SU139536A1 - The method of chemical cleaning products from corrosion of zinc or galvanized objects - Google Patents
The method of chemical cleaning products from corrosion of zinc or galvanized objectsInfo
- Publication number
- SU139536A1 SU139536A1 SU684042A SU684042A SU139536A1 SU 139536 A1 SU139536 A1 SU 139536A1 SU 684042 A SU684042 A SU 684042A SU 684042 A SU684042 A SU 684042A SU 139536 A1 SU139536 A1 SU 139536A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- zinc
- corrosion
- chemical cleaning
- cleaning products
- objects
- Prior art date
Links
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
Известны способы химической очистки от продуктов коррозии цинковых и оцинкованных предметов путем погружени очищаемых предметов в раствор разбавленной серной кислоты с последующей протиркой их древесными опилками в смеси с порощком мела.Methods are known for chemical cleaning of corrosion products of zinc and galvanized objects by immersing the objects to be cleaned in a solution of dilute sulfuric acid, followed by rubbing them with sawdust mixed with a chalk powder.
Однако обработка оцинкованной поверхности в серной кислоте приводит к сильному разрушению цинкового сло очищаемых предметов.However, the treatment of galvanized surface in sulfuric acid leads to a strong destruction of the zinc layer of the objects to be cleaned.
Предложенный способ позвол ет очистить оцинкованную поверхность от коррозии при полном сохранении сло цинка, а главное - создать на его поверхности пассивную пленку, защищающую от коррозии цинковую поверхность.The proposed method makes it possible to clean the galvanized surface from corrosion while fully preserving the zinc layer, and, most importantly, to create on its surface a passive film that protects the zinc surface from corrosion.
Предлагаемый способ химической очистки основан на способности цинка пассивироватьс в водных растворах слоем бихромата натри с азотной кислотой.The proposed chemical cleaning method is based on the ability of zinc to be passivated in aqueous solutions with a layer of sodium dichromate and nitric acid.
Способность к образованию пассивной пленки на цинке сохран етс в интервале концентраций бихромата натри от 70 до 200 г/л и азотной кислоты от 0,5 до 5% по весу, при температурном перепаде от 18 до 60 Технологический процесс очистки осуществл етс в определенной последовательности .The ability to form a passive film on zinc is maintained in the range of concentrations of sodium bichromate from 70 to 200 g / l and nitric acid from 0.5 to 5% by weight, with a temperature difference from 18 to 60. The cleaning process is carried out in a certain sequence.
Так производитс обезжиривание поверхности в растворе 30-40 г/л тринатрийфосфата, 5-10 г/л эмульгатора ОП-7 или ОП-10, 15-20 уайт-спирита при 50-60°, продолжительностью 3 минуты.This is how the surface is degreased in a solution of 30-40 g / l of trisodium phosphate, 5-10 g / l of OP-7 or OP-10 emulsifier, 15-20 white spirit at 50-60 °, lasting 3 minutes.
Удал ютс продукты коррозии в растворе, содержащем 100-110 г/.г бихромата натри , 1,5-3% азотной кислоты при 50-60° за врем 0,5-1 минуты.Corrosion products are removed in a solution containing 100-110 g / g of sodium bichromate, 1.5-3% nitric acid at 50-60 ° during 0.5-1 minute.
Проводитс нейтрализаци остатков кислоты в 2-3% раствора кальцинированной соды при 50-60° продолжительностью 0,5 минуты.The residues of the acid are neutralized in a 2-3% solution of soda ash at 50-60 ° for 0.5 minutes.
После каждой операции проводитс промывка поверхностей проточной водой при температуре 50-60°. Сущка очищенных поверхностей производитс при 110-120°.After each operation, the surfaces are washed with running water at a temperature of 50-60 °. Desolation of cleaned surfaces occurs at 110-120 °.
№ 139536- 2 Предмет изобретени No. 139536- 2 The subject invention
Способ химической очистки от продуктов коррозии цинковых или оцинкованных предметов, отличающийс тем, что, с целью обеспечени удалени продуктов коррозии и создани защитного сло , исходные издели обрабатывают раствором бихромата натри 70-200 г/л с азотной кислотой 0,5-5% по весу при 18-60° с последующей нейтрализацией и сушкой.The method of chemical cleaning of corrosion products of zinc or galvanized objects, characterized in that, in order to ensure the removal of corrosion products and create a protective layer, the original products are treated with a solution of sodium dichromate 70-200 g / l with nitric acid of 0.5-5% by weight at 18-60 °, followed by neutralization and drying.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU684042A SU139536A1 (en) | 1960-10-28 | 1960-10-28 | The method of chemical cleaning products from corrosion of zinc or galvanized objects |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU684042A SU139536A1 (en) | 1960-10-28 | 1960-10-28 | The method of chemical cleaning products from corrosion of zinc or galvanized objects |
Publications (1)
Publication Number | Publication Date |
---|---|
SU139536A1 true SU139536A1 (en) | 1960-11-30 |
Family
ID=48295616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU684042A SU139536A1 (en) | 1960-10-28 | 1960-10-28 | The method of chemical cleaning products from corrosion of zinc or galvanized objects |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU139536A1 (en) |
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1960
- 1960-10-28 SU SU684042A patent/SU139536A1/en active
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