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Anti-corrosion treatment method of workpiece for manufacturing guardrail

An anti-corrosion treatment and workpiece technology, applied in the direction of manufacturing tools, pre-treated surfaces, metal processing equipment, etc., can solve the problems of easy peeling of the surface coating, easy rust of the guardrail, etc., and achieve the effect of not easy to peel off, low brightness, and solve light pollution

Inactive Publication Date: 2019-03-29
NANJING SLOW BLESSING OUTDOOR FURNITURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a production method of an outdoor guardrail, which solves the technical problems that the guardrail is easy to rust and the surface coating is easy to peel off in the prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] An anti-corrosion treatment method for workpieces for making guardrails. The guardrails are made of stainless steel square steel, and the anti-corrosion treatment process includes the following steps:

[0023] Step 1. Carry out flat-press wire drawing treatment on the workpiece, form lines on the surface, and roughen the surface to improve the adsorption of the film formed in the subsequent process;

[0024] Step 2. Completely immerse the workpiece in 30% dilute hydrochloric acid pickling solution for 20 minutes to remove the dirt and sundries after wire drawing;

[0025] Step 3, cleaning the pickled workpiece, the cleaning time is 3 minutes;

[0026] Step 4, completely immerse the workpiece in 20% dilute phosphoric acid to form a phosphating film on the surface of the workpiece, and the phosphating time is 10 minutes. Phosphating treatment has the following effects: 1) It can improve the corrosion resistance of workpieces. Although the phosphating film is thin, becau...

Embodiment 2

[0032] An anti-corrosion treatment method for workpieces for making guardrails. The guardrails are made of stainless steel square steel, and the anti-corrosion treatment process includes the following steps:

[0033] Step 1. Carry out flat-press wire drawing treatment on the workpiece, form lines on the surface, and roughen the surface to improve the adsorption of the film formed in the subsequent process;

[0034] Step 2. Fully immerse the workpiece in a mixture of 30% dilute hydrochloric acid or 20% dilute sulfuric acid. The volume ratio of dilute sulfuric acid to dilute hydrochloric acid is 1:2. The pickling time is 230 minutes to remove the dirt after wire drawing. , debris;

[0035] Step 3, cleaning the pickled workpiece, the number of times of cleaning is three times, each cleaning is 3 minutes, and the cleaning solution is clear water.

[0036] Step 4, completely immerse the workpiece in 20% dilute phosphorus phosphate, a phosphating film is formed on the surface of th...

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Abstract

The invention discloses an anti-corrosion treatment method of a workpiece for manufacturing a guardrail. The anti-corrosion treatment method comprises the steps that the workpiece is subjected to wiredrawing treatment, and line patterns are formed on the surface of the workpiece; the workpiece is completely immersed into a pickling solution, the pickling time is 20 to 30 minutes, and dirt and impurities after wire drawing are removed; the pickled workpiece is cleaned, and the cleaning time is 3 to 5 minutes; the workpiece is completely immersed into a phosphating solution, a phosphating filmis formed on the surface of the workpiece, and the phosphating time is 10 to 30 minutes; drying is conducted, the drying temperature is 110 to 120 DEG C, and the drying time is 30 minutes; electrostatic powder spraying is conducted, a zinc coating layer is formed on the surface of the workpiece, and the thickness of the coating layer is 60 to 80 [mu]m; and baking is conducted, the baking temperature is 180 to 200 DEG C, and the baking time is 30 minutes. Through the process, a layer of high-adhesion zinc coated anti-corrosion layer with high adhesion is formed on the surface of the stainless steel workpiece and is not likely to peel off, the brightness is low, and the problem of light pollution is solved.

Description

technical field [0001] The invention relates to an anticorrosion treatment method for workpieces for making guardrails. Background technique [0002] Guardrails can be seen everywhere, which play the role of protection and isolation. Common guardrails are welded with carbon steel, and then coated with a protective layer. Because it is installed outdoors, it is exposed to the sun and rain for a long time, and it is easy to rust. Now some guardrails are made of stainless steel, which has a good anti-corrosion effect, but the surface of the stainless steel is bright and produces light pollution. Therefore, it is necessary to paint the surface of the stainless steel to form a matte layer. Because the surface of stainless steel is too smooth, the coating is easy to peel off. Contents of the invention [0003] The purpose of the present invention is to provide a production method of an outdoor guardrail, which solves the technical problems in the prior art that the guardrail is...

Claims

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Application Information

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IPC IPC(8): B05D7/14B05D1/06B05D3/10B24B19/00B05D3/02
CPCB05D7/14B05D1/06B05D3/0254B05D3/102B24B19/00
Inventor 李求海
Owner NANJING SLOW BLESSING OUTDOOR FURNITURE
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