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Rust removing liquid capable of preventing steel surface from being damaged by excessive acid etching

A technology of rust removal and acid etching, which is applied in the coating process of metal materials, etc., and can solve problems such as steel surface damage

Inactive Publication Date: 2020-10-30
ANHUI SHUNBANG FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a rust removal solution that can avoid damage to the steel surface due to excessive acid corrosion in view of the existing problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of descaling solution that can avoid the damage caused by excessive acid corrosion on the steel surface, the specific preparation method is as follows:

[0018] 1) According to the mass volume ratio of 0.1-0.5g:1-1.2g:3-3.5g:40-50mL, add a certain amount of PSSMA, ferric chloride hexahydrate and sodium acetate trihydrate into ethylene glycol in sequence, Stir vigorously at 350-400r / min for 30-40min, then transfer to a reaction kettle with a polytetrafluoroethylene reactor lining, react at 200-220°C for 10-12h, after the product is cooled to room temperature, use deionized Repeatedly washing with water, drying at 30-35°C for 6-7h, to obtain PSSMA-modified ferric oxide nanoparticles;

[0019] 2) In the reaction system, according to the volume ratio of tetrabutyl titanate, absolute ethanol, nitric acid and absolute ethanol as 17-20:50-55:10-13:20, tetrabutyl titanate and absolute ethanol The mixed solution is slowly and dropwise added to the mixed solution composed...

Embodiment 2

[0025] A kind of descaling solution that can avoid the damage caused by excessive acid corrosion on the steel surface, the specific preparation method is as follows:

[0026] 1) According to the mass volume ratio of 0.1-0.5g:1-1.2g:3-3.5g:40-50mL, add a certain amount of PSSMA, ferric chloride hexahydrate and sodium acetate trihydrate into ethylene glycol in sequence, Stir vigorously at 350-400r / min for 30-40min, then transfer to a reaction kettle with a polytetrafluoroethylene reactor lining, react at 200-220°C for 10-12h, after the product is cooled to room temperature, use deionized Repeatedly washing with water, drying at 30-35°C for 6-7h, to obtain PSSMA-modified ferric oxide nanoparticles;

[0027] 2) In the reaction system, according to the volume ratio of tetrabutyl titanate, absolute ethanol, nitric acid and absolute ethanol as 17-20:50-55:10-13:20, tetrabutyl titanate and absolute ethanol The mixed solution is slowly and dropwise added to the mixed solution composed...

Embodiment 3

[0033] A kind of descaling solution that can avoid the damage caused by excessive acid corrosion on the steel surface, the specific preparation method is as follows:

[0034] 1) According to the mass volume ratio of 0.1-0.5g:1-1.2g:3-3.5g:40-50mL, add a certain amount of PSSMA, ferric chloride hexahydrate and sodium acetate trihydrate into ethylene glycol in sequence, Stir vigorously at 350-400r / min for 30-40min, then transfer to a reaction kettle with a polytetrafluoroethylene reactor lining, react at 200-220°C for 10-12h, after the product is cooled to room temperature, use deionized Repeatedly washing with water, drying at 30-35°C for 6-7h, to obtain PSSMA-modified ferric oxide nanoparticles;

[0035] 2) In the reaction system, according to the volume ratio of tetrabutyl titanate, absolute ethanol, nitric acid and absolute ethanol as 17-20:50-55:10-13:20, tetrabutyl titanate and absolute ethanol The mixed solution is slowly and dropwise added to the mixed solution composed...

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Abstract

The invention discloses a rust removing liquid capable of preventing a steel surface from being damaged by excessive acid etching, and relates to the technical field of metal surface treatment. A specific method comprises the following steps of 1) preparing PSSA modified ferroferric oxide nanoparticles; 2) preparing lanthanum doped nano titanium dioxide; 3) preparing silver-lanthanum doped nanometer titanium dioxide nanometer particles; 4) carrying out modification treatment by adopting polyethyleneimine silver-lanthanum doped nanometer titanium dioxide nanoparticles; and 5) uniformly mixing raw materials to obtain a component A and a component B, and putting the components into a container bottle with a middle interlayer to obtain the required rust removing liquid. According to the provided rust removing liquid, rust on the steel surface can be efficiently removed, and depositing can be carried out on a base steel surface to form a acid-corrosion-resistant nanoparticle layer which issmooth, uniform and compact on the whole so that organic acid can be effectively prevented from carrying out acid corrosion on base steel, the hydrogen embrittlement phenomenon of the steel can be avoided, and then the damage of the rust removing liquid to the steel in the rust removing process is reduced.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a descaling solution which can avoid damage to the surface of steel due to excessive acid corrosion. Background technique [0002] Steel is easy to rust when placed outdoors or in the open air, which not only affects the appearance quality, but also affects the normal progress of painting, bonding and other processes. If it is not handled in time, it will cause scrapping of materials and unnecessary economic losses. [0003] At present, there are basically two methods for degreasing and derusting the steel surface. The traditional method is manual derusting. Specifically, manual cleaning of oil stains and rust removal with steel brushes are not only labor-intensive, but also require A lot of manpower and material resources are required, and the efficiency is low at the same time, and the rust dust caused by rust removal is flying everywhere, causing po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08C23C22/50
CPCC23C22/50C23G1/088
Inventor 苗雪峰
Owner ANHUI SHUNBANG FINE CHEM
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