PREPARATION FOR CHEMICAL CLEANING OF METAL SURFACES FROM RUST, OIL COATINGS, HIGH-TEMPERATURE IRON OXIDES (SCALE), FUR AND CAKING

摘要

The preparation is used in industry, especially in the automobile industry - for cleaning rust and oils of iron sheets before subjecting them to stamping, pressing, etc., in metallurgy - both for cleaning of rust from individual parts, and for the full substitution of the standard technology of etching of high-temperature oxides with sulphuric, hydrocloric ot nitric acid, and in the energetics - for cleaning of boilers and tubing heating systems from boiler scale and caking, in shipbuilding - for chemical treatment of rusty metal surfaces, in assembly operation - for preliminary cleaning from rust of airduct and ventillation systems and steel chimney stackes, etc. before assembling. Them it contains waste waters from the manufacture of woodem and fibrous boards according a wet method, whey from the manufacture of white brined cheese, wine vinegar, orthophosphoric acid, rongolite, "Veronol H10" and formylaminoantiverin in the folloving ingredient ratios in wt.%: waste waters from 10.0 to 45.0, whey up to 40.0, vine venegar from 6.0 to 40.0, orthophosphoric acid from 2.0 to 6.5, rongalite from 1.0 to 4.5 Veronol H10 from 1.8 to 5.4 and formylaminoantiverin from 1.5 to 4.6.