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Reagent for removing hydrogen in pickling process and preparation method thereof

A technology of pickling and reagents, which is applied in the field of reagents for eliminating hydrogen in the pickling process and its preparation field, can solve problems such as environmental safety hazards, and achieve the effect of an environmentally friendly production environment

Inactive Publication Date: 2018-10-23
宜兴大平杆塔制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The HCl+Zn chemical equation tells us that HCl+Zn=ZnCl+H 2 ↑, a large amount of dangerous gas hydrogen will be produced in an instant, causing great safety hazards to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: The optimal dosage of a reagent for eliminating hydrogen in the pickling process is that each liter of passivation solution contains: 20-30% hydroxyacetic acid, 25-36% citric acid, 20-28% sulfamic acid acid.

[0016] The concentration of the glycolic acid is 27-33°C, the concentration of the citric acid is 29-37°C, and the concentration of the sulfamic acid is 8-17°C.

[0017] A preparation method for a reagent for eliminating hydrogen in the pickling process, comprising the following steps, (1) first mixing 20-30% hydroxyacetic acid and 25-36% citric acid and stirring, stirring for 36-50 minutes, and the stirring temperature is 32~60℃;

[0018] (2) Add 20-28% sulfamic acid to the mixture obtained after the stirring in step (1) and continue stirring for 23-32 minutes at a stirring temperature of 26-33°C;

[0019] (3) After the stirring in step (2), vacuumize for 15~21min at a vacuum degree of 0.46~0.7Mpa, and then keep warm for 32~43min;

[0020] (4) Dilut...

Embodiment 2

[0021] Embodiment 2: A kind of optimal consumption of the reagent that is used for eliminating hydrogen in the pickling process is, every liter of passivation solution comprises respectively: 15~23% hydroxyacetic acid, 20~28% citric acid, 12~23% sulfamic acid acid.

[0022] The concentration of the hydroxyacetic acid is 30-36°C, the concentration of citric acid is 35-41°C, and the concentration of sulfamic acid is 15-19°C

[0023] A preparation method for a reagent for eliminating hydrogen in the pickling process, comprising the following steps, (1) first mixing 15-23% hydroxyacetic acid and 20-28% citric acid and stirring, stirring for 43-56min, and the stirring temperature is 37~46℃;

[0024] (2) Add 10-33% sulfamic acid to the mixture obtained after the stirring in step (1) and continue stirring for 23-42 minutes at a stirring temperature of 25-34°C;

[0025] (3) After the stirring in step (2), vacuumize at a vacuum degree of 0.46~0.7Mpa for 19~23min, then keep warm for 4...

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PUM

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Abstract

The invention discloses a reagent for removing hydrogen in the pickling process. The reagent comprises the following components of, by mass, 12%-42% of hydroxacetic acid, 18%-95% of citric acid and 10%-40% of sulfamic acid. The reagent is added into an acid tank and can effectively and rapidly decompose hydrogen generated after the surface of a plating piece reacts with acid. In the aspect of steel rust removing, rust removing can be effectively carried out on an oxide layer on the surface of steel, and a wave state when hydrochloric acid reacts with the steel is inhibited effectively. Particularly, the pickling process of a galvanized plating piece is safe and rapid, and at the same time, a safe and environmentally friendly production environment is also provided.

Description

technical field [0001] The invention belongs to the technical field related to metal surface treatment, and in particular relates to a reagent for eliminating hydrogen in the pickling process and a preparation method thereof. Background technique [0002] Steel is the most widely used metal material in daily life, but the corrosion of steel brings huge losses. Pickling corrosion inhibitor can be used in the pickling process of metal products such as steel, circuit boards, and automobile sheet metal parts to remove rust, copper rust and other oxides on the metal surface. In the prior art, metals are usually pickled by using hydrochloric acid, sulfuric acid or a mixed acid solution compounded by the two. However, although this technology can remove oxides on the metal surface, it can also cause unnecessary severe corrosion to metal products and affect product quality. Galvanizing on the metal surface is an effective means to improve the corrosion resistance of steel plates. ...

Claims

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Application Information

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IPC IPC(8): C23G1/08
CPCC23G1/088
Inventor 方士君朱达明
Owner 宜兴大平杆塔制造有限公司
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