Unlock instant, AI-driven research and patent intelligence for your innovation.

An efficient and environmentally friendly method for descaling steel

A technology for scale and steel, applied in the field of scale removal of steel, can solve the problems of rust, chemical pollution, water eutrophication, etc., and achieve the effect of improving production efficiency, good bonding force and avoiding pollution

Active Publication Date: 2018-05-15
浙江旺达诗家具有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the waste acid treatment process is complicated, the investment is large, and the equipment maintenance cost is high, which also limits the popularization and application.
In addition, in the actual production process, due to the turnover between different processes, the steel after acid derusting and washing will not immediately enter the next painting process, but may be placed for half a day or longer. Rust will appear
[0004] After removing the scale, in order to obtain a good bonding force between the paint and the steel substrate, the common method is to increase the conventional phosphating process, and the conventional phosphating process will also produce serious chemical pollution, and the discharged rinsing solution contains phosphorus compounds, causing Eutrophication of water

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The steel is subjected to sandblasting and derusting treatment for 5 minutes; the welded part of the steel is subjected to laser derusting treatment; the steel after sandblasting and laser derusting is placed in a solution containing hexamethylenetetramine Among them, ultrasonic ash removal is used; the mass concentration of hexamethylenetetramine is 0.5%, and the working frequency of ultrasonic ash removal is 15KHz / dm 3 ; The steel after dust removal is compressed by the air compressor and the liquid carried on the surface of the workpiece is blown off with a conventional air gun; the steel after the air blowing is carried out for silanization treatment; the composition of the silanization treatment solution: the volume is 15:85 mixed with ethanol and water Add KH550 with a mass concentration of 0.3% in the liquid, and the silanization treatment time is 1min; air-blow the silanized steel; dry the air-blown steel at a drying temperature of 50 degrees; spray paint on the ...

Embodiment 2

[0037] The steel is subjected to sandblasting and derusting treatment, and the sandblasting time is 20 minutes; the welding part of the steel is subjected to laser derusting treatment; the steel after sandblasting and laser derusting is placed in a solution containing hexamethylenetetramine , using ultrasonic ash removal; the mass concentration of hexamethylenetetramine is 1.0%, and the working frequency of ultrasonic ash removal is 20KHz / dm 3 ; The steel after dust removal is compressed by the air compressor and the liquid carried on the surface of the workpiece is blown off with a conventional air gun; the steel after the air blowing is carried out for silanization treatment; the composition of the silanization treatment solution: the volume is 15:85 mixed with ethanol and water KH550 with a mass concentration of 1.5% was added to the liquid, and the silanization treatment time was 5 minutes; the silanized steel was air-blown; the air-blown steel was dried at a drying tempera...

Embodiment 3

[0039] The steel is subjected to sandblasting and derusting treatment, and the sandblasting time is 10 minutes; the welded part of the steel is subjected to laser derusting treatment; the steel after sandblasting and laser derusting is placed in a solution containing hexamethylenetetramine , using ultrasonic ash removal; the mass concentration of hexamethylenetetramine is 0.1%, and the working frequency of ultrasonic ash removal is 10KHz / dm 3 ; The steel after dust removal is compressed by the air compressor and the liquid carried on the surface of the workpiece is blown off with a conventional air gun; the steel after the air blowing is carried out for silanization treatment; the composition of the silanization treatment solution: the volume is 15:85 mixed with ethanol and water Add a silane coupling agent with a mass concentration of 0.1 to the liquid, and the silanization treatment time is 3 minutes; blow the steel after the silanization treatment; dry the steel after the air ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an efficient and environment-friendly steel oxide skin removing method. The method comprises the following steps that steel is subjected to sand blasting rust removing treatment; laser rust removing treatment is conducted on the welding position of the steel; the steel obtained after sand blasting rust removing and laser rust removing is placed in a solution containing a protective agent, a protection film is generated on the surface, and ash is ultrasonically removed; the steel obtained after ash removing is subjected to air blowing; the steel obtained after air blowing is subjected to silanization treatment, the steel obtained after silanization treatment is subjected to air blowing; the steel obtained after air blowing is dried; and paint spraying is conducted on the steel. According to the method, sand blasting rust removing and laser rust removing are combined, chemical pollution cannot be generated, and meanwhile the oxide skin removing quality and the production efficiency are high. The ultrasonic ash removing process is conducted in the solution containing the protective agent, the protection film is generated on the surface, re-rusting of the steel cannot happen when the steel is placed for a long time, ash ultrasonically removed is in an insoluble solid state and can be removed through filtering, and filter liquor containing the protective agent is circularly used.

Description

technical field [0001] The invention relates to a steel material descaling technology, in particular to an efficient and environment-friendly steel material descaling method. Background technique [0002] Steel folding chairs and steel-wood folding chairs require steel as structural material. For the sake of beauty and corrosion resistance, the steel of the finished folding chairs is sprayed with epoxy resin paint for protection and decoration. However, due to the oxide skin on the surface during the production and storage of steel, the existence of this layer of oxide skin will affect the bonding force between the paint and the steel substrate. If it is not removed, the paint will fall off after a long time. The final quality of the chair or steel-wood folding chair product is more important. [0003] There are two types of descaling: physical mechanical descaling and chemical descaling. Physical and mechanical rust removal methods include sand blasting, shot peening, hig...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B23P17/04
CPCB23P17/04
Inventor 贺俏红王春青郑精武
Owner 浙江旺达诗家具有限公司