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Rust-proof welded pipe and preparation method thereof

A technology for welded pipes and pipes, applied in the field of welded pipes, can solve the problems of short service life, easy rusting at the welding interface, affecting the performance of welded pipes, etc., and achieve the effect of improving service life and excellent anti-rust performance.

Inactive Publication Date: 2018-12-07
JIANGSU AIKEQING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, welded pipes are widely used outdoors. Due to long-term exposure to the external environment, especially welded pipes used in guardrails, under the action of rain for a long time, the welded joints are prone to rust. , affecting the overall performance of the welded pipe, resulting in a shorter service life

Method used

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  • Rust-proof welded pipe and preparation method thereof

Examples

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preparation example Construction

[0022] The present invention also includes a method for preparing an anti-rust welded pipe, comprising:

[0023] S101. Use stainless steel welding rods to weld a plurality of steel pipes in sequence to form a welded pipe, and perform pretreatment on the surface of the steel pipes and the welded joints;

[0024] S102. According to the ratio, add epoxy resin and water-soluble butadiene resin into the container and mix and stir. After stirring for 5-10 minutes, keep stirring, and then add colloidal silicon dioxide, phosphate, and magnesium sulfate into the container. Continue stirring for 10-20min to obtain a composite oxidation fluid;

[0025] S103. After applying the composite oxidation fluid on the surface of the steel pipe and the welded interface, heat and dry to form a composite oxidation coating on the surface of the welded pipe.

[0026] Further, in the step S101, the stainless steel electrode used is made of the following components by weight percentage: carbon 0.1-0.2%...

Embodiment 1

[0028] Preparation of anti-rust welded pipe G-1

[0029] Table 1 Composite oxide coating formula table

[0030] components

Dosage (kg)

Colloidal silica

8.0

potassium phosphate

3.5

magnesium sulfate

3.2

epoxy resin

20.5

Water-soluble phenolic resin

5.2

[0031] S101. A welded pipe formed by welding multiple steel pipes sequentially with stainless steel electrodes. After the welded joints are polished, the surface of the entire welded pipe is subjected to alkaline degreasing treatment; the stainless steel electrodes used are made of the following components by weight percentage Obtain: carbon 0.1%, chromium 25%, molybdenum 3%, silicon 0.5%, nickel 24%, and the rest is iron;

[0032] S102. According to the ratio, add epoxy resin and water-soluble butadiene resin into the container and mix and stir at a stirring speed of 200r / min. After stirring for 10 minutes, keep stirring, and then add colloidal silicon dioxid...

Embodiment 2

[0035] Preparation of anti-rust welded pipe G-2

[0036] Table 2 Composite oxide coating formula table

[0037] components

Dosage (kg)

Colloidal silica

8.8

sodium phosphate

4.5

magnesium sulfate

3.8

epoxy resin

23.0

Water-soluble phenolic resin

6.5

[0038] S201. A welded pipe formed by welding multiple steel pipes sequentially with stainless steel electrodes. After the welded joints are polished, the surface of the entire welded pipe is subjected to alkaline degreasing treatment; the stainless steel electrodes used are made of the following components by weight percentage Obtain: carbon 0.15%, chromium 28%, molybdenum 3.2%, silicon 0.8%, nickel 22%, and the rest is iron;

[0039] S202. According to the ratio, add epoxy resin and water-soluble butadiene resin into the container and mix and stir. The stirring speed is 300r / min. Magnesium and organic pigment are added in the container, continue to stir for 15m...

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Abstract

The invention discloses a rust-proof welded pipe. The rust-proof welded pipe comprises a welded pipe formed by successive welding of a plurality of steel pipelines, and a composite oxidized coating formed on the surfaces of the steel pipelines and welding joints, wherein the composite oxidized coating is prepared from the following components by weight: 8 to 10 parts of colloidal silicon dioxide,3 to 5 parts of phosphate, 3 to 5 parts of magnesium sulfate, 20 to 25 parts of epoxy resin and 5 to 7 parts of water-soluble phenolic resin. The rust-proof welded pipe provided by the invention has excellent rust-proof performance at the welding joints and is greatly improved in service life.

Description

technical field [0001] The invention relates to a welded pipe, in particular to a rust-proof welded pipe and a preparation method thereof. Background technique [0002] In the prior art, welded pipes are widely used outdoors. Due to long-term exposure to the external environment, especially welded pipes used in guardrails, under the action of rain for a long time, the welded joints are prone to rust. , affecting the overall performance of the welded pipe, resulting in a shorter service life. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide an anti-rust welded pipe, which has excellent anti-rust performance at the welded joint and greatly improves the service life. [0004] In order to solve the above problems, the technical scheme adopted in the present invention is as follows: [0005] An antirust welded pipe, comprising a welded pipe formed by sequential welding of a plurality o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D161/06C09D5/08C09D7/61
CPCC08K2003/3063C08L2201/08C08L2203/18C09D5/08C09D7/61C09D163/00C08L61/06C08K3/36C08K3/32C08K3/30
Inventor 李琳
Owner JIANGSU AIKEQING IND