A kind of pickling additive and preparation method thereof

A technology for pickling additives and reaction tanks, which is applied in the field of metal surface treatment, can solve the problems of reducing the speed of rust removal, volatile hydrochloric acid, and fast corrosion of the substrate, and achieves the effects of reducing dosage, reducing air pollution and weakening the effect of corrosion.

Active Publication Date: 2017-12-29
江门市三清环境技术工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most commonly used pickling solution is prepared by hydrochloric acid. Hydrochloric acid has the characteristics of fast derusting speed at room temperature and low cost. However, hydrochloric acid corrodes the substrate of metal workpieces quickly. Generally, it is necessary to add corrosion inhibitors. The use of co

Method used

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  • A kind of pickling additive and preparation method thereof
  • A kind of pickling additive and preparation method thereof
  • A kind of pickling additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A novel pickling additive comprising the following components by weight ratio:

[0035]

[0036] The preparation method of pickling additive comprises the following steps:

[0037] (1) Add the required deionized water into the stainless steel reaction tank and heat to 50°C;

[0038] (2), add in the stainless steel reaction tank after fatty alcohol polyoxyethylene ether is dissolved;

[0039] (3), add in the stainless steel reaction tank after dissolving dimethyl silicone oil and fumed silica;

[0040] (4), after dissolving sodium chromate, thiourea, sodium tripolyphosphate, and dicyclohexylamine nitrite respectively, add in the stainless steel reaction tank in sequence;

[0041] (5) Add disodium edetate into the reaction tank after completely dissolving it in hot water at 50°C;

[0042] (6), sodium lauryl sulfate is added in the reaction tank after being dissolved in hot water at 100°C;

[0043] (7) Start the agitator and stir for 10 minutes before leaving the ta...

Embodiment 2

[0045] A novel pickling additive is characterized in that it comprises the following components by weight ratio:

[0046]

[0047] The preparation method of pickling additive comprises the following steps:

[0048] (1) Add the required deionized water into the stainless steel reaction tank and heat to 40°C;

[0049] (2), add in the stainless steel reaction tank after fatty alcohol polyoxyethylene ether is dissolved;

[0050] (3), add in the stainless steel reaction tank after dissolving dimethyl silicone oil and fumed silica;

[0051] (4), after dissolving sodium chromate, thiourea, sodium tripolyphosphate, and dicyclohexylamine nitrite respectively, add in the stainless steel reaction tank in sequence;

[0052] (5) Add disodium edetate into the reaction tank after completely dissolving it in hot water at 50°C;

[0053] (6), sodium lauryl sulfate is added in the reaction tank after being dissolved in hot water of 95°C;

[0054] (7) Start the agitator and stir for 10 min...

Embodiment 3

[0056] A novel pickling additive is characterized in that it comprises the following components by weight ratio:

[0057]

[0058] The preparation method of pickling additive comprises the following steps:

[0059] (1) Add the required deionized water into the stainless steel reaction tank and heat to 50°C;

[0060] (2), add in the stainless steel reaction tank after fatty alcohol polyoxyethylene ether is dissolved;

[0061] (3), add in the stainless steel reaction tank after dissolving dimethyl silicone oil and fumed silica;

[0062] (4), after dissolving sodium chromate, thiourea, sodium tripolyphosphate, and dicyclohexylamine nitrite respectively, add in the stainless steel reaction tank in sequence;

[0063] (5) Add disodium edetate into the reaction tank after completely dissolving it in hot water at 50°C;

[0064] (6), sodium lauryl sulfate is added in the reaction tank after being dissolved in hot water at 100°C;

[0065] (7) Start the agitator and stir for 10 mi...

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Abstract

The invention relates to a novel pickling additive and a preparation method thereof. The pickling additive comprises the following components by weight ratio: 1-5% of fatty alcohol polyoxyethylene ether, 3-7% of sodium lauryl sulfate, Disodium edetate 1‑3%, simethicone 3‑7%, fumed silica 0.5‑3%, sodium chromate 2‑5%, thiourea 6‑10%, sodium tripolyphosphate (Na5P3O10) 7‑15%, dicyclohexylamine nitrite 5‑10%, deionized water 35‑70%. The pickling additive of the present invention can quickly remove the scale on the steel surface, form an adsorption protective film on the steel surface, effectively suppress the escape of hydrogen chloride gas (acid mist) in the pickling process, and improve the utilization rate of hydrochloric acid; Operating environment, reducing air pollution, has good environmental benefits, and helps enterprises to achieve clean production.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a novel pickling additive and a preparation method thereof. Background technique [0002] Metal plays a very important role in modern industrial and agricultural production and economic life, but during its use, metal will suffer from different forms of damage due to the influence of the surrounding environment, the most common of which is rust. Pickling and rust removal is an essential process, which is to immerse the processed metal workpiece in acid solutions such as nitric acid, sulfuric acid, hydrochloric acid, phosphoric acid, etc., to dissolve the rust attached to the metal surface. The most commonly used pickling solution is prepared by hydrochloric acid. Hydrochloric acid has the characteristics of fast derusting speed at room temperature and low cost. However, hydrochloric acid corrodes the substrate of metal workpieces quickly. Generally, it is necessar...

Claims

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Application Information

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IPC IPC(8): C23G1/04
Inventor 徐小明
Owner 江门市三清环境技术工程有限公司
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