Method for obtaining hydrogen content of galvanized plate substrate

An acquisition method and technology of galvanized sheet, which is applied in the field of galvanized sheet, high-strength steel and pickling sheet, can solve the problem that the hydrogen content of the galvanized sheet steel matrix cannot be accurately obtained, and achieve saving of processing and cost, simple and convenient, Avoid the effect of being corroded

Pending Publication Date: 2021-12-03
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The invention provides a pickling method, which does not introduce new hydrogen atoms into the substrate while removing the zinc layer o...

Method used

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  • Method for obtaining hydrogen content of galvanized plate substrate
  • Method for obtaining hydrogen content of galvanized plate substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Use a shearing machine to cut a 100mm×20mm sheet sample from the DP1180GI strip steel, and then use an industrial degreasing agent with a mass fraction of 2% at a temperature of 70°C (Pacca brand degreasing agent, model FCS-364S) to degrease the surface. Oil;

[0037] 2. After degreasing, rinse the sample with a large amount of water, then place it in an acetone solution and vibrate it ultrasonically for 10 minutes, then dry the surface and store it in a low-temperature liquid nitrogen tank for 24 hours;

[0038] 3. Use deionized water to configure pickling solution 1. The specific formula is shown in Table 1, and the prepared solution is placed in condensed water at 5°C for 5 hours;

[0039]4. After taking out the galvanized sheet from the liquid nitrogen, quickly place it in the pickling solution and soak for 80s until the zinc layer disappears completely to obtain the matrix; when the galvanized sheet is soaked, the temperature of the pickling solution is 18°C. I...

Embodiment 2

[0044] 1. Use a shearing machine to cut a 100mm×20mm sheet sample from the DP1180GI strip steel, and then use an industrial degreasing agent with a mass fraction of 3% at a temperature of 70°C to degrease the surface;

[0045] 2. After degreasing, rinse the sample with a large amount of water, then place it in an acetone solution and vibrate it ultrasonically for 10 minutes, then dry the surface and store it in a low-temperature liquid nitrogen tank for 24 hours;

[0046] 3. Use deionized water to configure pickling solution 2. The specific formula is shown in Table 1, and the prepared solution is placed in condensed water at 5°C for 5 hours;

[0047] 4. Take the galvanized sheet out of the liquid nitrogen and quickly place it in the pickling solution to soak for 60s until the zinc layer disappears completely to obtain the matrix; when the galvanized sheet is soaked, the temperature of the pickling solution is 25°C. Immediately after soaking, take out the substrate after dezin...

Embodiment 3

[0052] 1. Use a shearing machine to cut a 100mm×20mm sheet sample from the DP1180GI strip steel, and then use an industrial degreasing agent with a mass fraction of 5% at a temperature of 70°C to degrease the surface;

[0053] 2. After degreasing, rinse the sample with a large amount of water, then place it in an acetone solution and vibrate it ultrasonically for 10 minutes, then dry the surface and store it in a low-temperature liquid nitrogen tank for 24 hours;

[0054] 3. Use deionized water to configure pickling solution 3. The specific formula is shown in Table 1, and the prepared solution is placed in condensed water at 5°C for 5 hours;

[0055] 4. After taking out the galvanized sheet from liquid nitrogen, quickly place it in the pickling solution and soak for 90s until the zinc layer completely disappears to obtain the matrix; when the galvanized sheet is soaked, the temperature of the pickling solution is 40°C. Immediately after soaking, take out the dezincified subst...

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PUM

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Abstract

The invention discloses a method for acquiring the hydrogen content of a galvanized plate substrate. The method comprises the following steps of: S1, cleaning the surface of a galvanized plate, and storing the galvanized plate in liquid nitrogen for 24 hours; S2, soaking the galvanized plate treated in the step S1 in a pickling solution until a zinc layer completely disappears, taking out the galvanized plate, washing away the residual pickling solution on the surface, and placing the galvanized plate in acetone so as to carry out ultrasonic treatment, and blow-drying the galvanized plate; and S3, analyzing the hydrogen content in the galvanized plate substrate of the galvanized plate treated in the step S2 by using a TDS hydrogen analyzer. With the method adopted, the problem that the hydrogen content in the galvanized plate steel substrate cannot be accurately obtained is solved.

Description

technical field [0001] The invention belongs to the field of material analysis, and in particular relates to galvanized sheets, high-strength steels, pickled sheets, etc. The invention can reduce the hydrogen content in the matrix and reduce the occurrence rate of hydrogen embrittlement failure. Background technique [0002] Due to its excellent corrosion resistance, hot-dip galvanized high-strength steel is becoming more and more widely used in automobiles and other fields. Galvanized sheets need to use electrolyte to remove oil stains on the surface of workpieces and pickling to remove surface oxide scales. Hydrogen gas will be generated during these processes, and the generated hydrogen gas will penetrate into the galvanized sheet. Therefore, after galvanizing, heating is generally used to remove hydrogen. For high-strength steels, lower hydrogen content may lead to hydrogen embrittlement of the steel plate. Hydrogen embrittlement is mainly due to the fact that hydrogen ...

Claims

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Application Information

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IPC IPC(8): G01N1/34G01N33/2025C23G1/08C23G1/06
CPCG01N1/34G01N33/2025C23G1/088C23G1/063
Inventor 刘明亮周庆军祁庆琚吴玮巍
Owner BAOSHAN IRON & STEEL CO LTD
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