SU370272A1 - ALL-UNION I E.E. Kravtsov, | G. I. Mezhenin and Sh. G. Pilavov | PDTP | TNO- ^ 1 [XIII '; GCD' - Google Patents

Description

one

The invention relates to a coating of gambling, m, in particular to the electrochemical deposition of an alloy of silver - antimony.

There is a known method of electrocrytic precipitated and refined silver - antimony from an electrolyte, containing silver salt, citrate an antimonium potassium, and segate salt.

However, according to a known method, the deposition rate of the NshAl alloy.

To obtain high-quality silver-antimony alloy precipitation with increased current densities, H, N-di (p-perhydrahydrazide) benzenesulfamide, ety lendiamine, ammonium nitrate are added to electrolytes;

Nitrogen Silver Silver 25-35

Ammonium nitrate80-100

iBiHiHHOK NS ls and en T1ImO1N il to a LIA -1, 5

Segnetov salt15-20

Ethylenediamia (50% solution) 30-40

M, N-dig (P - proionshdrazide) benzenesuthamine - 0.2-0.4 and the process is carried out at 18-25 ° C, pH 8-9, cathode current density 0.4-1.0 a / dm. -athod-1me or brass, preceded by the metal a.M1algami1, the anode is silver.

The electrolyte is prepared as follows.

25-35 g of lead nitrate acid are dissolved in 100-150 ml of water, 80-100 g of nitrate aaiMoini are dissolved in 150-200 ml of water. The prepared solutions are poured off and 28-38 g of 50% ethylenediamine p-solution are added with stirring. In a separate portion of water, aggravated to 40-60 ° C (200-300 ml), first g of segnetoic SALT are dissolved, and then 1-1.5 g of tartaric antimoiyl-alkali. The solution is cooled to room temperature and then poured into a solution containing silver.

In 100-150 ml of water, 2 g of a 50% ethylenediamine solution are introduced. then 0.2-0.4 g, N-di (p-propionhydrazide) benzenesulfamide, is dissolved. The solution is drained from the main and adjusted to the required volume.

According to this method, on products, for example, from copper or brass, dense finely crystalline, well-drawn crystals are precipitated: prisoners with a base of sediment of the ceipe6po.-sury.ma alloy.

Subject invention

25

The method of electrochemical deposition of silver-antimony alloy from an electrolyte containing silver salt, potassium tartaric acid, segate salt, characterized in that, in order to improve the quality of the coating, N, .N-NoH (p-ropoin iOiHpi) are introduced into the electrolyte ; Drazid) β1nzolsulfa: m d, ethylenediamine-a.min, ammonium nitrate, with a co-toxic ratio, g / l: Silver Nitrate 25-355 AaoTiHsil.n 80-100; silver | : 1,5 4 Seshnetov salt 15-20 of Ethylenediamine (50% solution) 30-40 N, N-flK (ij3-protio Ngi1draz1Id) be "-sol sulfamide -0.2-0.4 and process at 18–25 ° С, the current density of the current is 0.4–1.0 a / ai2.