Method for treating and cleaning corroded and oxidized surface defects

A defect treatment and defect technology, applied in the direction of using liquid cleaning methods, cleaning methods and utensils, chemical instruments and methods, etc., can solve the problems of scratching the surface of the fracture, not wiping, bumping, etc., to achieve simple and convenient operation and retention. The original appearance and the effect of improving the cleaning effect

Pending Publication Date: 2022-05-27
NANJING IRON & STEEL CO LTD
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  • Abstract
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Problems solved by technology

[0003] However, in the actual analysis work, it is inevitable to bruise and scratch the fracture surface.
In order to prevent foreign matter such as fluff from being rubbed on the rough fracture surface, neither wipe the surface of the fracture with a rag, nor wrap the fracture with cotton, and it is difficult to clean the cotton and wool fabrics scraped on the fracture during the subsequent cleaning of the fracture It will also contaminate the experimental equipment in the subsequent analysis
[0004] Considering the many defects in the existing defect fracture treatment and cleaning methods, people have made improvements in many aspects, such as storing the defect samples in a dry or vacuum chamber in time to prevent corrosion, and using grease sealing to protect the defect surface, etc. , but the effect is still unsatisfactory

Method used

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  • Method for treating and cleaning corroded and oxidized surface defects
  • Method for treating and cleaning corroded and oxidized surface defects

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Embodiment Construction

[0024] The present embodiment provides a method for treating and cleaning surface defects of corrosion and oxidation, applied to a plate Q345 specimen, the surface of which has obvious crack defects.

[0025] First place the defective specimen in 20% HCl solution and then take it out (soaking time is 5 minutes), rinse with water and then put it into 1% NaOH solution to soak (soaking time 3 minutes), rinse with water, and then use the ultrasonic cleaning machine to deeply clean the specimen, the specific operation is as follows: the beaker is loaded with anhydrous ethanol solution, and the liquid level in the beaker is higher than the surface of the fractured specimen before use, that is, the defective surface is immersed in the absolute ethanol solution Then put the beaker containing the defective specimen into the cleaning tank, inject a certain amount of distilled water into the cleaning tank, and confirm that the water level in the tank reaches one-third of the height of the tank...

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Abstract

The invention discloses a method for treating and cleaning corroded and oxidized surface defects, which relates to the technical field of steel production, and comprises the following steps: soaking a defective sample in an HCl solution, taking out, washing with clear water, soaking in a NaOH solution, washing with clear water, and deeply cleaning the sample by using an ultrasonic cleaning machine. The method is simple and convenient to operate, low in time consumption and high in experiment efficiency, and is an effective method for treating and cleaning the corrosion and oxidation defect sample.

Description

Technical field [0001] The present invention relates to the field of steel production technology, in particular to a method of treating and cleaning surface defects of corrosion and oxidation. Background [0002] In the analysis of product defects and failures, the occurrence and development process of material fracture has an important correspondence with the fracture morphology, and the cause of fracture of the material can be inferred according to the conditions of material fracture and the morphological characteristics of the fracture. To maintain the original state of the fracture, especially after the mechanical component break failure, the component section will often be abrasive and rusty, so in the analysis process, we should pay great attention to the protection of the fracture, and should be sampled and analyzed as soon as possible. [0003] However, in actual analysis work, it is inevitable that the surface of the fracture will be bruised and abraded. In order to prev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/30G01N1/34B08B3/12C23G1/02C23G1/08C23G1/14C23G1/19
CPCG01N1/30G01N1/34B08B3/12C23G1/08C23G1/19C23G1/02C23G1/14
Inventor 卞欣张华伟陈远姝雍太平
Owner NANJING IRON & STEEL CO LTD
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