Steel pipe surface treatment liquor and application method thereof

Abstract

The invention discloses steel pipe surface treatment liquor, which belongs to the technical field of pipeline surface treatment liquor and consists of phosphorization liquor and film forming liquor. The weight proportion of the phosphorization liquor and the film forming liquor is 2-3:1. The invention further discloses an application method of the steel pipe surface treatment liquor. The treatment liquor can be used for treating the surfaces of steel pipelines and can guarantee better adhesion force of subsequent repair and reinforcing process.

Description

Technical field [0001] The invention relates to the technical field of pipeline surface treatment liquids, and in particular to a steel pipeline that can be used to carry out rust conversion treatment on the surface of a steel pipeline to ensure that the subsequent repair and reinforcement process has better adhesion, thereby making the pipeline corrosion resistant Surface treatment liquid and its use method. Background technique [0002] Under normal circumstances, steel pipelines used to transport oil and gas will be affected by the transportation medium and cause chemical corrosion, electrochemical corrosion and other corrosion, which will cause the pipeline to crack, which will lead to the decline of pipeline safety performance, and finally cause pipeline burst or leakage. Security incident. Therefore, it is necessary to repair and strengthen the damage of the pipeline. Existing technology usually refers to "GB / T 8923-1988 Steel Surface Modification Grade and Derusting Grad...

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Problems solved by technology

[0003] 1) It is difficult for the grinding tool to touch the rust spots in the diffuse corrosion or corrosion groove pits and polish them clean;

[0004] 2) It is difficult to remove the severely corroded scale;

[0005] 3) During actual construction, it is difficult to achieve St 3 level of grinding and derusting, which makes it difficult or impossible to achieve on-site sandblasting and derusting;

[0006] 4) When removing rust on site, electric wire brushes are usually used. However, when electric wire brushes are difficult to polish parts of the surface, electric grinding wheels are often used on site to polish, which also damages the pipeline body while removing rust, leading to new risks.

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