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Process for treating surface of stainless steel tube

A stainless steel tube and surface treatment technology, applied in the direction of metal material coating process, etc., can solve the problems of low gloss, pollution, high labor intensity of mechanical method, etc., and achieve the effect of high surface finish and good corrosion resistance.

Active Publication Date: 2018-01-16
NINGBO ZHENHAI YONGDING FASTENER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the surface treatment process of stainless steel mainly includes three types: mechanical method, chemical method and electrochemical method. Among them, the mechanical method has the disadvantages of high labor intensity, serious pollution, reduced gloss, easy to rust, and high investment cost; Low cost and high efficiency, but still has the disadvantages of low gloss, gas overflow, ventilation equipment is required, and heating is difficult
The electrochemical method has many advantages such as long mirror gloss retention time, stable process, less pollution, low cost, good corrosion resistance, environmental protection, etc., but the electrochemical method is not suitable for the pre-treatment step

Method used

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  • Process for treating surface of stainless steel tube
  • Process for treating surface of stainless steel tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A surface treatment process for stainless steel pipes includes the following steps:

[0024] Step S1: Outer surface cleaning treatment: Place the stainless steel tube per liter with 20 parts by mass of sodium silicate, 40 parts by mass of sodium carboxymethyl cellulose, 20 parts by mass of potassium carbonate, 20 parts by mass of citric acid fatty acid glyceride, 2 parts by mass Parts of ethylenediamine polyoxyethylene polyoxypropylene block polyether, 20 parts by mass of sodium sulfate, 2 parts by mass of disodium ethylenediaminetetraacetate, 20 parts by mass of sodium percarbonate, 15 parts by mass of lauryl alcohol polyoxyethylene ether Sodium sulfate and 3 parts by mass of trimethylsilyl magnesium chloride are dissolved in the first mixed solution formed by dissolving in deionized water, and the first mixed solution is treated with ultrasonic vibration for 30 minutes. The temperature of the first mixed solution is maintained at 60°C, and then the stainless steel tube is...

Embodiment 2

[0030] A surface treatment process for stainless steel pipes includes the following steps:

[0031] Step S1: External surface cleaning treatment: The stainless steel tube is placed in a liter of 30 parts by mass of sodium silicate, 35 parts by mass of sodium carboxymethyl cellulose, 35 parts by mass of potassium carbonate, 18 parts by mass of citric acid fatty acid glycerides, 1 mass Parts of ethylenediamine polyoxyethylene polyoxypropylene block polyether, 5 parts by mass of sodium sulfate, 10 parts by mass of disodium ethylenediaminetetraacetate, 5 parts by mass of sodium percarbonate, 18 parts by mass of lauryl alcohol polyoxyethylene ether Sodium sulfate and 1 part by mass of trimethylsilyl magnesium chloride are dissolved in the first mixed solution formed by dissolving in deionized water, and the first mixed solution is treated with ultrasonic vibration for 90 minutes. The temperature of the first mixed solution is maintained at 60°C, and then the stainless steel tube is mov...

Embodiment 3

[0037] A surface treatment process for stainless steel pipes includes the following steps:

[0038] Step S1: External surface cleaning treatment: The stainless steel tube is placed in a liter of 50 parts by mass of sodium silicate, 30 parts by mass of sodium carboxymethyl cellulose, 50 parts by mass of potassium carbonate, 15 parts by mass of citric acid fatty acid glyceride, and 5 parts by mass. Parts of ethylenediamine polyoxyethylene polyoxypropylene block polyether, 15 parts by mass of sodium sulfate, 5 parts by mass of disodium ethylenediaminetetraacetate, 10 parts by mass of sodium percarbonate, 20 parts by mass of lauryl alcohol polyoxyethylene ether Sodium sulfate and 5 parts by mass of trimethylsilyl magnesium chloride are dissolved in the first mixed solution formed by dissolving in deionized water, and ultrasonically shaking for 60 minutes. The temperature of the first mixed solution is maintained at 60°C, and then the stainless steel tube is moved to 80°C. Use ultraso...

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Abstract

The invention provides a process for treating a surface of a stainless steel tube. The process comprises surface cleaning, surface oxide removal, polishing, passivation, and disinfection treatment toprepare a stainless steel tube. The process adopts combined treatment process of a chemical method and an electrochemical method to treat a stainless steel tube body, and the stainless steel tube is obtained. Compared with a single chemical or electrochemical treatment process in the prior art, the process is safe and eco-friendly, and is high in surface smoothness, compact and uniform in passivation coating, and good in corrosion resistance.

Description

Technical field [0001] The invention belongs to the technical field of metal surface treatment, and particularly relates to a surface treatment process of a stainless steel tube. Background technique [0002] my country is a big country in the production of stainless steel, with an annual output of 11 million tons of stainless steel. Because stainless steel has good corrosion resistance, stainless steel pipes are widely used in food, medicine, biology and other fields. In recent years, as people continue to pay attention to food safety issues, the food safety risks of stainless steel pipes used to convey food and drugs in the food and medicine manufacturing industry have also received more and more attention. When the stainless steel pipes are used in When the limit is exceeded, it may endanger human health. For this reason, my country issued and implemented the national food safety standard GB 9684-2011 "Stainless Steel Products" for stainless steel products in 2011, which has ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/50C23C22/78C23G1/24C23G1/08C25F3/24
Inventor 潘剑波
Owner NINGBO ZHENHAI YONGDING FASTENER
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