SU395515A1 - - Google Patents

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Publication number
SU395515A1
SU395515A1 SU1438345A SU1438345A SU395515A1 SU 395515 A1 SU395515 A1 SU 395515A1 SU 1438345 A SU1438345 A SU 1438345A SU 1438345 A SU1438345 A SU 1438345A SU 395515 A1 SU395515 A1 SU 395515A1
Authority
SU
USSR - Soviet Union
Prior art keywords
sodium
stainless steels
etching
solution
sodium chloride
Prior art date
Application number
SU1438345A
Other languages
Russian (ru)
Original Assignee
А. А. Худеньких, Л. В. Попова , П. П. Евстафьев
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 А. А. Худеньких, Л. В. Попова , П. П. Евстафьев filed Critical А. А. Худеньких, Л. В. Попова , П. П. Евстафьев
Priority to SU1438345A priority Critical patent/SU395515A1/ru
Application granted granted Critical
Publication of SU395515A1 publication Critical patent/SU395515A1/ru

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  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • ing And Chemical Polishing (AREA)

Description

СПОСОБ БЕСКОНТАКТНОГО ЭЛЕКТРОЛИТИЧЕСКОГО ТРАВЛЕНИЯ НЕРЖАВЕЮЩИХ СТАЛЕЙMETHOD OF CONTACTLESS ELECTROLYTIC PASSING IN STAINLESS STEELS

Изобретение касаетс  электролитической обработки . Известен способ бесконтактного электролитического травлени  нержавеющих сталей в растворе, содержащем сернокислый натрий. | Предложенный способ отличаетс  тем, что с целью интенсификации процесса травлени  В раствор ВВОДЯТ хлористый натрий при следующем соотношении компонентов, вес. %: Сернокислый натрий10-20 Хлористый натрий1 -10. Процесс ведут при 50-80°С И плотности тока 3-40 а/дм. Перед травлением нержавеющие стали обрабатывают в расплаве, содержащем, вес. %: Едкий натр65-80 Азотнюкислый натрий15-35 Хлористый натрий2-7. Процесс ведут при 420-550°С. После бесконтактного электролитического травлени  провод т пассивацию или отбеливание В растворе, содержащем 8-10% азотной кислоты и 2-4% плавиковой кислоты или 8-10% азотной кислоты и 2-6% фтористого аммони , или в 8-10%-ном растворе азотной кислоты при температуре 40-60°С. По предложенному способу получают качественную поверхность, причем общее врем  травлени  дл  гор чекатанных нержавеющих сталей сокращаетс  в 2-4 раза. Предмет изобретени  Способ бесконтактного электролитического травлени  нержавеющих сталей в растворе, содержащем сернокислый натрий, отличающийс  тем, что, с целью интенсификации процесса травлени , в раствор ввод т хлористый натрий при следующем соотнощении компонентов , вес. %: Сернокислый натрий10-20 Хлористый натрий1 -10 Водаостальное и процесс ведут при 50-80°С, плотности тока 3-40 а/дм.The invention relates to electrolytic processing. There is a method of contactless electrolytic etching of stainless steels in a solution containing sodium sulphate. | The proposed method is characterized in that in order to intensify the etching process, sodium chloride is injected into the solution in the following ratio of components, weight. %: Sodium sulfate 10-20 Sodium chloride 1-10. The process is conducted at 50-80 ° C. And the current density of 3-40 a / dm. Before etching, stainless steels are treated in a melt containing, by weight. %: Caustic soda 65-80 Sodium nitrate15-35 Sodium chloride2-7. The process is carried out at 420-550 ° C. After contactless electrolytic etching, passivation or bleaching is carried out In a solution containing 8-10% nitric acid and 2-4% hydrofluoric acid or 8-10% nitric acid and 2-6% ammonium fluoride, or in an 8-10% solution nitric acid at a temperature of 40-60 ° C. According to the proposed method, a high-quality surface is obtained, and the total pickling time for hot-rolled stainless steels is reduced by 2-4 times. The subject of the invention is a method of non-contact electrolytic etching of stainless steels in a solution containing sodium sulfate, characterized in that, in order to intensify the etching process, sodium chloride is added to the solution at the following ratio of components, weight. %: Sodium sulfate 10-20 Sodium chloride -10 Water-void and the process is carried out at 50-80 ° C, current density of 3-40 a / dm.

SU1438345A 1970-05-04 1970-05-04 SU395515A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1438345A SU395515A1 (en) 1970-05-04 1970-05-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1438345A SU395515A1 (en) 1970-05-04 1970-05-04

Publications (1)

Publication Number Publication Date
SU395515A1 true SU395515A1 (en) 1973-08-28

Family

ID=20452946

Family Applications (1)

Application Number Title Priority Date Filing Date
SU1438345A SU395515A1 (en) 1970-05-04 1970-05-04

Country Status (1)

Country Link
SU (1) SU395515A1 (en)

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