FIELD: organic chemistry, anticorrosive agents.
SUBSTANCE: invention relates to preparing black conversion oxide covers on steel designated for protection of steel surfaces against corrosion and for precipitation of articles of heating elements of sun-absorbing devices in heliotechnique. Electrolyte comprises sodium, aluminum and iron nitrates and, additionally, hydrogen peroxide and compound of the formula: 
in the following concentrations of components, g/l: sodium nitrate, 8-10; aluminum nitrate, 3-5; iron nitrate, 3-4; hydrogen peroxide, 2-4; compound of the above given formula, 0.5-1.2. Invention provides decreasing the solution concentration, oxidation point and duration of process, enhancing protecting properties, excluding additional procedures, sufficient absorbing capacity with respect to solar radiation and reducing toxicity of electrolyte.
EFFECT: improved and valuable properties of electrolyte.
1 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| ELECTROLYTE FOR SEDIMENTATION OF BLACK ANTI CORROSION OXIDE COATINGS ON STEEL | 2008 |
|
RU2365676C1 |
| ELECTROLYTE FOR BLACK CHROMATIZING OF ZINC | 1997 |
|
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| METHOD OF PRODUCING OF BLACK WEAR-RESISTANT ANTI-CORROSION COATING ON ALUMINIUM AND ALUMINIUM BASED ALLOYS BY METHOD OF MICROARC OXYDATION | 2014 |
|
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| METHOD OF ANTICORROSION PROCESSING OF ALUMINIUM ALLOYS | 2013 |
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| METHOD OF DETERMINING THROUGH POROSITY OF OXIDE COATS OF STEELS | 2000 |
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| SOLUTION FOR OBTAINING MAGNETITE COATINGS ON STEEL | 2012 |
|
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| PROCESS OF MICROARC MANUFACTURE OF PROTECTIVE FILMS ON SURFACES OF METALS AND THEIR ALLOYS | 1991 |
|
RU2061107C1 |
| METHOD FOR PRODUCTION OF ANTICORROSION COATINGS ON STEEL | 2009 |
|
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| METHOD OF PRODUCING PROTECTIVE ANTICORROSION COATINGS ON ALUMINUM ALLOYS WITH WELDED SEAMS | 2019 |
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| ELECTROLYTE OF ALUMINIUM AND ITS ALLOYS ANODIC TREATMENT | 2009 |
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RU2416680C1 |
