FIELD: chemistry.
SUBSTANCE: chromating composition for treating zinc-plated steel contains, g/l: hexavalent chromium ions 3.744-6.318, trivalent chromium ions 0.01-0.09, phosphate ions 13.60-22.95, thiocarbonic acid diamide 0.10-0.12 and water. The ratio of hexavalent chromium ions to phosphate ions in the solution is 0.275.
EFFECT: with minimum content of components, the chromating composition provides high corrosion resistance of zinc-plated steel, is environmentally friendly owing to optimum content of hexavalent chromium ions.
1 tbl, 4 ex
| Title | Year | Author | Number |
|---|---|---|---|
| CHROMATE TREATMENT COMPOSITION | 2012 |
|
RU2492280C1 |
| CHROMATISING COMPOSITION FOR TREATMENT OF ZINC-PLATED SURFACE | 2010 |
|
RU2425911C1 |
| COMPOSITION FOR ANTI-CORROSION COATING | 2016 |
|
RU2634447C1 |
| CHROMATING COMPOSITION FOR PROCESSING OF ZINC CURTAIN AND ZINC WIRE | 2015 |
|
RU2643759C2 |
| PASSIVATING COMPOSITION FOR TREATMENT OF GALVANIZED ROLLED METAL AND GALVANIZED WIRE | 2018 |
|
RU2699476C1 |
| COMPOSITION FOR ZINC SURFACE CHROME-PLATING | 1992 |
|
RU2006520C1 |
| METHOD OF TREATING COPPER AND SUPERCONDUCTIVE WIRE | 1998 |
|
RU2149227C1 |
| METHOD OF PRODUCING BICHROMATE OF TRIVALENT CHROME AND COMPOSITION FOR CHROME TREATMENT OF METAL SURFACES | 2008 |
|
RU2375310C1 |
| COMPOSITION FOR OBTAINING ELECTROINSULATING COATING | 2012 |
|
RU2489518C1 |
| SOLUTION FOR CHROMATIZING GALVANIZED STEEL | 0 |
|
SU1113425A1 |
