Method for removing surface covering of steel failure fracture

A technology of surface covering and fracture, which is applied in the field of fracture analysis of steel failure samples, can solve the problems of broken fracture morphology, toxic reagents, and incomplete cleaning, so as to protect the fracture and substrate, improve cleaning efficiency and effect, The effect of quick response

Inactive Publication Date: 2016-12-14
JIANGYIN XINGCHENG GOLD MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for removing the surface covering of steel failure fractures in view of the above-mentioned prior art, to overcome the incomplete removal, cumbersome operation, over-reaction that destroys the fracture morphology, reagents, etc. Toxic and other deficiencies

Method used

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  • Method for removing surface covering of steel failure fracture
  • Method for removing surface covering of steel failure fracture
  • Method for removing surface covering of steel failure fracture

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Experimental program
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Embodiment 2

[0045] The steps and operation methods adopted in this embodiment are the same as those in Embodiment 1. See Table 1 for the specific proportioning, time, number of repetitions, and total time.

Embodiment 3

[0047] The steps and operation methods adopted in this embodiment are the same as those in Embodiment 1. See Table 1 for the specific proportioning, time, number of repetitions, and total time.

Embodiment 4

[0049] The steps and operation methods adopted in this embodiment are the same as those in Embodiment 1. See Table 1 for the specific proportioning, time, number of repetitions, and total time.

[0050] Table 1

[0051]

[0052] As can be seen from the above table 1, the present invention has quick operation, short processing time and obvious effect.

[0053] Such as figure 2 ,3 As shown, the fracture surface of the fresh fracture sample is not covered, and the fracture source area can be seen to be dimple-shaped, and the fracture mode is ductile fracture.

[0054] Such as Figure 4 , 5 As shown, it is the SEM microscopic image of the same fracture sample in a humid corrosive atmosphere for a long time. There is a layer of covering on the surface of the fracture, so the source of the fracture cannot be judged based on the microscopic morphology of the fracture.

[0055] Such as Figure 6 As shown, the coating of the fracture was determined by energy spectroscopy to be...

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Abstract

The invention relates to a method for removing surface covering of a steel failure fracture. The method comprises the following steps: preparing a cleaning solution, wherein each 100mL of solution includes 3-10mL of pure phosphoric acid, 0.1-0.15mL of fatty alcohol polyoxyethylene ether, 0.1-0.15g of sodium dodecyl sulfonate, and the balance of deionized water; cleaning a fracture specimen by an ethanol ultrasonic method for more than 5 min; placing the fracture specimen into the cleaning solution, placing in a constant temperature water bath with temperature of 30 to 50 DEG C, and placing stirring magneton in the cleaning solution system; repeatedly cleaning until the fracture specimen shows clear metallic luster; cleaning the fracture specimen by a sodium bicarbonate solution; and cleaning the fracture specimen for more than 2 min by using ethanol ultrasonic, taking out the sample and drying. The method can conveniently and effectively remove the compact covering on the fracture surface under the condition that the fracture morphology characteristics are not damaged.

Description

technical field [0001] The invention relates to a method for removing surface coverings of steel failure fractures, and belongs to the technical field of fracture analysis of steel failure samples. Background technique [0002] As we all know, fracture is the most common and most harmful failure mode in engineering accidents of mechanical products, which is unpredictable and sudden. Through the analysis of fractured parts, it is of great significance to study the occurrence and development of fracture, find out the reasons and influencing factors of fracture, and put forward corresponding preventive measures. Any fracture will always leave some traces reflecting the fracture process and fracture mechanism on the fractured section. [0003] If the corrosion occurs in a humid atmosphere, especially if the fracture occurs under special environmental conditions, the surface of the fracture is usually covered with a layer of corrosion products. This layer of corrosion products i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/34C23G1/06C23G1/08
CPCG01N1/34C23G1/065C23G1/083G01N1/4044
Inventor 周阳张欣秦志强兰楚惠钱刚阮小江白云
Owner JIANGYIN XINGCHENG GOLD MATERIALS CO LTD
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