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Surface treatment process of flange bolt

A flange surface bolt and surface treatment technology, used in anti-corrosion coatings, coatings, etc., can solve the problem of limited and inferior corrosion resistance, and achieve the effect of long service life and good corrosion resistance

Inactive Publication Date: 2016-11-09
CHANGSHU CITY NO 2 STANDARD PARTS FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous rise of science and technology, the automobile industry has also continued to rise, resulting in an increasing demand for various products in the automobile industry. As one of the indispensable accessories in the automobile industry, bolts have a large demand and The required quality has been greatly improved, and flange bolts are one of the typical representatives, which are mainly used in the shock absorption system and transmission system of automobiles. Therefore, the corrosion resistance of flange bolts is required to be extremely high. The corrosion resistance treatment of the flange surface bolts is galvanized, and the corrosion resistance obtained by this process is limited, and it is no longer able to meet the increasing needs of people.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A surface treatment process for flange surface bolts, specifically comprising the following steps:

[0015] (1) Electroplating: The product is placed in the electrolytic cell for electroplating treatment. In the electroplating treatment, the product is placed on the cathode, and the nickel-zinc alloy is placed on the anode. The nickel-zinc alloy is made of a mixture of metal zinc and metal nickel, according to Mass percentage is calculated, and the content of described metal zinc accounts for 80%, and the content of described metal nickel accounts for 20%, and described electrolytic solution is the sodium hydroxide that concentration is 20g / L and sodium hydroxide that concentration is 10g / L by concentration. It is made by mixing boric acid with a concentration of 15g / L;

[0016] (2) Spraying: The corrosion-resistant coating is sprayed on the outer surface of the electroplated product by spraying. The corrosion-resistant coating is composed of zinc powder, aluminum powde...

Embodiment 2

[0019] A surface treatment process for flange surface bolts, specifically comprising the following steps:

[0020] (1) Electroplating: The product is placed in the electrolytic cell for electroplating treatment. In the electroplating treatment, the product is placed on the cathode, and the nickel-zinc alloy is placed on the anode. The nickel-zinc alloy is made of a mixture of metal zinc and metal nickel, according to Mass percentage is calculated, and the content of described metal zinc accounts for 85%, and the content of described metal nickel accounts for 15%, and described electrolytic solution is the sodium hydroxide that concentration is 18g / L, concentration is the sodium hydroxide of 10g / L and It is made by mixing boric acid with a concentration of 25g / L;

[0021] (2) Spraying: The corrosion-resistant coating is sprayed on the outer surface of the electroplated product by spraying. The corrosion-resistant coating is composed of zinc powder, aluminum powder, chromic acid...

Embodiment 3

[0024] A surface treatment process for flange surface bolts, specifically comprising the following steps:

[0025] (1) Electroplating: The product is placed in the electrolytic cell for electroplating treatment. In the electroplating treatment, the product is placed on the cathode, and the nickel-zinc alloy is placed on the anode. The nickel-zinc alloy is made of a mixture of metal zinc and metal nickel, according to Mass percent is calculated, and the content of described metallic zinc accounts for 82.5%, and the content of described metallic nickel accounts for 17.5%, and described electrolytic solution is that the sodium silicate that concentration is 14g / L, the sodium hydroxide that concentration is 15g / L and It is made by mixing boric acid with a concentration of 20g / L;

[0026] (2) Spraying: The corrosion-resistant coating is sprayed on the outer surface of the electroplated product by spraying. The corrosion-resistant coating is composed of zinc powder, aluminum powder,...

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PUM

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Abstract

The invention discloses a surface treatment process of a flange bolt. The process specifically comprises the following steps: putting a product in an electrolytic tank for electroplating treatment, wherein the electroplating treatment comprises putting the product in a cathode and putting a nickel-zinc alloy in an anode; spraying a corrosion-resistant coating to the outer surface of the electroplated product in a spraying manner, wherein the corrosion-resistant coating is composed of the following components in percentages by mass: 10-16% of zinc powder, 15-21% of aluminum powder, 12-18% of chromic acid and the balance of deionized water; and putting the sprayed bolt in a drier to be dried. By the above way, the flange bolt provided by the invention has good corrosion resistance, the corrosion resistant property of the product in humid and acidic environments and the like is improved, and the service life is long.

Description

technical field [0001] The invention relates to a surface treatment process, in particular to a surface treatment process for flange surface bolts. Background technique [0002] With the continuous rise of science and technology, the automobile industry has also continued to rise, resulting in an increasing demand for various products in the automobile industry. As one of the indispensable accessories in the automobile industry, bolts have a large demand and The required quality has been greatly improved, and flange bolts are one of the typical representatives, which are mainly used in the shock absorption system and transmission system of automobiles. Therefore, the corrosion resistance of flange bolts is required to be extremely high. The corrosion resistance treatment of the flange surface bolts is all galvanized, and the corrosion resistance obtained by this process is limited, and it is no longer able to meet the increasing needs of people. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): C25D3/56C25D5/48C09D5/10
CPCC25D3/565C09D5/103C09D5/106C25D5/48
Inventor 包正芳
Owner CHANGSHU CITY NO 2 STANDARD PARTS FACTORY