Acid adding inhibiter and method for acid pickling through acid adding inhibiter

A technology of corrosion inhibitor and pickling solution, which is applied in the field of acid pickling by adding corrosion inhibitor to acid and pickling of automobile structural steel. Corrosion inhibition, overcoming surface defects, and improving appearance

Active Publication Date: 2015-11-11
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The inventor of the present invention found in the process of hot-rolled pickling of automobile structural steel with the existing corrosion inhibitor that the steel plate was often felt to be unclean after pickling. During the pickling process or during the drying process after pickling, It is often found that there are black spots, yellow spots, lumpy black spots and darkening on the whole plate surface, and the corrosion rate of

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Acid adding inhibiter and method for acid pickling through acid adding inhibiter
  • Acid adding inhibiter and method for acid pickling through acid adding inhibiter
  • Acid adding inhibiter and method for acid pickling through acid adding inhibiter

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1

[0040] In container, add the water of 70kg, under the condition of stirring, add 5kg polyepichlorohydrin alkyl trimethyl ammonium chloride (formula (I) structure, X 1 =Cl, m=4), 10 kg of thiourea, 10 kg of aluminum phosphate and 5 kg of phytic acid, and dissolved them in sequence to obtain an aqueous solution I1 with a corrosion inhibitor added to the acid.

Example Embodiment

[0041] Example 2

[0042] Add 65kg of water to the container, add 10kg of tetrabutylammonium iodide, 10kg of thiourea, 10kg of a 1:1 mixture of aluminium phosphate and aluminium dihydrogen phosphate and 5kg of phytic acid to the water successively under stirring conditions and make them sequentially Dissolve, and finally obtain the aqueous solution I2 of the corrosion inhibitor added to the acid.

Example Embodiment

[0043] Example 3

[0044] In container, add the water of 82kg, under the condition of stirring, add successively 5kg tetradecylbenzyldimethyl ammonium chloride, 5kg thiourea, 5kg aluminium dihydrogen phosphate and 3kg phytic acid and tannic acid 1: 1 and make them dissolve in sequence, and finally obtain the aqueous solution I3 with corrosion inhibitor added to the acid.

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 relates to the field of inhibiters, and discloses an acid adding inhibiter and a method for acid pickling through the acid adding inhibiter. The acid adding inhibiter comprises quaternary ammonium compounds, thiourea, aluminum phosphate and/or aluminum dihydrogen phosphate and phytic acid and/or tannic acid. The acid adding inhibiter can be used in special steel such as automobile structural steel, is small in use amount and has excellent corrosion inhibition performance. Automobile structural steel hot-rolled acid pickling plates with good surface quality can be obtained. Besides, operation cost is low, and economic benefits are good.

Description

technical field [0001] The invention relates to the field of corrosion inhibitors, in particular, to a corrosion inhibitor for addition in acid, a preparation method for the inhibitor for addition in acid, and the use of the inhibitor for addition in acid to acidify automobile structural steel method of washing. Background technique [0002] P510, P510L, SAPH and other series of automotive structural steel hot-rolled pickled sheets are high-grade products in pickling sheets, mainly used for structural parts such as automobile chassis or inner door panels. quality, and the strength is higher than that of the cold-rolled sheet. With the continuous development of the automobile industry, the market's requirements for hot-rolled acid-washed sheets for automobiles continue to increase. On the premise of ensuring stamping and forming performance, it is also necessary to have a certain surface gloss to improve the surface quality of product coating and pre-treatment. The goal. ...

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): C23G1/06C23F11/04
Inventor 许哲峰李正荣郑之旺李俊洪翁建军李卫平王羿周伟
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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