SU101315A1 - Oxide film removal bath - Google Patents
Oxide film removal bathInfo
- Publication number
- SU101315A1 SU101315A1 SU450494A SU450494A SU101315A1 SU 101315 A1 SU101315 A1 SU 101315A1 SU 450494 A SU450494 A SU 450494A SU 450494 A SU450494 A SU 450494A SU 101315 A1 SU101315 A1 SU 101315A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- bath
- sodium
- oxide film
- film removal
- products
- Prior art date
Links
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
Предметом изобретени вл етс состав ванны дл удалени оксидной пленки с изделий из магниевых сплавов .The subject invention is a bath composition for removing an oxide film from magnesium alloy products.
Известны способы химической и электрохимической обработки металлов с их промывкой в холодной и гор чей воде и сушкой после химической обработки. Известен также способ травлени магниевых сплавов в растворе хромового ангидрида и способ обработки алюминиевого сплава кип щим раствором кремнефтористого натри со щелочью.Methods are known for chemical and electrochemical treatment of metals with their washing in cold and hot water and drying after chemical treatment. A method of etching magnesium alloys in a solution of chromic anhydride and a method of treating an aluminum alloy with a boiling solution of sodium fluorosilicate with alkali are also known.
Описываемый способ отличаетс от известных тем, что дл удалени защитной пленки с деталей из магниевых сплавов примен етс ванна из едкого натри , азотнокислого натри и азотистокислого натри , а дл последуюндего нанесени на детали защитной пленки со стабильным электросопротивлением - обработка сплава в растворе хромового ангидрида .The described method differs from those known in that a bath of sodium hydroxide, sodium nitrate and sodium nitrite is used to remove the protective film from parts of magnesium alloys, and for the subsequent application of a protective film with a stable electrical resistance to parts, the treatment of the alloy in chromic anhydride solution.
Способ осуществл етс по следующей технологической схеме: детали обтираютс ветошью или концами дл удалени загр знени и затем трав тс 5-50 сек. в кип щем растворе из 550 г1л едкого натри , 40- 70 азотнокислого натри и 170-250 г/л азотистокислого натри .The method is carried out according to the following technological scheme: the parts are wiped with a rag or ends to remove contamination and then etched for 5-50 seconds. in a boiling solution of 550 g1 l sodium hydroxide, 40- 70 sodium nitrate and 170-250 g / l sodium nitrite.
Далее следует промывка i5 холодной воде.This is followed by rinsing i5 with cold water.
С целью получени на поверхности детали новой пленки, имеющей равномерный матовый оттенок и обладающей стабильным и незначительным по величине контактным сопротивлением (15-100 мком), детали трав тс в течение 2-20 мин. в растворе 140-220 хромового ангидрида , имеющего комнатную температуру , промываютс в теплой проточной воде и просушиваютс .In order to obtain on the surface of a part a new film, which has a uniform opaque shade and has a stable and insignificant contact resistance (15-100 microns), the parts are etched for 2-20 minutes. in a solution of 140-220 chromic anhydride at room temperature, washed in warm running water and dried.
Способ удовлетвор ет требовани м как сварки, так и других видов обработки, требующих предварительного удалени оксидной пленки.The method satisfies the requirements of both welding and other treatments that require prior removal of the oxide film.
Предмет изобретени Subject invention
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU450494A SU101315A1 (en) | 1955-02-01 | 1955-02-01 | Oxide film removal bath |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU450494A SU101315A1 (en) | 1955-02-01 | 1955-02-01 | Oxide film removal bath |
Publications (1)
Publication Number | Publication Date |
---|---|
SU101315A1 true SU101315A1 (en) | 1955-11-30 |
Family
ID=48375176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU450494A SU101315A1 (en) | 1955-02-01 | 1955-02-01 | Oxide film removal bath |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU101315A1 (en) |
-
1955
- 1955-02-01 SU SU450494A patent/SU101315A1/en active
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