| 摘要 |
FIELD: coating of materials. SUBSTANCE: aqueous liquid combination of simple and complex fluorides, chelate former for iron, phosphate-ions, hydroxylamine source and oxidizing reagent selected from a number of water-soluble nitroaromatic organic compounds, molybdates and tungstates provides for a high-quality protective phosphate conversion coating on iron, zinc-containing, aluminium and magnesium metal surfaces, as well as on surfaces of magnesium alloys; in this case there is no need in usage of cations of bivalent metals or metals with a higher valency, which are usually used for production of high-quality phosphate conversion coatings. EFFECT: if the compound contains adequate surface-active agents, preliminary chemical cleaning of treated metal is not required so as to attain good results. |
