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Neutral deoiling derusting cleaning agent

A rust-removing cleaning agent, neutral technology, applied in the field of cleaning agents, can solve the problems of long-term storage of unfavorable products, easy decomposition and failure, unstable corrosion inhibitor, etc., to achieve stable cleaning agent, uniform rust removal, and thorough rust removal. Effect

Inactive Publication Date: 2007-01-31
北京蓝星清洗有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has led to some defects in this kind of degreasing and derusting agents: the applicable materials are limited to ferrous metals, and are not suitable for more precise small light rust components and galvanized sheets currently used in large quantities; the processing time must be strictly controlled , too long will cause excessive corrosion; the corrosion inhibitor is unstable in the acid solution, easy to decompose and fail, which is not conducive to long-term storage of the product

Method used

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  • Neutral deoiling derusting cleaning agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Preparation of cleaning agent solutions of different formulations

[0032] recipe one

[0033] Prepare 500kg product of the present invention, each component contained in it and batching amount (kg) thereof are as follows:

[0034] Component Ingredients (Kg)

[0035] HPMA 100

[0036] HEDP 25

[0037] Sodium carbonate 25

[0038] Surfactant AS 10

[0039] Thiourea 0.5

[0040] h 2 O margin

[0041] The prepared product has a pH value of about 7, a light yellow homogeneous liquid, and no suspended matter.

[0042] recipe two

[0043] Prepare 500kg product of the present invention, each component contained in it and batching amount (kg) thereof are as follows:

[0044] Component Ingredients (Kg)

[0045] HPMA 50

[0046] PAAS 100

[0047] ATMP 25

[0048] EDTMP 15

[0049] NaHCO 3 40

[0050] NaOH 10

[0051] Surfactant AS 5

[0052] Thiourea 4

[0053] h 2 O margin

[0054] The prepared product has a pH value of about 7.5,...

Embodiment 2

[0066] Embodiment 2 The example of cleaning pipelines in a circular manner

[0067] A factory newly built a circulating water device, and the pipes of the device were cleaned before being put into production. The dirt in the pipes was anti-rust oil, floating rust, etc.

[0068] Pipe volume 3m3 Material carbon steel, stainless steel, aluminum

[0069] Cleaning agent dosage

[0070] Adopt the cleaning agent 300kg of formula one preparation among the embodiment one

[0071] Passivator 60kg

[0072] cleaning process

[0073] according to figure 1 The process flow shown is cyclic cleaning.

[0074] In the drawings: 1 represents the pipeline system to be cleaned, 2 represents the circulation pump, and 3 represents the liquid distribution tank.

[0075] First, add 2.7m of water to the liquid distribution tank 3 3 , The trial operation of the circulating pump 2 will not cause evacuation, and there will be liquid return. Then add 300kg of neutral degreasing and derusting cle...

Embodiment 3

[0082] Embodiment 3 The example of cleaning galvanized sheet parts by soaking

[0083] In a VCD manufacturing enterprise, the galvanized sheet components in the VCD were rusted due to the damage of the local galvanized layer during storage, and they were treated with the cleaning agent of the present invention before use.

[0084] Prepare neutral degreasing and derusting cleaning agent according to formula two of embodiment one, and preparation contains this neutral degreasing and derusting cleaning agent weight percent and is 100 kilograms of cleaning liquids of 20%, in treatment tank, cleaning liquid is heated to 50 ℃, then immerse the parts to be cleaned in the tank, and treat them for 10-30 minutes according to the number of rust spots on the parts to be cleaned, then take them out, and then passivate them in the passivation solution for 30 minutes.

[0085] Cleaning effect: the rust spots are cleaned, no rust phenomenon occurs, and the galvanized layer is not damaged.

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Abstract

The invention provides a neutral deoiling derusting cleaning agent which comprises polymeric compound, chelating agent, inorganic salt, surface active agent, sulfourea and water. Wherein the polymeric compound is polycarboxylic acid substance, which can be maleic anhydride, polyacrylic acid, sodium polyacrylate, the chelating agent is organo-phosphine acid or EDTA substance, the organo-phosphine acids can be ATMP, EDTMP, HEDP, the inorganic salt is Na2Co3, NaiHCo3, NaOH, the surface active agent is anionic surface active agent AS or LAS. The preparing process is also disclosed.

Description

technical field [0001] The invention relates to a cleaning agent, in particular to a neutral cleaning agent for removing oil and rust. Background technique [0002] Metal processing, machinery manufacturing and other industries need to use degreasing and rust removing agents to treat the processed metal surface before spraying, electroplating, plastic spraying and other processes; some pipes, wires, plates or devices also need to be decontaminated before use. Oil for rust removal. Now various effective degreasing and derusting technologies and products have been widely used in industry. Such as: the formula of the degreasing and derusting agent provided by Chinese Patent Announcement CN 1091161A is composed of inorganic acid, organic acid, salt, corrosion inhibitor, surfactant and water; the formula provided by Chinese Patent No. 90105444. And a variety of anionic and cationic surfactants. At present, these technologies and products all have something in common: rust remo...

Claims

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Application Information

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IPC IPC(8): C11D3/37
Inventor 李德福弓宁满李桦
Owner 北京蓝星清洗有限公司
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