Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Application of 4,5-dihydrocarbylthio-1,3-dithiol-2-thione in the preparation of metal pickling solution

A technology of thiole and metal acid, applied in the field of metal pickling corrosion and protection, can solve problems such as lack of pickling solution

Active Publication Date: 2015-11-04
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of 4,5- Dihydrocarbylthio-1,3-dithiol-2-thione (dmitR 2 ) in the preparation of metal pickling liquid with corrosion inhibition, providing a new type of pickling liquid corrosion inhibitor and dmitR 2 Open up new fields of application

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
  • Application of 4,5-dihydrocarbylthio-1,3-dithiol-2-thione in the preparation of metal pickling solution
  • Application of 4,5-dihydrocarbylthio-1,3-dithiol-2-thione in the preparation of metal pickling solution
  • Application of 4,5-dihydrocarbylthio-1,3-dithiol-2-thione in the preparation of metal pickling solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 This embodiment is dmit(CH 2 CO 2 Et) 2 Effect of Concentration on Corrosion Inhibition Rate of Hydrochloric Acid Pickling Solution

[0034] In order to examine dmit (CH 2 CO 2 Et) 2 The relationship between the concentration and the corrosion inhibition rate of the hydrochloric acid pickling solution. In this embodiment, when the concentration of hydrochloric acid is the same (1 mol / L, molar concentration, the same below), add dmit (CH 2 CO 2 Et) 2 , so that its concentration in the hydrochloric acid pickling solution is 20-160 mg / L (see Table 1), and its concentration is calculated as dmit(CH 2 CO 2 Et) 2 The mass of the acid was divided by the volume of the pickling solution, and it was used for pickling of Q235 steel at a temperature of 30±1°C, and the corrosion inhibition rate of each pickling solution was measured. The results are shown in Table 1. And with dmit(CH 2 CO 2 Et) 2 The concentration C (mg / L) in the hydrochloric acid pickling s...

Embodiment 2

[0038] Example 2 This embodiment is the effect of hydrochloric acid concentration on the corrosion inhibition rate of pickling solution

[0039] In order to investigate the relationship between the concentration of hydrochloric acid and the corrosion inhibition rate of the pickling solution, this example uses dmit(CH 2 CO 2 Et) 2 According to the same concentration (100 mg / L in the pickling solution), it was added to hydrochloric acid solutions of different concentrations (see Table 2), and it was used for pickling of Q235 steel at a temperature of 30±1°C, and each The corrosion inhibition rate of pickling solution is shown in Table 2. And taking the concentration of hydrochloric acid (mol / L) as the abscissa, and the corrosion inhibition rate IE (%) as the ordinate, the relationship between the corrosion inhibition rate of the pickling solution and the concentration of hydrochloric acid in the hydrochloric acid pickling solution is obtained, as shown in figure 2 shown. ...

Embodiment 3

[0043] Example 3 This embodiment is the influence of temperature on the corrosion inhibition rate of hydrochloric acid pickling solution

[0044] In order to investigate the relationship between the temperature and the corrosion inhibition rate of hydrochloric acid pickling solution, this example will dmit(CH 2 CO 2 Et) 2 According to the same concentration (100 mg / L in the pickling solution), it is added to the same concentration of hydrochloric acid solution (1 mol / L), and it is used for pickling of Q235 steel under different temperature conditions. The corrosion inhibition rate of the washing solution is shown in Table 3. And take the pickling solution temperature T (°C) as the abscissa, and the corrosion inhibition rate IE (%) as the ordinate, to obtain the relationship between the pickling solution corrosion inhibition rate and temperature in the 1 mol / L hydrochloric acid pickling solution, as shown in image 3 shown.

[0045] Table 3 Effect of temperature on corros...

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 the application of 4,5-dihydrocarbylthio-1,3-dithiolane-2-thione (dmitR2) in the preparation of metal pickling liquid with corrosion inhibition effect. Adding dmitR2 to the pickling medium can obtain effective metal corrosion inhibition effect. The inventors have shown through a large number of experiments that dmitR2 such as dmit(CH2CO2Et)2, dmit(CH2CH=CH2)2, dmit(Bu n )2, etc. are added to various metal pickling media of different concentrations according to different concentrations to prepare pickling liquids, which have good metal corrosion inhibition effects, and the corrosion inhibition rate is affected by time, temperature, different pickling media and medium acidity, etc. The impact is small, it can be used for pickling of various metals, and has a wide range of applications. In addition, the raw materials for preparing dmitR2 are cheap and easy to obtain, so the cost of using it in metal pickling solution is low, and it is suitable for industrial popularization and application. The invention opens up a new application field for dmitR2.

Description

technical field [0001] The invention relates to the technical field of metal pickling corrosion and protection, in particular to a 4,5-dihydrocarbylthio-1,3-dithiolane-2-thione (dmitR 2 ) in the preparation of metal pickling solutions with corrosion inhibition. Background technique [0002] Corrosion is an important destructive factor in industry and life. For example, in the process of chemical pickling of metal equipment and metal components, the pickling solution will also corrode the metal substrate and cause hydrogen embrittlement corrosion of metal equipment while dissolving metal oxides. , resulting in a huge waste of metal resources. There have been many pickling solutions used in daily life and production, including inorganic acids such as sulfuric acid, hydrochloric acid, phosphoric acid, carbonic acid, and hydrofluoric acid, and organic acids such as acetic acid, citric acid, and EDTA. Pickling effect is better. [0003] Adding corrosion inhibitor to the pickli...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/06
Inventor 谢斌林肖朱莎莎张秀兰邹立科李玉龙陈能
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com