Corrosive agent and corrosion method for carbon steel and austenitic stainless steel composite material microscopic structure

A technology of austenitic stainless steel and composite materials, applied in the preparation of test samples, etc., can solve problems such as troublesome operation, and achieve the effect of easy control, simple configuration and easy operation

Inactive Publication Date: 2018-06-19
ZHENSHI GROUP EASTERN SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The corrosive agent of this method must be electrolyzed, and the operation is still relatively troublesome.

Method used

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  • Corrosive agent and corrosion method for carbon steel and austenitic stainless steel composite material microscopic structure
  • Corrosive agent and corrosion method for carbon steel and austenitic stainless steel composite material microscopic structure
  • Corrosive agent and corrosion method for carbon steel and austenitic stainless steel composite material microscopic structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Corrosive formulation:

[0039] The corrosive agent is composed of nitric acid, absolute ethanol, copper sulfate and deionized water, and the content of each component is: 0.1g of copper sulfate; 5ml of nitric acid (68% by mass concentration); 10ml of absolute ethanol; 150ml of deionized water.

[0040] Corrosive preparation:

[0041] Prepare the corrosive agent in the following order: first weigh 0.1g of copper sulfate, measure 10ml of absolute ethanol, 5ml of nitric acid (68% concentration by mass), then measure 150ml of deionized water, copper sulfate, absolute ethanol, deionized After mixing the water in the glass, use a dropper to absorb nitric acid and slowly drop it into the glass, stir it evenly with a glass rod, and let it stand for about 15 minutes before using it.

[0042] Metallographic Corrosion:

[0043] The samples were coarsely ground, finely ground, polished, washed with absolute ethanol and dried in accordance with conventional methods.

[0044] Ful...

Embodiment 2

[0047] Corrosive agent formula: The corrosive agent is composed of nitric acid, absolute ethanol, copper sulfate and deionized water. The content of each component is: 0.15g of copper sulfate; 150ml of water.

[0048] Corrosive preparation:

[0049] Prepare the etchant in the following order: first weigh 0.15g of copper sulfate, measure 15ml of absolute ethanol, 10ml of nitric acid (68% concentration by mass), then measure 150ml of deionized water, copper sulfate, absolute ethanol, deionized After mixing the water in the glass, use a dropper to absorb nitric acid and slowly drop it into the glass, stir it evenly with a glass rod, and let it stand for about 20 minutes before using it.

[0050] Metallographic Corrosion:

[0051] The samples were coarsely ground, finely ground, polished, washed with absolute ethanol and dried in accordance with conventional methods.

[0052]Fully immerse the prepared sample in the prepared etchant and corrode for about 30-60 seconds. Place the...

Embodiment 3

[0055] Corrosive formulation:

[0056] The corrosive agent is composed of nitric acid, absolute ethanol, copper sulfate and deionized water. The content of each component is: 0.2g of copper sulfate; 20ml of nitric acid (68% by mass); 15m of absolute ethanol; 200ml of deionized water.

[0057] Corrosive preparation:

[0058] Prepare the etchant in the following order: first weigh 0.2g of copper sulfate, measure 20ml of absolute ethanol, 15ml of nitric acid (68% concentration by mass), then measure 200ml of deionized water, copper sulfate, absolute ethanol, deionized After mixing the water in the glass, use a dropper to absorb nitric acid and slowly drop it into the glass, stir it evenly with a glass rod, and let it stand for about 20 minutes before using it.

[0059] Metallographic Corrosion:

[0060] The samples were coarsely ground, finely ground, polished, washed with absolute ethanol and dried in accordance with conventional methods.

[0061] Fully immerse the prepared s...

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Abstract

The invention provides a corrosive agent and a corrosion method for a carbon steel and austenitic stainless steel composite material microscopic structure. According to the corrosive agent and the corrosion method, the safety is achieved, the operability is good, the erosion effect is good, the corroded sample tissue is good in display effect, the pollution is little, and the corrosion reaction isstable. The method comprises the steps that firstly, a first corrosive agent or a second corrosive agent is prepared, wherein the content of all components of the first corrosive agent comprises 0.1-0.2g of copper sulfate, 5-25 ml of nitric acid, 5-20 ml of absolute ethyl alcohol and 150-200 ml of deionized water, and the content of all components of the second corrosive agent comprises 0.2-0.5gof copper sulfate, 5-25ml of hydrochloric acid, 5-15 ml of hydrogen peroxide and 150-200 ml of deionized water; the sample is prepared into a sample to be tested; the sample to be tested is fully immersed in the first corrosive agent or the second corrosive agent to be corroded for 15-120 seconds to obtain a roughly corroded sample; the roughly corroded sample is washed, is cleaned with alcohol after being washed, and then is blown to be dried by cold air, and metallographic corrosion is completed.

Description

technical field [0001] The invention relates to a carbon steel and austenitic stainless steel composite material microstructure corrosion agent and corrosion method. Background technique [0002] Since the advent of the composite material of carbon steel and austenitic stainless steel, due to the excellent corrosion resistance of stainless steel and the advantages of high hardness and high strength of carbon steel, the combination of these excellent properties has made it widely used in furniture, elevators, electric power , decoration and other fields. The corrosion of carbon steel is fast, and the corrosion of stainless steel is relatively slow. Nowadays, a solution such as 35% picric acid is generally used to corrode the stainless steel structure. . [0003] The Chinese patent with the application number 201610333572.0 discloses an electrolytic corrosion method for the metallographic structure of stainless steel / carbon steel clad plates. The method uses 2-10% nitric aci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/28G01N1/32
CPCC23F1/28G01N1/32
Inventor 周勇申鹏杨志春潘梦忠
Owner ZHENSHI GROUP EASTERN SPECIAL STEEL
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