Treatment process for removing grease from inner surface of cold rolled tube

A treatment process and inner surface technology, applied in the field of treatment technology for removing grease on the inner surface of cold-rolled pipes, can solve problems such as adverse effects of equipment, strong voltage and current, burning through pipes, etc., achieving good cleaning effect and low cleaning space requirements , the effect of improving production efficiency

Inactive Publication Date: 2011-05-04
JIANGSU WEIHUA PRECISION ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common problems are: one is the foam problem. The degreasing agent of electrolytic cleaning is alkaline and contains a certain amount of surfactant. Foam may be generated during the high-speed running of the strip steel and the rinsing after degreasing. The overflow of foam will cause damage to the environment and equipment Both cause adverse effects; The second is the short circuit problem. Electrolytic degreasing uses low voltage and strong current. Once the pipe is in contact with the plate, it may burn through the pipe, resulting in the risk of fracture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A treatment process for removing grease on the inner surface of cold-rolled pipes, comprising the following steps:

[0013] A) Dosing - according to the amount of grease on the surface of the pipe, mix surfactant, lye, solvent and water in a certain proportion;

[0014] B) Degrease---Use a pump, cleaning liquid storage tank, and quick-connect hose to connect the pipes in parallel, then add the mixed solution prepared in step A) into the cleaning liquid storage tank, and turn on the circulation pump to cycle clean the pipes ;

[0015] C) Cleaning with clean water---according to step B), replace the mixed solution with clean water for circular cleaning;

[0016] D) Blowing --- first use dry compressed air to blow off the water on the inner surface, then put the soft ball into the tube, and use the air compressor to blow it several times until it is dry.

[0017] The present invention has the following advantages: firstly, there is no short-circuit problem because the me...

Embodiment 2

[0019] A treatment process for removing grease on the inner surface of cold-rolled pipes and pipes in Example 1, the difference is that the surfactants in the mixed solution prepared in step A) include dispersants, detergents, emulsifiers and enhancers. Solvent, wherein the dispersant is sorbitan monooleate (C 24 h 44 o 6 ), coconut oil fatty acid diethanolamide [C 11 h 23 CON(CH 2 CH 2 Oh) 2 ], emulsifier is alkylphenol polyoxyethylene (10) ether [C 8 h 17 C 6 h 4 O(CH 2 CH 2 O) 10 H], the solubilizer is ethylenediaminetetraacetic acid (EDTA); the lye is sodium hydroxide or potassium hydroxide; the solvent is one or more of toluene, ethanol, o-chlorotoluene or xylene. Wherein the mass percentage ratio of surfactant, lye, solvent and water is 3% of surfactant, 5% of lye, 3% of solvent and water as the balance.

Embodiment 3

[0021] A treatment process for removing grease on the inner surface of cold-rolled pipes and pipes as in Example 1, the difference is that the mass percentage ratio of the surfactant, lye, solvent and water is 6% of surfactant, alkali Liquid 8%, solvent 3.5%, water as the balance.

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PUM

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Abstract

The invention relates to a treatment process for removing grease from the inner surface of a cold rolled tube. The process comprises the following steps of: preparing liquid, removing grease, washing with clean water and purging. The treatment process has the advantages that: as an electrolytic cleaning method is not adopted, the problem of short circuit is avoided; self-developed equipment instead of special equipment is adopted, and the requirement on washing space is low; the washing effect is good and the tube is not damaged; and a plurality of tubes can be washed simultaneously and production efficiency is greatly improved.

Description

technical field [0001] The invention relates to a surface treatment process for cold-rolled pipes, in particular to a treatment process for removing grease on the inner surface of cold-rolled pipes. technical background [0002] The pipes used in nuclear power plants must have super corrosion resistance, and the corrosion resistance of pipes depends not only on the performance of the material itself, but also on the surface properties of the material. The surface defects of the pipes greatly affect the performance of the pipes in the nuclear radiation environment. stress corrosion performance. During the production process of cold-rolled pipes, some impurities such as grease and dust always remain on the surface of cold-rolled pipes. If the surface of the cold-rolled pipe is not cleaned cleanly, during the subsequent hydrogen atmosphere heat treatment process, the residual grease will be carbonized at high temperature, causing carburization on the surface of the pipe, which...

Claims

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Application Information

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IPC IPC(8): C23G1/14
Inventor 万柏方刘奎高明张建国万捷张龙缪栋
Owner JIANGSU WEIHUA PRECISION ALLOY
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