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Production method of seamless steel pipe with anti-corrosion layer

A technology for seamless steel pipes and production methods, applied in the direction of anti-corrosion coatings, pipeline anti-corrosion/rust protection, coatings, etc., can solve the problems of unsatisfactory film performance and high cost of seamless steel pipes, and achieve low cost and good film performance excellent effect

Inactive Publication Date: 2016-01-20
广州添龙钢管工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Seamless steel pipes generally need to be coated with an anti-corrosion layer, but the coating performance of seamless steel pipes is not ideal at present, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for producing a seamless steel pipe with an anti-corrosion layer, comprising the steps of:

[0016] 1) Add 90 parts by mass of castor oil, 15 parts by mass of organic clay and 8 parts by mass of polyether diol with a molecular weight of 4000 into the reaction kettle, heat and stir, raise the temperature to 80°C, add 40 parts by mass of toluene diisocyanate dropwise within 25 minutes, Stir for 3 hours, then raise the temperature to 90°C, stir for 3 hours, then lower the temperature to 60°C, add 120 parts by mass of styrene to the reaction system, stir for 3 hours, vacuum degas for 15 minutes, and then cool to room temperature;

[0017] 2) Add 3 parts by mass of polyether diol with a molecular weight of 4000, 9 parts by mass of castor oil, 2 parts by mass of azobisisobutyronitrile, and 0.7 parts by mass of dibutyltin dilaurate into the reaction system, and stir for 3 hours;

[0018] 3) Then raise the temperature of the reaction system to 70°C, keep it warm for 8 ...

Embodiment 2

[0023] A method for producing a seamless steel pipe with an anti-corrosion layer, comprising the steps of:

[0024] 1) Add 80 parts by mass of castor oil, 15 parts by mass of organoclay and 8 parts by mass of polyether diol with a molecular weight of 4000 into the reaction kettle, heat and stir, raise the temperature to 80°C, add 35 parts by mass of toluene diisocyanate dropwise within 20 minutes, Stir for 2 hours, then raise the temperature to 90°C, stir for 2 hours, then lower the temperature to 60°C, add 100 parts by mass of styrene to the reaction system, stir for 2 hours, vacuum degas for 10 minutes, and then cool to room temperature;

[0025] 2) Add 3 parts by mass of polyether diol with a molecular weight of 4000, 7 parts by mass of castor oil, 1 part by mass of azobisisobutyronitrile, and 0.4 parts by mass of dibutyltin dilaurate into the reaction system, and stir for 2 hours;

[0026] 3) Then raise the temperature of the reaction system to 70°C, keep it warm for 7 hou...

Embodiment 3

[0031] A method for producing a seamless steel pipe with an anti-corrosion layer, comprising the steps of:

[0032] 1) Add 84 parts by mass of castor oil, 15 parts by mass of organic clay and 8 parts by mass of polyether diol with a molecular weight of 4000 into the reaction kettle, heat and stir, raise the temperature to 80°C, add 37 parts by mass of toluene diisocyanate dropwise within 22 minutes, Stir for 2.5 hours, then raise the temperature to 90°C, stir for 2.5 hours, then lower the temperature to 60°C, add 110 parts by mass of styrene to the reaction system, stir for 2.5 hours, vacuum degas for 14 minutes, and then cool to room temperature;

[0033] 2) Add 3 parts by mass of polyether diol with a molecular weight of 4000, 7.9 parts by mass of castor oil, 1.2 parts by mass of azobisisobutyronitrile, and 0.47 parts by mass of dibutyltin dilaurate into the reaction system, and stir for 2.5 hours;

[0034] 3) Then raise the temperature of the reaction system to 70°C, keep i...

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PUM

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Abstract

The invention discloses a production method for a seamless steel tube with an anti-corrosion layer. The production method includes the following steps that anti-corrosion and anti-abrasion coating is prepared, a solid tube blank is cut to be with a needed length, the tube blank is punched on a puncher, a cavity is formed inside the tube blank, then the tube blank is delivered to an automatic tube rolling mill for rolling, and finally the wall thickness of the tube blank is reeled through a reeling mill to obtain a steel tube body; spraying treatment is performed on the surface of the steel tube body; a heating airless spraying method is adopted for coating the treated surface of the steel tube body with the anti-corrosion and anti-abrasion coating to form a coating film, and then the coating film is naturally dried. The production method for the seamless steel tube with the anti-corrosion layer is simple, convenient to implement, excellent in coating film performance and low in cost.

Description

technical field [0001] The invention relates to a method for producing seamless steel pipes with an anti-corrosion layer. Background technique [0002] Seamless steel pipes generally need to be coated with an anti-corrosion layer, but at present, the coating performance of seamless steel pipes is not ideal, and the cost is high. Contents of the invention [0003] The object of the present invention is to provide a production method of a seamless steel pipe with an anti-corrosion layer, which is simple and convenient, has excellent coating performance and low cost. [0004] In order to achieve the above object, the technical solution of the present invention is to design a production method of a seamless steel pipe with an anti-corrosion layer, comprising the steps of: [0005] 1) Add 80-90 parts by mass of castor oil, 15 parts by mass of organic clay and 8 parts by mass of polyether diol with a molecular weight of 4000 into the reaction kettle, heat and stir, raise the te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L58/04F16L9/02C09D151/08C09D7/12C09D5/08C08F283/00C08F212/08C08G18/76C08G18/67C08G18/48
CPCC08F283/008C08G18/10C08G18/36C08G18/4825C08G18/6696C08G2150/90C09D5/08C09D7/40C09D151/08F16L9/02F16L58/04C08F212/08C08G18/48
Inventor 须晓东
Owner 广州添龙钢管工业有限公司
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