FIELD: metallurgy.
SUBSTANCE: water solution contains organic substance, water soluble compound of chromium, and water-dispersed silica and water. Organic substance corresponds to at least one substance chosen from hydroxyl acid with ratio hydroxyl group/carboxyl group in molecule from 3:1 to 10:1, its lactone form and its oxide derivative; water soluble compound of chromium (b) does not contain hexavalent chromium; and pH is from 0.7 to 6.0. According to the procedure the said water solution is applied on a steel sheet forming a coating layer on base of Sn containing from 1 to 8.8 wt % of Zn, and from 91.2 to 99.0 wt % of Sn; further the steel sheet is dried.
EFFECT: treated steel sheet with coating on base of tin possessing high resistance to corrosion and perfect adhesion with paint.
9 cl, 8 tbl
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