FIELD: metallurgy.
SUBSTANCE: solution for phosphatisation of steel surface includes the following, g/l: 5.55-18.72 of zinc ions (Zn2+), 4.35-15.68 of phosphoric anhydride (P2O5), 9.25-33.6 of nitrate ions (NO3 -), 0.56-2.46 of sodium ions (Na+), 0.19-0.82 of ammonium ions (NH4 +) and water is the rest (up to 1 l). Mass ratio of sum of zinc and sodium cations to phosphoric anhydride in the solution is (Zn2++Na+):P2O5 = (1-3.47):(0.71-2.57), and mass ratio of ammonium ions to sodium ions is (NH4 +:Na+) = 1:3.
EFFECT: invention allows obtaining qualitative phosphate coating and performing treatment of metal surface prior to wet drawing operations and other operations of cold deformation, provides safe operation and improves working conditions.
1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PREPARATION OF SURFACE OF WIRE BEFORE DRY DRAWING | 1999 |
|
RU2170285C2 |
| METHOD OF TREATMENT OF WIRE SURFACE BEFORE DRY DRAWING | 2001 |
|
RU2190693C1 |
| SOLUTION FOR PHOSPHATING | 1993 |
|
RU2065892C1 |
| METHOD OF RECEIVING OF PHOSPHATE COATING | 2007 |
|
RU2354747C1 |
| METHOD OF PREPARATION OF METAL SURFACES BEFORE COLD DEFORMATION | 1999 |
|
RU2176287C2 |
| SOLUTION FOR PHOSPHATATION OF METAL SURFACE | 1996 |
|
RU2111282C1 |
| METHOD OF PREPARING ZINC NITRATE-PHOSPHATE CONCENTRATE | 2008 |
|
RU2380458C1 |
| PHOSPHATE COATING PRODUCTION METHOD | 2018 |
|
RU2690876C1 |
| METHOD OF PREPARING ZINC NITRATE PHOSPHONATE CONCENTRATE | 1995 |
|
RU2115618C1 |
| SOLUTION FOR PHOSPHATING OF METAL SURFACE | 1999 |
|
RU2159299C2 |
