtained.

Example 1. Electrodeposition of brilliant cadmium is carried out from electrolyte, soda | ryaschiy, g / l:

thirty

Cadmium sulfate

40 Sodium Sulphate

35 Sulfuric acid

3 L elatin / g-aminophenol

0.3

at 18 ° C and a cathode current density of 4 a / dm.

The resulting coating has satisfactory adhesion, decorative appearance and microhardness of 81 kg / mm.

Example 2. Electrodeposition of cadmium is carried out from an electrolyte containing 1 g / l:

Cadmium sulfate50

Sodium sulfate 50

Sulfuric acid40

Gelatin5

p-aminophenol 0,9

at current density 4 and 6 20 ° С.

The coating has good adhesion to the substrate and a microhardness of 83 kg / mm.

The electrolyte is prepared by successive dissolution of cadmium sulfate and sodium sulfate in distilled water, then sulfuric acid is added and ha-aminophenol, dissolved in a separate container, is added.

. The gelatin is soaked in cold water until it swells, then heated until completely dissolved and drained into the working bath. The electrolyte is brought to the required level with distilled water and mixed thoroughly. The prepared solution does not require elaboration under the current and can be eRaZU used for its intended purpose. The subject of the invention is electrolytic brilliant cadmium, co-10 containing cadmium sulfate, sodium sulfate, sulfuric acid, gelatin, and a phenol derivative as a surfactant, characterized in that, in order to intensify the process, phenol derivative is used / g-aminophenol in the following ratio of components, g / l: Sulfur gum cadmium 30-70 Sodium sulfate 35-60 Sulfuric acid (sp. weight 1.84) 35-50 Gelatin 2-7 p-aminophenol 0,3- 1.2.