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2 200 774

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Application

2001111897/02, 2001-04-27

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Start date

2001-04-27

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Actual filing date

2001-04-27

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Published

2003-03-20

(72)

Inventor

Davydov S.N.Abdullin I.G.Akhijarov R.Zh.

(73)

Holder

Ufimskij Gosudarstvennyj Neftjanoj Tekhnicheskij Universitet

METHOD FOR PROTECTING LOCAL DAMAGED PORTIONS OF INSULATING COATING OF METAL PIPELINES FROM UNDERGROUND CORROSION Russian patent published in 2003 - IPC

Abstract RU 2200774 C2

FIELD: protection of pipelines from underground corrosion. SUBSTANCE: method involves injecting chemical reactant into ground, with aqueous solution of sulfuric acid zinc with concentration of 150-160 g/l per 1 cu.dm of surface to be protected and 1 cu.dm of surrounding ground being used as chemical reactant. Injection is conducted at cathodic protection potential of -0.85 - -1.15 V (as compared to copper-sulfate electrode). EFFECT: wider range of use and increased efficiency in protecting insulating coating of metal pipelines from underground corrosion. 1 dwg, 1 tbl

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RU 2 200 774 C2

Authors

Davydov S.N.

Abdullin I.G.

Akhijarov R.Zh.

Dates

2003-03-20—Published

2001-04-27—Filed

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