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A kind of neutral derusting passivation cleaning agent and using method thereof

A cleaning agent and passivating agent technology, applied in the field of cleaning agents, can solve the problems of inability to reduce waste liquid discharge, fast rust removal rate, etc., and achieve the effect of reducing the risk of pipeline equipment blockage, slow and uniform cleaning speed, and reducing environmental pollution.

Active Publication Date: 2022-05-20
太仓市宝马环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cleaning agent is mainly used for the production cycle of pre-painting treatment. It is mainly used for cleaning parts or cleaning lines. Its rust removal rate is fast, and the risk of blockage of pipeline equipment caused by the rapid peeling off of scale cannot be avoided. It can only achieve degreasing and rust removal in one step, and further phosphating (instead of passivation) treatment is required after cleaning, which cannot reduce the waste liquid discharge during the cleaning process, and the waste liquid contains phosphorus, and the sewage treatment is limited by the cleaning site conditions

Method used

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  • A kind of neutral derusting passivation cleaning agent and using method thereof
  • A kind of neutral derusting passivation cleaning agent and using method thereof
  • A kind of neutral derusting passivation cleaning agent and using method thereof

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Experimental program
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Effect test

Embodiment 1

[0053] The cleaning agent body of the neutral derusting passivation cleaning agent provided by the present embodiment, the formula of preparing the cleaning agent body of 1000kg is as follows: 150kg oxalic acid, 50kg EDTA, 180kg sodium carbonate, 20kg sodium dodecylbenzene sulfonate, 10kg urethane Tropine and the balance of water.

[0054] The preparation method is as follows: dissolve sodium carbonate in water, then add oxalic acid, EDTA, sodium dodecylbenzenesulfonate and utolopine and stir evenly at room temperature to obtain a light yellow uniform liquid with a pH of about 7.

Embodiment 2

[0056] The cleaning agent body of the neutral derusting and passivation cleaning agent provided in this embodiment, the formula for preparing the cleaning agent body of 1000kg is as follows: 80kg tartaric acid, 20kg oxalic acid, 120kg NTA, 130kg sodium hydroxide, 40kg TX-10, 20kg benzo triazole and the balance of water.

[0057] The preparation method is as follows: dissolve sodium hydroxide in water, then add oxalic acid, tartaric acid, NTA, TX-10 and benzotriazole and stir evenly at room temperature to obtain a light yellow uniform liquid with a pH of about 7.

Embodiment 3

[0059] The cleaning agent body of the neutral derusting and passivating cleaning agent provided in this embodiment, the formula for preparing 1000kg of the cleaning agent body is as follows: 100kg glycolic acid, 50kg HEDTA, 150kg ammonia water, 30kg JFC, 20kg thiourea and the rest of the water.

[0060] The preparation method is as follows: dissolve ammonia water in water, then add glycolic acid, HEDTA, JFC and thiourea and stir evenly at room temperature to obtain a light yellow uniform liquid with a pH of about 7.

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Abstract

The invention relates to a neutral cleaning agent for derusting and passivating, which includes a cleaning agent body. The raw material formula of the cleaning agent body includes the following components in terms of weight percentage: organic acid or a mixture of organic acid and its salt 5 ~25%, chelating agent 2.5~25%, inorganic compound 6~25%, surfactant 0.2~5%, corrosion inhibitor 0.2~2% and the rest water; among them, the organic acid is oxalic acid, formic acid, malic acid, One or more combinations of citric acid, maleic acid, tartaric acid, glycolic acid, lactic acid, glycine, and adipic acid; the salt is one or more of potassium salts, sodium salts, ammonium salts, and organic ammonium salts In combination, the chelating agent is an aminocarboxyl complexing agent. Use this neutral derusting and passivating cleaning agent to clean the parts to be cleaned slowly and evenly, greatly reducing the risk of scale peeling and pipeline equipment blockage. The corrosion of equipment of various materials is small, and it can also be passivated in one step at the same time to further reduce the amount of waste liquid generated during the cleaning process and reduce environmental pollution during the cleaning process.

Description

technical field [0001] The invention belongs to the technical field of cleaning agents, and relates to a neutral rust-removing and passivating cleaning agent and a using method thereof. Background technique [0002] Conventional chemical cleaning generally uses a relatively single strong acid or weak acid for rust removal, including hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid, citric acid, sulfamic acid or a compound with other compounds, most of which are used in cleaning applications. It is acidic and corrosive to a certain extent. It is necessary to add a corrosion inhibitor to reduce the corrosion of equipment materials during the cleaning process. These formulas can meet the needs of conventional chemical cleaning, but they must be guided by professionals, otherwise problems such as excessive corrosion or hydrogen embrittlement of materials will occur due to improper application of corrosion inhibitors; rinsing and passivation are g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/26C23C22/68
CPCC23G1/26C23C22/68
Inventor 余言虎马志刚陈许清陈动张建
Owner 太仓市宝马环境工程有限公司