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Sunflower head corrosion inhibitor extract and method for preparing metal acid-pickling solution using the same

A sunflower plate and metal acid technology, applied in the field of sunflower plate corrosion inhibitor extract and its preparation of metal pickling solution, can solve the problems of low economic value, environmental pollution, resource waste, etc., and achieve simple production process and water solubility Good, low cost effect

Active Publication Date: 2017-02-15
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its economic value is low, resulting in waste of resources, and burning will pollute the environment

Method used

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  • Sunflower head corrosion inhibitor extract and method for preparing metal acid-pickling solution using the same
  • Sunflower head corrosion inhibitor extract and method for preparing metal acid-pickling solution using the same
  • Sunflower head corrosion inhibitor extract and method for preparing metal acid-pickling solution using the same

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preparation example Construction

[0033] The invention provides a method for preparing a metal pickling solution with sunflower disc extract as a corrosion inhibitor. The preparation method uses sunflower disc extract as a metal pickling corrosion inhibitor, a hydrochloric acid solution as a metal pickling reagent, and then The metal pickling reagent is added to the sunflower disk extract to prepare. Specifically, the sunflower disk is used as a raw material. After heat treatment, the sunflower disk corrosion inhibitor extract is prepared, and then hydrochloric acid solution is used as the metal pickling reagent to add the sunflower disk to the sunflower disk. In the etching agent extraction solution, the metal pickling solution is obtained.

[0034] The method for preparing a metal pickling solution includes:

[0035] S1: Prepare sunflower disc corrosion inhibitor extract and use it as metal pickling corrosion inhibitor;

[0036] S2: Prepare a 1mol / L hydrochloric acid solution and add it as a metal pickling reagent...

Embodiment 1

[0050] Prepare 100mL pickling solution according to sunflower plate extract and 1mol / L HCl 1:9(V / V) at a temperature of 20℃, and immerse the 45# carbon steel to be cleaned in the pickling solution for 48h. Its corrosion inhibition efficiency is 94.39%.

Embodiment 2

[0052] Prepare 100mL pickling solution according to the sunflower disc extract and 1mol / L HCl 2:8 (V / V) at a temperature of 20℃, and immerse the 45# carbon steel to be cleaned in the pickling solution for 48h. Its corrosion inhibition efficiency is 97.26%.

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Abstract

The present invention discloses a sunflower head corrosion inhibitor extract and a method for preparing a metal acid-pickling solution using the same. A corrosion inhibitor used in the method is from a sunflower head extract, and contains a principal active ingredient, i.e., an organic mixture (flavones, carbohydrates, chlorogenic acid, proteins and the like that contain functional groups playing a part in corrosion inhibition, such as large Pi-bond, an aromatic ring, a heteroaromatic ring, a heteroatom, a double bond, a triple bond, etc.) in the extract; and the metal acid-pickling solution with the sunflower head extract serving as the corrosion inhibitor is prepared using a hydrochloric acid solution as a metal acid-pickling reagent. A dosage ratio of the corrosion inhibitor to the acid-pickling reagent is 1:9 to 3:7 (V:V); the hydrochloric acid solution has a concentration of 1 mol / L; and the achieved optimum corrosion inhibition efficiency is 98.07%. According to the present invention, by using the sunflower head extract as the corrosion inhibitor for metal acid-pickling, the corrosion of a metal and a product thereof during acid-pickling can be prevented, and the dosage and consumption of the acid-pickling solution can also be reduced. The acid-pickling corrosion inhibitor has the characteristics of high efficiency, no toxicity, low cost, and the like.

Description

Technical field [0001] The invention belongs to the field of metal pickling solutions, and in particular relates to a sunflower disc corrosion inhibitor extract and a method for preparing a metal pickling solution. Background technique [0002] Pickling is an important method for surface pretreatment of metal materials, pipes and boiler systems to remove rust and dirt. It is widely used in different production processes in metal material processing, metallurgy, and electric power industries. At present, hydrochloric acid is the most widely used pickling reagent. However, although rust and dirt can be removed during the pickling process, it will also corrode some metal substrates. Therefore, the pickling process not only causes a great waste of metal materials and pickling liquid, but also generates a large amount of waste pickling liquid, causing serious environmental pollution. Statistics show that the waste pickling liquid produced in our country is about millions of cubic me...

Claims

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Application Information

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IPC IPC(8): C23G1/06
CPCC23G1/06
Inventor 马雪梅贺圣龙徐霞李超李军朱海林胡志勇曹端林
Owner ZHONGBEI UNIV
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