SU17967A1 - Electrolytic chrome plating method - Google Patents

Description

Posted in Veshniki Committee on Affairs of izororteny

) 1a1e1aSpoyspluct of electrically synthesized xpc syrvavn in vlevtrolt, which are short of chroic acid solutions with the addition of shock chromium n metals, cd shchenlenlenl, mainly, in the case of crush metal, chromium and chromium metals, noschlenlenla When working with body baths, it is not always necessary to have a water bath that the employee who usually serves as an anode in chrome baths quickly destroys and goes partly into sieges, and partly keeps solution in the complex compound. Saturn condition: to a solution of more than a quarter of quantity has a harmful effect on the structure of the electrolyte structure: the occurrence of chromium, grit, chrome cracking on a thick layer of a thick layer turns out to be impossible. In order to run into it, tfnkhodkv shchmvn ch special measures.

In the described method, atmos dostaaetsya introduction of one at a time by the will of iron, cobalt and lead.

Iron is necessary for uniform deposition of alkaline alehtrolysis. The purpose of cobalt is to give a uniformity to a constant concentration of chromate in solution and to serve as a protection against the oxidation of aaqisic iron in the preparation process of the additive. The latter is performed as follows; a solution of ferrous sulfate iron is mixed into a solution of cobalt in a mixture of cobalt, calculated on metals 1: 5. The concentration of iron iQrnopooa 99 must butb above I css. This solution is slowly poured into a solution of 1f011 "HB01U caustic potassium so that a small part of the iron and cobalt remains in the mouth of the thief. Distilled water should be thoroughly cleaned by oxygen removal. The precipitate mixture soured number 9 for. 1930

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Shalshra Yuzhekheva khobta sozfvekoto even on air, so kAE mHEo zvleva okol utoto in IPK TCTBHK of a large volapesta flakes of cobalt. The precipitate is twisted, washed in 50 ml of hydroxylic acid in 25 cm of sareii water and peanutted in a peoiBOpe in 25 cm of water.

leaeso UOIBO Weesd Drggsh by: precipitate a vacant wedge of iron to the core. In both cases, anhydrous corpuscles of the eyes of a young man, not succor, in chronic acid, can be adjusted. Mock about precipitate water and iron oxides in the cold. Although i3ii is soluble in chrochic acid, io gives the worst result of crying. First, the bistro is oxidized and, therefore, gives a different result, and, secondly, together with cobalt, it gives a very even amount of chromium. This solution is cobalt-chromate iron. serves as an additive to the chromic acid bath.

It is also possible to show a mixture of carbonates or non-diluted oxides. In addition to cobalt and iron, a hydrated oxide oxide is introduced into the bath, which dissolves in an excess of chromic acid, forming orbital salts of cobalt in an excess of cobalt. In its presence, the lead anode is very slightly oxidized and the amount of: acid-acid lead in the bath stabilizes.

The composition of the bath is reconstituted as follows (in g): sulfuric acid beats. weight 1,841,7

sulfuric hrsh0,6

iron 10.5

Uhromat

cobalt} 2.5

svnetsk0,3

chromic acid

This quantity is consumed by 2 liters of chromic acid. The conditions for working with such a bathroom are usual: temperature, current density 4 a / dm. Current output up to 13%. Thickness up to 5 mm is possible. The above results can be obtained by using other salts of iron and cobalt, namely carbonate.

PRIORITY INVENTION

I. The method of electrolytic chromium plating in Alecrolitol, consisting of chromic acid solutions with LDPC xpc% ia and other sulphate and metals: characterized in that lead oxide is added to the electrolyte and a mixture of cobalt chromates is added to the electrolyte and heleas are so close to each other that the weight of the metal cobalt, iron, and blue metal is related to each other as 5: 1: 0.6.

2. iagotovlvov heard a. I dabov orah orek which the robot works in a strong horschock.

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