Method for checking enamel scale explosion resistance of cold-rolled steel plate

An inspection method and technology of cold-rolled steel plates, applied in the field of inspection, can solve the problems of expensive measuring instruments and unsuitable for popularization and use, and achieve the effects of easy operation, high sensitivity, and good stability

Inactive Publication Date: 2011-09-21
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The measuring instruments used in this method are expensive, especially the test solution contains HgCl 2 and As 2 o 3 Toxic and harmful substances, should not be popularized

Method used

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  • Method for checking enamel scale explosion resistance of cold-rolled steel plate
  • Method for checking enamel scale explosion resistance of cold-rolled steel plate
  • Method for checking enamel scale explosion resistance of cold-rolled steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for testing the anti-enamel scale explosion performance of cold-rolled steel plates, the steps are as follows:

[0023] 1) Use sandpaper to grind the DC01 cold-rolled steel plate sample with a thickness d of 0.9mm to 400# on both sides, then clean it with acetone, and then clean it with absolute ethanol;

[0024] 2) Fasten the sample between the two electrolytic cells A and B through an O-ring, and the diameter of the contact surface between the sample and the electrolytic cell is 18mm;

[0025] 3) Electrolyte temperature control 30±0.5℃;

[0026] 4) Pour 0.2mol / L NaOH aqueous solution into the electrolytic cell B, so that the liquid level exceeds the upper edge of the working part of the sample by 1cm, use the Pt sheet as the cathode and the sample as the anode, and use a potentiostat to keep the sample at 0.2V (vs SCE), while the computer monitors the residual current I in the sample 0 ;

[0027] 5) When the residual current I 0 When it drops below 1.5μA,...

Embodiment 2

[0033] A method for testing the anti-enamel scale explosion performance of cold-rolled steel plates, the steps are as follows:

[0034] 1) Use sandpaper to grind the DC05 cold-rolled steel plate sample with a thickness d of 0.8mm to 400# on both sides, then clean it with acetone, and then clean it with absolute ethanol;

[0035] 2) The sample is fastened between the two electrolytic cells A and B through the O-ring, and the diameter of the contact surface between the sample and the electrolytic cell is 20mm;

[0036] 3) Electrolyte temperature control 30±0.5℃;

[0037] 4) Pour 0.2mol / L NaOH aqueous solution into the electrolytic cell B, so that the liquid level is 1cm higher than the upper edge of the working part of the sample, use Pt wire as the cathode and the sample as the anode, and use a potentiostat to keep the sample at 0.5V (vs SCE), while the computer monitors the residual current I in the sample 0 ;

[0038] 5) When the residual current I 0 When it drops below 1...

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Abstract

The invention relates to a method for checking the enamel scale explosion resistance of a cold-rolled steel plate. The method comprises the following steps of: cleaning a test sample; fastening the test sample between an electrolytic cell A and an electrolytic cell B; controlling temperature of electrolyte at 30+ / -0.5 DEG C; pouring the electrolyte into the electrolytic cell B; keeping the test sample at an oxidation potential of hydrogen by using a potentiostat when Pt and the test sample serve as a cathode and an anode respectively; when residual current falls below 1.5 microamperes, pouring another electrolyte into the electrolytic cell A; when the Pt and the test sample serve as an anode and a cathode respectively, switching on the potentiostat immediately and charging hydrogen to the test sample; and when the current of the anode is stabilized for 8 to 30 minutes, stopping the experiment and calculating to obtain a TH value. By the checking method, the equipment is simple, easy in operation and high in sensitivity and stability; moreover, an experimental solution is nontoxic, safe and environment-friendly, so a great economic benefit and an obvious social benefit are brought in.

Description

technical field [0001] The invention relates to a test method, in particular to a test method for the anti-enamel scale burst performance of a cold-rolled steel plate. Background technique [0002] When cold-rolled steel sheets are enamelled, "scale explosion" defects often occur due to the action of hydrogen. The probability of "scale explosion" defects varies greatly with different steel types. Usually, "hydrogen permeation time" is used as the performance indicator of enamel scale explosion resistance. For similar cold-rolled sheets, the longer the hydrogen permeation time, the better the enamel scale explosion resistance performance. In order to correctly select the anti-scaling cold-rolled plate and reduce the scale loss of enamel products, it is necessary to test the anti-scaling performance of the cold-rolled steel plate. [0003] The European standard EN10209-1996 discloses a test method for the resistance to scale explosion of enamel. This method uses the electroly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/28G01N33/20
Inventor 张万灵魏远征刘建容杨大可陈晓红涂元强石争鸣
Owner 武钢集团有限公司
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