Corrosion-resistant seamless stainless steel pipe and machining process thereof

A stainless steel tube and processing technology, applied in anti-corrosion coatings, coatings, conjugated diene coatings, etc., can solve problems such as pitting corrosion and crevice corrosion, improve corrosion resistance, improve corrosion resistance, and improve curing. The effect of efficiency

Inactive Publication Date: 2021-11-12
浙江东方齐心钢业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned stainless steel pipes usually cause corrosion phenomena such as pitting corrosion and crevice corrosion due to improper maintenance or use, so the inventor believes that the current seamless stainless steel pipes still need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The application discloses a corrosion-resistant seamless stainless steel pipe and its preparation method; a corrosion-resistant seamless stainless steel pipe, including a steel pipe body, the surface of the steel pipe body is coated with a corrosion-resistant layer, and the corrosion-resistant layer includes the following components: Saturated polyester resin, liquid nitrile rubber, sodium cocoeth sulfate, catalyst, trioleyl phosphate, diatomaceous earth and zinc powder; among them, the catalyst is diketopiperazine, and the unsaturated polyester resin used The preparation method is as follows:

[0042] Stir and react 2 parts of terpene resin and 0.4 part of calcium oleate at 50°C for 30 minutes to obtain a resin mixture; then add 8 parts of diethylene glycol and 0.4 parts of 4-methylhexahydrophthalic anhydride to the resin mixture and mix them, Polycondensation under conditions, stop the reaction after 1 hour of reaction, cool to 80°C and then add 4 parts of toluene; fi...

Embodiment 2

[0048] The application discloses a corrosion-resistant seamless stainless steel pipe and its preparation method; a corrosion-resistant seamless stainless steel pipe, including a steel pipe body, the surface of the steel pipe body is coated with a corrosion-resistant layer, and the corrosion-resistant layer includes the following components: Saturated polyester resin, liquid nitrile rubber, sodium cocoeth sulfate, catalyst, trioleyl phosphate, diatomaceous earth and zinc powder; among them, the catalyst is diketopiperazine, and the unsaturated polyester resin used The preparation method is as follows:

[0049] Stir and react 4 parts of terpene resin and 0.5 part of calcium oleate at 60°C for 40 minutes to obtain a resin mixture; then add 11 parts of diethylene glycol and 0.5 parts of 4-methylhexahydrophthalic anhydride to the resin mixture and mix them, Under the conditions of polycondensation, stop the reaction after 1.5 hours of reaction, cool to 90°C and then add 5 parts of ...

Embodiment 3

[0055] The application discloses a corrosion-resistant seamless stainless steel pipe and its preparation method; a corrosion-resistant seamless stainless steel pipe, including a steel pipe body, the surface of the steel pipe body is coated with a corrosion-resistant layer, and the corrosion-resistant layer includes the following components: Saturated polyester resin, liquid nitrile rubber, sodium cocoeth sulfate, catalyst, trioleyl phosphate, diatomaceous earth and zinc powder; among them, the catalyst is diketopiperazine, and the unsaturated polyester resin used The preparation method is as follows:

[0056] First, 3 parts of terpene resin and 0.4 part of calcium oleate were stirred and reacted at 55 °C for 35 minutes to obtain a resin mixture; Polycondensation under the conditions, stop the reaction after 1.2h of reaction, cool to 85°C and then add 5 parts of toluene; finally add 2 parts of 1,4-cyclohexadiene and mix well.

[0057] The content of each component is shown in ...

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Abstract

The invention relates to a corrosion-resistant seamless stainless steel pipe and a machining process thereof. The corrosion-resistant seamless stainless steel pipe comprises a steel pipe body, the surface of the steel pipe body is coated with a corrosion-resistant layer, and the corrosion-resistant layer comprises the following components in parts by weight: 30-40 parts of unsaturated polyester resin; 8-9 parts of liquid nitrile rubber; 10-12 parts of coconut oil alcohol polyether sodium sulfate; 1-2 parts of a catalyst; 2-3 parts of trioleyl phosphate; 1-2 parts of diatomite; 1-2 parts of zinc powder; the machining process of the corrosion-resistant seamless stainless steel pipe comprises the steps of preparation of the corrosion-resistant coating and coating of the corrosion-resistant layer. The corrosion-resistant seamless stainless steel pipe has the following advantages and effects that the sodium coconut oil alcohol polyether sulfate and the unsaturated polyester resin are mixed, the viscosity of the unsaturated polyester resin is reduced, meanwhile, the curing efficiency is improved, the unsaturated polyester resin and the liquid nitrile rubber are evenly mixed and closely stacked to form a compact structure, and damage of corrosive substances to a steel pipe is isolated; and further addition of diatomite and metal zinc powder can increase the corrosion resistance of the corrosion-resistant layer.

Description

technical field [0001] The present application relates to the technical field of stainless steel pipes, in particular to a corrosion-resistant seamless stainless steel pipe and its processing technology. Background technique [0002] In recent years, stainless steel pipes have become one of the fastest-growing varieties of steel in my country, and their scope of use has become more and more extensive, such as being widely used in nuclear power plants, oil and gas exploration, chemical industry, chemical fertilizers, environmental protection, automobiles, transportation, water supply, light industry , medicine, aviation, aerospace and other fields; at present, the production processes of stainless steel seamless pipes mainly include hot extrusion, hot rolling, cold rolling and cold drawing processes. [0003] The existing Chinese patent with authorized publication number CN112301288A discloses a method for processing an ultra-long seamless stainless steel tube, which includes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D109/02C09D5/10C09D7/61C09D7/63C09D7/65
CPCC09D167/06C09D5/106C09D7/61C09D7/70C09D7/63C09D7/65C08L2205/03C08L2203/18C08K2003/0893C08L9/02C08L71/00C08K5/521C08K7/26C08K3/08C08K5/098
Inventor 陈秋黄胜波
Owner 浙江东方齐心钢业集团有限公司
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