SU101526A1 - Method of electrochemical cathode blackening of the surface of metal products - Google Patents

Method of electrochemical cathode blackening of the surface of metal products

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Publication number
SU101526A1
SU101526A1 SU450696A SU450696A SU101526A1 SU 101526 A1 SU101526 A1 SU 101526A1 SU 450696 A SU450696 A SU 450696A SU 450696 A SU450696 A SU 450696A SU 101526 A1 SU101526 A1 SU 101526A1
Authority
SU
USSR - Soviet Union
Prior art keywords
blackening
metal products
electrochemical cathode
electrochemical
cathode
Prior art date
Application number
SU450696A
Other languages
Russian (ru)
Inventor
Н.Т. Дробанцева
А.Н. Сысоев
Original Assignee
Н.Т. Дробанцева
А.Н. Сысоев
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Н.Т. Дробанцева, А.Н. Сысоев filed Critical Н.Т. Дробанцева
Priority to SU450696A priority Critical patent/SU101526A1/en
Application granted granted Critical
Publication of SU101526A1 publication Critical patent/SU101526A1/en

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Description

Электрохимические способы чернени  1металлов на катоде с применением хромовых электролитов известны . Эти способы имеют р д недостатков , к которым можно отнести недостаточно черный цвет и узкий предел регулировани  режима чернени .Electrochemical methods of blackening 1 metal at the cathode using chromic electrolytes are known. These methods have a number of drawbacks to which the black color and the narrow limit of the blackening control can be attributed.

Согласно описываемому изобретению поверхность изделий, подлежащих чернению, подвергают -катодной обработке в хромовом электролите с добавкой борфтористоводородной кислоты. При этом состав ванны и режим работы примен ют следующие:According to the described invention, the surface of the products to be blacked is subjected to cathode treatment in a chromic electrolyte with the addition of hydrofluoric acid. The composition of the bath and the operating mode are as follows:

хромовый ангидрид . . . 200-250 г/л борфтористоводородна  кислота 0,65 г/лchromic anhydride. . . 200-250 g / l Hydrofluoric acid 0.65 g / L

плотность тока20-25 а/дмcurrent density 20-25 a / dm

врем  выдержки .... 20-30 мин.holding time .... 20-30 min.

температура 40-50°temperature 40-50 °

Хромовый ангидрид не должен содержать иона сульфата, а это обеспечиваетс  путем добавлени  к раствору хромовой кислоты углекислого бари .Chromic anhydride should not contain sulphate ion, and this is achieved by adding barium carbonate to the chromic acid solution.

Обработанные в таком электролите издели  имеют черное покрытие с надежнымиантикоррозионнымиProducts treated in such an electrolyte have a black coating with reliable anti-corrosion

свойствами, получающеес  при одинаковых услови х обработки на различных металлах: стали, меди и ее сплавах, электролитическом хроме и других металлах, кроме алюмини .properties that are obtained under the same processing conditions on various metals: steel, copper and its alloys, electrolytic chrome and other metals, except aluminum.

что упрощает технологию электрохимического чернени .which simplifies the technology of electrochemical blackening.

Подготовка изделий перед чернением производитс  так, как и перед гальваническим покрытием. После чернени  издели  промывают, сушат и смазывают маслом.Preparation of products before blackening is carried out as before electroplating. After blackening, the product is washed, dried and oiled.

Дл  получени  более глубокого черного цвета издели  до операции промасливапи  рекомендуетс  подвергать дополнительной обработке путем последовательного погружени  в 10%-иый раствор уксуснокислого кобальта и в 2,5%-ный раствор марганцевокислого кали  с последующей промывкой, суп1кой и промасливанием .To obtain a deeper black color of the product prior to the oiling operation, it is recommended to subject it to additional processing by successively immersing in a 10% solution of cobalt acetic acid and in a 2.5% solution of potassium manganate and subsequent washing, suctioning and oiling.

Предмет изобретени Subject invention

Способ электрохимического катодного чернени  поверхности металлических изделий с Применением в качестве электролита раствора хромового ангидрида, отличающийс  тем, что, с целью получени  черного покрыти  на р де металлов, преимущественно на стали, меди, медных сплавах, электролитическом хроме, в одном и том же электролите и при одинаковом режиме, в хромовый электролит, освобожденный от аниона серной кислоты добавл ют борфтористоводородную кислоту R копдентрании 0,65 г(л.The method of electrochemical cathode blackening of the surface of metal products with the use of chromic anhydride solution as an electrolyte, characterized in that, in order to obtain a black coating on a number of metals, mainly steel, copper, copper alloys, electrolytic chromium, in the same electrolyte and in the same mode, hydrofluoric acid R is added to a chromic electrolyte freed from sulfuric acid anion at a concentration of 0.65 g (l.

SU450696A 1954-07-05 1954-07-05 Method of electrochemical cathode blackening of the surface of metal products SU101526A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU450696A SU101526A1 (en) 1954-07-05 1954-07-05 Method of electrochemical cathode blackening of the surface of metal products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU450696A SU101526A1 (en) 1954-07-05 1954-07-05 Method of electrochemical cathode blackening of the surface of metal products

Related Child Applications (1)

Application Number Title Priority Date Filing Date
SU1688895A Addition SU460983A2 (en) 1971-08-24 1971-08-24 Mechanism for discrete transmission

Publications (1)

Publication Number Publication Date
SU101526A1 true SU101526A1 (en) 1954-11-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU450696A SU101526A1 (en) 1954-07-05 1954-07-05 Method of electrochemical cathode blackening of the surface of metal products

Country Status (1)

Country Link
SU (1) SU101526A1 (en)

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