FIELD: chemistry.
SUBSTANCE: composition contains hydrochloric acid in amount of 2-15 wt %, a corrosion inhibitor - urotropin or thiourea - 0.5-3%, sodium, potassium or ammonium fluoride - 1-4%, meta-nitrobenzenesulphonic acid - 3-7% and water - the rest up to 100%. The disclosed composition provides efficient dissolution of low solubility scales which contain carbonates, silicates, silicon dioxide and sulphates.
EFFECT: negligible corrosion of equipment observed when the composition is used.
18 ex
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