Nano additive used for steel pipe pickling solution and preparation method for nano additive

A nano-additive and pickling solution technology, which is applied in the field of steel pickling solution, can solve the problems of large hydrochloric acid volatilization, high consumption of hydrochloric acid, and increased production costs, and achieve reduced corrosion, long service life, and accelerated pickling speed Effect

Inactive Publication Date: 2017-05-10
SHANGHAI INST OF TECH
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] These methods have obvious disadvantages, and this method is no longer used for rust removal with sulfuric acid solution.
[0014] Nowadays, a single hydrochloric acid aqueous solution is generally used to derust the iron oxide on...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of nano-additive used in steel pipe pickling solution, which is composed of nano-lanthanum borate emulsion, after it is prepared with concentrated hydrochloric acid to form pickling solution, the mass percentage of nano-lanthanum borate emulsion is 0.08%, using the above-mentioned nano-additive to the diameter of 50mm The seamless steel pipe is pickled for 6 seconds, and the acid mist is reduced by one-fifth, which can increase the release speed and expansion area of ​​hydrochloric acid in the pickling solution, improve the utilization rate of hydrochloric acid in the pickling solution, and increase the pickling speed by 8%. The production efficiency is improved; compared with the pickling solution without nano-additives, the oxide skin on the steel wire surface is more thoroughly removed and the surface is more uniform after pickling with nano-additives.

Embodiment 2

[0037] A kind of nano-additive used in steel pipe pickling solution, which is composed of nano-cerium borate emulsion, after it is prepared with concentrated hydrochloric acid to form pickling solution, the mass percentage of nano-cerium borate emulsion is 0.06%, using the above-mentioned nano-additive to the diameter of 75mm The seamless steel pipe is pickled for 5 seconds, and the acid mist is reduced by a quarter, which can increase the release speed and expansion area of ​​hydrochloric acid in the pickling solution, improve the utilization rate of hydrochloric acid in the pickling solution, and increase the pickling speed by 10%. Compared with the pickling solution without nano-additives, the oxide skin on the steel wire surface is more thoroughly removed and the surface is more uniform after pickling with nano-additives.

Embodiment 3

[0039] A nano-additive used in steel pipe pickling liquid, which is composed of nano-lanthanum borate and nano-cerium borate emulsion. After it is prepared with concentrated hydrochloric acid to form a pickling liquid, the mass percentage of nano-lanthanum borate and nano-cerium borate emulsion is 0.06% respectively and 0.07%, using the above-mentioned nano-additives to pickle the seamless steel pipe with a diameter of 120mm for 7 seconds, the acid mist is reduced by one-third, which can increase the release speed and expansion area of ​​hydrochloric acid in the pickling solution, and improve the acid pickling solution. The utilization rate of hydrochloric acid increases the pickling speed by 14%. Compared with the pickling solution without nano-additives, the oxide scale on the steel wire surface is more thoroughly removed and the surface is more uniform after pickling with nano-additives.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a nano additive used for a steel pipe pickling solution and a preparation method for the nano additive. The nano additive is chemically modified nano lanthanum borate emulsion or/and nano cerium borate emulsion. A chemical modification agent adopts oleic acid and a surfactant. The surfactant is selected from any one or more of alkylbenzene sulfonate, fatty alcohol-polyoxyethylene ether or alkylphenol ethoxylates. The pickling solution is prepared by the nano additive and hydrochloric acid. The nano additive accounts for 0.01-2.0 wt% of the pickling solution. Compared with a hydrochloric acid pickling solution which does not contain a nano additive, the hydrochloric acid pickling added with the chemically modified nano lanthanum borate emulsion or/and the nano cerium borate emulsion can significantly reduce acid mist, improve the pickling efficiency and save the pickling time. An oxide skin on the surface of a pickled steel pipe is thoroughly removed, and the surface is uniform.

Description

technical field [0001] The invention relates to an environment-friendly and energy-saving nano-additive for steel surface pickling and a preparation method thereof, belonging to the technical field of steel pickling liquid. Background technique [0002] Pickling seamless steel pipes with traditional pickling solutions will cause the following problems: [0003] 1) Diluted sulfuric acid is used to directly clean the oxide layer. After the surface oxide layer is removed, the acid will react with the elemental iron in the inner layer, corrode the inner layer metal, change the physical properties of the product, and affect the product quality. [0004] 2) By increasing the temperature of the liquid in the pickling tank, the peeling off of the oxidized black skin is promoted. Due to the high temperature of the liquid, a large amount of acid mist is produced in the pickling pool, which damages the health of the workers in the pickling workshop, causes serious corrosion to the equ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C23G1/08
CPCC23G1/08
Inventor 叶斌
Owner SHANGHAI INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap