Cold corrosion agent for displaying dendritic structure of 800 H nickel base corrosion resistant alloy and corrosion method

A technology of dendritic structure and corrosion-resistant alloy, applied in the field of metallographic inspection and analysis, can solve problems such as unsatisfactory erosion effect, need for electrolytic corrosion, complex configuration method, etc., achieve clear and accurate detection results, protect dendritic arms, formula simple effect

Active Publication Date: 2016-07-20
河南省信菱信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nickel-based corrosion-resistant alloy dendritic corrosion agent of the above patents requires many types of chemicals, the configuration

Method used

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  • Cold corrosion agent for displaying dendritic structure of 800 H nickel base corrosion resistant alloy and corrosion method
  • Cold corrosion agent for displaying dendritic structure of 800 H nickel base corrosion resistant alloy and corrosion method
  • Cold corrosion agent for displaying dendritic structure of 800 H nickel base corrosion resistant alloy and corrosion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First add 25ml of distilled water to the container, then add 4.0g of copper chloride, then pour in 20ml of hydrochloric acid, stir evenly and wait until the solid is completely dissolved, finally pour in 20ml of nitric acid, and stir continuously with a glass rod, that is, the configuration is successful. After the cold etchant is prepared, place it for 5 minutes before using it.

[0028] Cut a sample of 20mm×20mm×10mm from the equiaxed crystal structure on the slab, grind the sample on 150#, 400#, 600#, 1000#, 1500#, 2000# water sandpaper in turn, and then polish Use a polishing paste with a particle size of 2.5 μm on the machine to polish it into a mirror surface, and finally rinse the surface of the sample with alcohol and dry it with a hair dryer.

[0029] With the polished surface of the sample facing up, use a cotton ball dipped in cold etchant to gently wipe the polished surface for 2 seconds, and immediately rinse the sample with distilled water to observe wheth...

Embodiment 2

[0031] First add 30ml of distilled water to the container, then add 5.0g of copper chloride, then pour in 25ml of hydrochloric acid, stir evenly and wait until the solid is completely dissolved, finally pour in 25ml of nitric acid, and stir continuously with a glass rod, that is, the configuration is successful. After the cold etchant is prepared, place it for 5 minutes before using it.

[0032] Cut a sample of 20mm×20mm×10mm from the equiaxed crystal structure on the slab, grind the sample on 150#, 400#, 600#, 1000#, 1500#, 2000# water sandpaper in turn, and then polish Use a polishing paste with a particle size of 2.5 μm on the machine to polish it into a mirror surface, and finally rinse the surface of the sample with alcohol and dry it with a hair dryer.

[0033] With the polished surface of the sample facing up, use a cotton ball dipped in cold etchant to gently wipe the polished surface for 2 seconds, and immediately rinse the sample with distilled water to observe wheth...

Embodiment 3

[0035] First add 22ml of distilled water to the container, then add 4.2g of copper chloride, then pour in 23ml of hydrochloric acid, stir evenly and wait until the solid is completely dissolved, finally pour in 23ml of nitric acid, and stir continuously with a glass rod, that is, the configuration is successful. After the cold etchant is prepared, place it for 5 minutes before using it.

[0036]Cut a sample of 20mm×20mm×10mm from the equiaxed crystal structure on the slab, grind the sample on 150#, 400#, 600#, 1000#, 1500#, 2000# water sandpaper in turn, and then polish Use a polishing paste with a particle size of 2.5 μm on the machine to polish it into a mirror surface, and finally rinse the surface of the sample with alcohol and dry it with a hair dryer.

[0037] With the polished surface of the sample facing up, use a cotton ball dipped in cold etchant to gently wipe the polished surface for 2 seconds, and immediately rinse the sample with distilled water to observe whethe...

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Abstract

The invention discloses a cold corrosion agent for displaying a dendritic structure of a 800 H nickel base corrosion resistant alloy and a corrosion method, and belongs to the field of analysis of metallographic structures. The cold corrosion agent of the dendritic structure comprises the following chemical components in proportion: 4.0-6.0 g of copper chloride, 20-25 ml of hydrochloric acid, 20-25 ml of nitric acid, and 20-30 ml of distilled water. A cotton ball is used for dipping the cold corrosion agent to lightly wipe a sample inspection surface; the observation is performed while wiping; when the clear dendritic structure is generated on the inspection surface, water is immediately used for flushing away the cold corrosion agent; then, alcohol is used for flushing the sample inspection surface; finally, an air blower is used for drying; and a microscope is used for observing the dendritic structure on the sample inspection surface. The inspection method is simple in formula of the cold corrosion agent, is simple in operation procedures, and can quickly and clearly observe the solidification dendritic structure of the 800 H nickel base corrosion resistant alloy.

Description

technical field [0001] The invention belongs to the technical field of metallographic inspection and analysis, and in particular relates to a cold etchant and a corrosion method for displaying the dendrite structure of an 800H nickel-based corrosion-resistant alloy. Background technique [0002] 800H nickel-based corrosion-resistant alloy is widely used in many fields such as petroleum, chemical industry, metallurgy, environmental protection and aerospace because of its excellent corrosion resistance and excellent mechanical properties. With economic development and technological progress, 800H nickel-based corrosion-resistant The demand for alloys is increasing. Therefore, advanced iron and steel enterprises at home and abroad are gradually abandoning the traditional production process of die casting + electroslag remelting, and instead adopting advanced continuous casting processes to produce 800H nickel-based corrosion-resistant alloys. Due to the special composition of t...

Claims

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Application Information

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IPC IPC(8): C23F1/28G01N1/32
CPCC23F1/28G01N1/32
Inventor 于彦冲穆林王社斌
Owner 河南省信菱信息科技有限公司
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