C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
148/17, 204/57
C23F 11/18 (2006.01) C03C 4/00 (2006.01)
Patent
CA 1257526
ABSTRACT A compound for protecting the internal sur- face of a pipeline against corrosion comprises an alloy of sodium polyphosphate or monosubstituted potassium phosphate with the silicate of an alkaline metal or silicon dioxide, taken in the weight ratios 9 - 50:1, respectively. A method of producing this compound resides in mixing sodium polyphosphate or monosubstituted potassium phosphate with the silicate of an alkaline metal or silicon dioxide in the weight ratios 9- 50:1, respectively, the mixture obtained is fused at a temperature of 800 to 1000°C, with a sub- sequent cooling of the resultant alloy up to a vitreous structure and the provision of an end product. A method of protecting the internal surface of a pipeline against corrosion resides in introducing the compound with the concentration of 0.3 to 3.5 mg/l in terms of P2O5 in the operating pipeline for a pipeline with water, or with the concentration of 25 to 250 mg/l in terms of phosphorus in a sea water pipeline.
493200
Abramova Ljubov I.
Chernyai Alexandr I.
Kapralova Viktoria I.
Kryazhevskikh Nikolai F.
Lukin Evgeny G.
Alma-Atinsky Institut Inzhenerov Zheleznodorozhnogo Transporta
Institut Khimicheskikh Nauk Akademii Nauk Kazakhskoi Ssr
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Trest "juzhvodoprovod"
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