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Corrosion-resistant steel tube for conveying industry fuel gas and preparation technology thereof

An industrial gas and preparation technology, applied to pipes, rigid pipes, anti-corrosion coatings, etc., can solve the problems of shortened service life and poor corrosion resistance of steel pipes, so as to prolong the service life, enhance the ability of blocking gas, and reduce the adhesion on The effect of the probability of the inner wall of the tube blank

Pending Publication Date: 2018-10-23
梅州中燃城市燃气发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The transportation of industrial gas requires the use of pipelines. The corrosion resistance of the steel pipes prepared in the prior art for the transportation of industrial gas is poor, which also leads to the shortening of the service life of the steel pipes.

Method used

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  • Corrosion-resistant steel tube for conveying industry fuel gas and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, a corrosion-resistant steel pipe for transporting industrial gas, its structure includes an outer coating, an electroplating layer, a tube blank and an inner coating in sequence from the outside to the inside.

[0032] Preferably, the outer coating is composed of 40 parts of vinylidene chloride composite polymer emulsion, 7 parts of iron red, 10.5 parts of sodium ethylenediamine tetramethylene phosphate, and 13 parts of diethylene triamine pentacarboxylate in terms of weight ratio. 4 parts, 4 parts of gallic acid, 18 parts of toluene, 0.6 parts of emulsified silicone oil, 0.6 parts of carboxymethyl cellulose and 24 parts of deionized water; after mixing and stirring the above components, the outer coating is made by ultrasonic emulsification.

[0033] Preferably, the plating metals in the electroplating layer are Zn and Sn; and the mass ratio of Zn and Sn is 1.5:1.

[0034] Preferably, the tube blank is composed of the following components in...

Embodiment 2

[0044] Such as figure 1 As shown, a corrosion-resistant steel pipe for transporting industrial gas, its structure includes an outer coating, an electroplating layer, a tube blank and an inner coating in sequence from the outside to the inside.

[0045] Preferably, the outer coating is composed of 30 parts of vinylidene chloride composite polymer emulsion, 9 parts of iron red, 10 parts of sodium ethylenediamine tetramethylene phosphate, and 15 parts of diethylene triamine pentacarboxylate in weight ratio. 3 parts of gallic acid, 20 parts of toluene, 0.3 parts of emulsified silicone oil, 0.9 parts of carboxymethyl cellulose and 22 parts of deionized water; after mixing and stirring the above-mentioned components, the outer coating is made by ultrasonic emulsification.

[0046] Preferably, the plating metals in the electroplating layer are Zn and Sn; and the mass ratio of Zn and Sn is 2.0:1.

[0047] Preferably, the tube blank is composed of the following components in terms of ...

Embodiment 3

[0057] Such as figure 1 As shown, a corrosion-resistant steel pipe for transporting industrial gas, its structure includes an outer coating, an electroplating layer, a tube blank and an inner coating in sequence from the outside to the inside.

[0058] Preferably, the outer coating is composed of 60 parts of vinylidene chloride composite polymer emulsion, 12 parts of iron red, 12 parts of sodium ethylenediamine tetramethylene phosphate, and 17 parts of diethylene triamine pentacarboxylate in weight ratio. parts, 7 parts of gallic acid, 22 parts of toluene, 1.0 parts of emulsified silicone oil, 1.2 parts of carboxymethyl cellulose and 27 parts of deionized water; after mixing and stirring the above components, they are then ultrasonically emulsified to make the outer coating.

[0059] Preferably, the plating metals in the electroplating layer are Zn and Sn; and the mass ratio of Zn and Sn is 2.5:1.

[0060] Preferably, the tube blank is composed of the following components in ...

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Abstract

The invention relates to the technical field of steel tubes, in particular to a corrosion-resistant steel tube for conveying industry fuel gas and a preparation technology thereof. Vinylidene chloridecomposite high polymer emulsion, ethylene diamine tetra (methylene phosphonic acid) sodium, diethylenetriamine pentacarboxylic acid salt and gallic acid in an outer coating are matched with one another to undergo not only a complex reaction with rust but also a high polymer reaction, so that speed of further corrosion of the outside of an steel tube is slowed down, and anti-rust effect of the steel tube is enhanced. Coated metal in an electroplated layer is Zn and Sn, which are electroplated on the surface of a tube blank, so that speed of corrosion of the surface of the tube blank by moisture can be reduced. Nb, V and Cu in the tube blank are mutually cooperated with one another to significantly improve abilities of atmospheric corrosion resistance and anti-hydrogen, anti-nitrogen and anti-ammonia corrosion at high temperature of the steel tube. Use of fumed silica in an inner coating enhances the ability of gas barrier of the inner coating, speed of corrosion of inner wall of the tube blank by moisture in fuel gas is slowed down, and the service life of the tube blank is prolonged.

Description

technical field [0001] The invention relates to the technical field of steel pipes, more specifically, to a corrosion-resistant steel pipe for transporting industrial gas and a preparation process thereof. Background technique [0002] Today, with the rapid development of modern industry, the role of industrial gas is particularly important. Industrial gas is relative to civil and commercial gas. It generally refers to the chemical reaction between the flame combustion characteristics of gas and the structural characteristics of metal or non-metal in the process of industrial production, so that the workpiece to be operated is divided or fused. phenomenon, so as to achieve the gas resource of industrial application effect. At present, common industrial gases mainly include: oxygen (including liquid oxygen), acetylene, propane, liquefied petroleum gas, natural gas, nitrogen, argon, helium, carbon dioxide, hydrogen, mixed gas and so on. [0003] The transportation of industr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/02F16L58/04C09D127/08C09D5/08C09D7/61C09D167/08C09D129/04C09D123/08
CPCC08K2003/2241C08K2201/011C08L2205/03C08L2205/035C09D5/08C09D7/61C09D127/08C09D167/08F16L9/02F16L58/04C08L83/04C08L1/286C08K3/22C08L9/00C08L29/04C08L23/0861C08K7/26
Inventor 张宏宇于双庆陈富宋斌胜
Owner 梅州中燃城市燃气发展有限公司
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