Neutral rust removal and prevention agent, preparation method and implementation process

A rust remover and neutral technology, applied in the field of neutral rust remover and antirust agent and its preparation, can solve the problems of damage to the overall solidity of metal, the speed of rust removal cannot meet the requirements, and the temperature of rust removal treatment is high, so as to achieve strong industrial Practicality and economy, low cost, and the effect of accelerating the stripping process

Inactive Publication Date: 2017-02-08
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The strong acid rust remover not only pollutes the environment and does great harm to the human body, but also produces a "brittle" phenomenon on the metal, which damages the overall firmness of the metal
At present, there are neutral derusting agents in the market, but the derusting speed is far below the requirements, and the derusting treatment temperature is required to be high, and the product price is relatively high

Method used

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  • Neutral rust removal and prevention agent, preparation method and implementation process
  • Neutral rust removal and prevention agent, preparation method and implementation process
  • Neutral rust removal and prevention agent, preparation method and implementation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 40.1kg of water, 0.9kg of complexing agent, 0.6kg of chelating agent, and 0.3kg of dispersing agent into the reactor with stirring, and stir thoroughly to obtain liquid A; take another reactor, add 40.1kg of water, dihydroxyethylidene Mix 10kg of phosphonic acid and 3kg of sodium hydroxide to obtain liquid B; slowly pour liquid B into liquid A, then add 5 kg of sodium silicate aqueous solution with a mass fraction of 60% into the mixed liquid and stir well.

[0034] The above-mentioned complexing agent is selected from the compound of disodium edetate, sodium citrate and sodium hexametaphosphate, and the mass fraction of the three components in the neutral rust remover and antirust agent is 0.3kg.

[0035] The above-mentioned chelating agent is selected from the compound of sodium gluconate, sodium alginate and triethanolamine, wherein sodium gluconate accounts for 0.4 kg in total mass percentage, and sodium alginate and triethanolamine account for 0.1 kg in total m...

Embodiment 2

[0038] Take 26.3kg of water, 10kg of complexing agent, 0.9kg of chelating agent, and 0.5kg of dispersant into the reactor with stirring, and stir thoroughly to obtain liquid A; take another reactor, add 26.3kg of water, hydroxyethylidene diphosphine Mix 20 kg of acid and 6 kg of sodium hydroxide to obtain liquid B; slowly pour liquid B into liquid A, then add 10 kg of sodium silicate aqueous solution with a mass fraction of 40% into the mixed liquid and stir well.

[0039] The above-mentioned complexing agent is selected from the compound of disodium edetate, sodium citrate and sodium hexametaphosphate, and the mass fraction of the three components in the neutral rust remover and antirust agent is 0.33kg.

[0040] The above-mentioned chelating agent is selected from the compound of sodium gluconate, sodium alginate and triethanolamine, wherein sodium gluconate accounts for 0.4 kg in total mass percentage, and sodium alginate and triethanolamine account for 0.2 kg in total mass ...

Embodiment 3

[0043] According to the calculation of the total mass fraction, take 38.9kg of water, 1.0kg of complexing agent, 0.8kg of chelating agent, and 0.4kg of dispersant into the reactor with stirring, and stir thoroughly to obtain liquid A; take another reactor and add 38.9kg of water kg, 15 kg of hydroxyethylidene diphosphonic acid, 5 kg of sodium hydroxide, and fully stir to obtain liquid B; slowly pour liquid B into liquid A, and then add 8 kg of sodium silicate aqueous solution with a mass fraction of 40% to the mixed liquid Stir well.

[0044] The above-mentioned complexing agent is selected from the compound of disodium edetate and sodium citrate, and the mass of the two components in the neutral rust remover and antirust agent is 0.5kg.

[0045] The above-mentioned chelating agent is selected from the compound of sodium gluconate and sodium alginate, wherein the quality of sodium gluconate is 0.6kg, and the quality of sodium alginate is 0.2kg. What the above-mentioned disper...

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Abstract

The invention belongs to the technical field of metal surface rust removal and prevention, and particularly relates to a neutral rust removal and prevention agent, a preparation method and an implementation process. The neutral rust removal and prevention agent is prepared from, by weight, 10-20% of hydroxy ethidene diphosphate, 3-10% of a pH alkaline regulator, 0.2-1% of a complexing agent, 0.3-0.9% of a chelating agent, 0.1-0.5% of a dispersing agent, 5-10% of a rust remover and the balance water. The pH value of the neutral rust removal and prevention agent is 6-7. In general, the product preparation process is simple, preparation is easy, the raw materials are easy to obtain, the cost is low, efficient and thorough oil and rust removal work can be carried out in a neutral solution within a short time, no damage is caused to a base body, and the neutral rust removal and prevention agent has high industrial applicability and economical efficiency and has a wide application prospect in the corrosion prevention field in the medical instrument, fine workpiece, connector and bearing workpiece pretreatment and industrial equipment using process.

Description

technical field [0001] The invention belongs to the technical field of rust removal and antirust on metal surfaces, and in particular relates to a neutral rust removal and antirust agent, a preparation method and an implementation process. Background technique [0002] Steel corrosion has always been the main reason for the loss of steel materials, and the world's annual steel loss due to steel corrosion accounts for 20% of the total output. [0003] In the process of metal painting, rust removal makes the metal surface clean and bright, which is not only beautiful, but also creates good conditions for subsequent painting, galvanizing or passivation. On the other hand, in industrial production, many metal equipment are exposed to the air and slowly oxidize, and anti-corrosion treatment is required at this time. Descaling is the first process step prior to anticorrosion treatment. [0004] At present, the main derusting methods include mechanical derusting and chemical deru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/24C23G5/00
CPCC23G1/24C23G5/00
Inventor 衣守志郑福东孙姝娟
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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