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Method for degreasing and purifying metal surface and special hot alkali solution

A metal surface and purification treatment technology, applied in the field of metal surface treatment, can solve the problems of threatening the health and safety of workers, poor treatment effect, uneven grinding, etc., and achieve the effects of saving chemical raw materials, preventing adsorption, and convenient operation

Active Publication Date: 2016-01-27
李春清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rust and paint removal treatment of the existing metal surface adopts pneumatic tools, electric tools or dry sandblasting process to gradually polish the paint and rust on the metal surface. Due to the grinding of pneumatic tools, electric tools or dry sandblasting process, the metal The surface is affected by concussion damage and wear, resulting in uneven grinding, and because more dry sandblasting processes are required, a large amount of dust will be generated, causing environmental pollution and threatening the health and safety of workers, and will also hinder other processes at the same time conduct
However, the existing degreasing and carbon deposition treatment effects are poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0039] The method for degreasing and purifying the metal surface in this embodiment comprises the following steps:

[0040] Before step 1), wash away the sediment and other pollutants from the metal parts. Before the metal parts are put into the tank for treatment, the sediment and other dirt of the metal parts are washed clean, and then put into the tank for four removals. This step can reduce high-pressure hot water washing and save energy.

[0041] 1) Saponification and emulsification degreasing treatment, set up a special cleaning pool, prepare a special hot alkali solution in the cleaning pool, put the metal parts into the cleaning pool for etching, and control the temperature of the hot alkali solution in the cleaning pool at 20°C , the etching time is 5-20 minutes;

[0042] 2) For derusting treatment, adjust the temperature of the hot alkali solution in the cleaning pool to 51°C and then continue to corrode. The corrosion time is 20-60 minutes;

[0043] 3) In addition...

specific Embodiment 2

[0056] The characteristics of this embodiment are: the method for degreasing and purifying the metal surface,

[0057] 1) Saponification and emulsification degreasing treatment, set up a special cleaning pool, prepare a special hot alkali solution in the cleaning pool, put the metal parts into the cleaning pool for etching, and the initial temperature of the hot alkali solution in the cleaning pool is 45°C , the etching time is 5-20 minutes;

[0058] 2) Rust removal treatment, the initial temperature of the hot alkali solution in the cleaning pool is 55°C, and the etching time is 20-60 minutes;

[0059] 3) In addition to carbon deposition and paint treatment, the temperature of the hot alkali solution in the cleaning pool is at a constant temperature of 95°C, and it is etched for 2-3 hours;

[0060] 4) Rinse treatment, after steps 1)-3), the surface grease and stains of the processed metal parts are cleaned, and the cleaned metal parts are picked up from the cleaning pool, ri...

specific Embodiment 3

[0068] The characteristics of this embodiment are: the method for degreasing and purifying the metal surface,

[0069] 1) Saponification and emulsification degreasing treatment, set up a special cleaning pool, prepare a special hot alkali solution in the cleaning pool, put the metal parts into the cleaning pool for etching, and adjust the temperature of the hot alkali solution in the cleaning pool at 50°C , the etching time is 5-20 minutes;

[0070] 2) Rust removal treatment, adjust the temperature of the hot alkali solution in the cleaning pool at 65°C and continue to etch, the etching time is 20-60 minutes;

[0071] 3) In addition to carbon deposition and paint treatment, adjust the temperature of the hot alkali solution in the cleaning pool at 90°C and continue etching for 2-3 hours;

[0072] 4) Rinse treatment, after steps 1)-3), the surface grease and stains of the processed metal parts are cleaned, and the cleaned metal parts are picked up from the cleaning pool, rinsed...

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Abstract

The invention discloses a method for degreasing treatment and purification treatment on metal surfaces and dedicated hot alkaline solution. The method includes the following steps: firstly, conducting saponification and emulsification degreasing treatment, placing metal parts into a cleaning tank to etch, controlling temperature of the hot alkaline solution in the cleaning tank at 20 DEG C to 50 DEG C, and etching time is 5-20 minutes, secondly, conducting rust cleaning, regulating the temperature of the hot alkaline solution in the cleaning tank to 51 DEG C to 65 DEG C, and keeping etching for 20 to 60 minutes, thirdly, conducting carbon deposition removal and painting treatment, regulating the temperature of the hot alkaline solution in the cleaning tank to 66 DEG C to 95 DEG C, and keeping etching for 2 to 3 hours, and finally, washing with high pressure water and drying surfaces of the metal parts with high pressure air. The dedicated hot alkaline solution is mainly of alkaline solution with potential of hydrogen (pH) 10-12. The degreasing treatment, the rust cleaning, the carbon deposition removal and the painting treatment are realized through the dedicated hot alkaline solution with different temperatures and the method is particularly suitable for metal mechanical oil way treatment, pipeline treatment, and water way treatment which can not be dredged manually. Besides, the hot alkaline solution is pollution-free.

Description

technical field [0001] The invention relates to a method for degreasing and purifying metal surfaces and a special hot alkali solution. It belongs to the field of metal surface treatment. Background technique [0002] The mechanical assembly of military equipment, aircraft, automobiles, industrial and agricultural production equipment, etc. is composed of multiple metal parts. During the production and processing of metal parts, dirt will appear on the surface of metal mechanical parts. For example, during cutting, rust prevention, stamping heat treatment, grinding, polishing, transportation and storage, metal parts will inevitably Various types of pollution, various types of grease, mineral oil (hydrocarbons), fibers, polishing paste, metal powder, sand, soap, dust, powder scale and operator residues remain on the surface of metal parts Hand sweat, hand lines, etc. These dirt are difficult to see with the naked eye, but it affects the installation and use quality of mech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/14
Inventor 彭万琨
Owner 李春清
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