SOLUTION FOR SIMULTANEOUS DEGREASING AND PHOSPHATING Russian patent published in 1997 - IPC

FIELD: chemical means for processing of metal surfaces, particularly, aqueous solutions for degreasing and phosphating; coloring operations. SUBSTANCE: solution comprises nitrate ions, water and phosphate-containing component additionally comprises oxyethylated monoalkyl phenols on the base of trimers of propylene; wherein mixture of extraction phosphoric acid and liquid complex fertilizer at their ratio 1:2 used as phosphate-containing component. Solution comprises, mas.%: mixture of extraction phosphoric acid and liquid complex fertilizer at their ratio 1:2 respectively, 0.49-1.2 (as calculated for P₂O₅); nitrate ions, 0.02-0.08; oxyethylated monoalkyl phenols on the base of trimers of propylene, 0.004-0.016, water, the balance. Extraction phosphoric acid comprises, mas.%: phosphate ions, 50-54 (as calculated for P₂O₅); sulfate sulfur, 0.8-4.2 (as calculated for SO₃); calcium ions, 0.2-0.4 (as calculated for CaO); ferrum ions, 0.3-1.3 (as calculated for Fe₂O₃); aluminium ions, 0.3-1.3 (as calculated for Al₂O₃); magnesium ions, 0.08-0.1 (as calculated for MgO); fluorine ions, 0.5-2.0; silicate ions, 0.1-0.4 (as calculated for SiO₂); water, the balance. EFFECT: improved quality. 2 cl, 2 tbl