FIELD: chemistry.
SUBSTANCE: composition is proposed for forming a protective oxide-zirconium coating on a steel surface prior to applying a paint coating comprising the following components: hexafluorozirconic acid 0.08-0.25%, nickel nitrate (in terms of metal) 0.002-0.012%, ammonium paramolybdate 0.01-0.03%, the rest is water. A method for forming a protective oxide-zirconium coating is also provided, comprising treating the steel surface for 3-8 minutes with said composition at a pH of 4.0-5.5 and a temperature of 20-40°C, and subsequently drying at a temperature of 100-140°C.
EFFECT: inventions make it possible to obtain protective titanium-containing coatings on a steel or aluminium surface that have high corrosion resistance and improve adhesion followed by a paint coating, and prevent contamination of the working solution with heavy metal ions.
2 cl, 1 tbl, 7 ex
| Title | Year | Author | Number |
|---|---|---|---|
| COMPOSITION FOR FORMING ADHESION TITAN CONTAINING COATING ON STEEL OR ALUMINIUM SURFACE AND METHOD OF ITS APPLICATION | 2015 |
|
RU2620235C1 |
| COMPOSITION FOR ANTICORROSIVE PHOSPHATE COATINGS FORMATION ON STEEL SURFACE | 2016 |
|
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| COMPOSITION FOR TREATING STEEL OR ALUMINIUM SURFACE | 2012 |
|
RU2515408C2 |
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|
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|
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| CHROMATE-FREE COMPOSITION BASED ON CERIUM AND LANTHANUM COMPOUNDS FOR PASSIVATION OF ZINC SURFACES | 2020 |
|
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|
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| METHOD FOR OBTAINING COATING FROM METAL OXIDES ON STEEL | 2010 |
|
RU2449061C1 |
