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Hot-dipping aluminum-zinc alloy coated steel plate coating structure display method

A technology of hot-dip aluminum coating and display method, which is applied in the preparation of test samples, etc., can solve the problems that the coating performance of this type of steel plate cannot be predicted in advance, and the display and identification of the coating structure cannot be carried out, so as to achieve a clear and good display effect. The effect of low cost and easy procurement

Active Publication Date: 2013-01-16
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the display and identification of the coating structure cannot be carried out, the coating performance of this type of steel plate cannot be predicted in advance

Method used

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  • Hot-dipping aluminum-zinc alloy coated steel plate coating structure display method
  • Hot-dipping aluminum-zinc alloy coated steel plate coating structure display method
  • Hot-dipping aluminum-zinc alloy coated steel plate coating structure display method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0035] The selected sample is 150g / m 2 Specification of 55% Al-Zn hot-dip galvalume steel sheet sample for coating structure display. The production process of the selected sample is briefly described as follows: the composition of the plating solution is 55%Al-43.3%Zn-1.4%Si, the temperature of the plating solution is 590-610°C, the steel strip enters the plating pot through the furnace nose for immersion plating, the steel strip The temperature of entering the pot is about 610-630°C. After bypassing the sinking roller, it exits the plating pot. After passing through the stabilizing roller, it is cooled rapidly by an air knife.

[0036] Plating structure display is carried out according to the following steps:

[0037] 1. After smearing vaseline on the surface of the hot-dip galvanized steel plate to be inspected, cut a metallographic sample of 20mm×15mm by wire cutting.

[0038] 2. After clamping or inlaying the sample, grind it in the order of 180#, 400#, 800#, and 1200# ...

example 2

[0049] The selected sample is 180g / m 2 Specification of 55% Al-Zn hot-dip galvalume steel sheet sample for coating structure display. The production process of the selected sample is briefly described as follows: the composition of the plating solution is 55%Al-44.1%Zn-0.8%Si-0.05%RE (rare earth), the temperature of the plating solution is 580-600°C, and the steel strip enters the plating layer through the furnace nose. The pot is dip-coated. The temperature of the steel strip entering the pot is about 630-650°C. After bypassing the sinking roller, it exits the plating pot. After passing through the stabilizing roller, it is cooled rapidly by an air knife.

[0050] Plating structure display is carried out according to the following steps:

[0051] 1. After smearing vaseline on the surface of the hot-dip galvanized steel plate to be inspected, cut a metallographic sample of 20mm×15mm by wire cutting.

[0052] 2. After clamping or inlaying the sample, grind it in the order of ...

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PUM

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Abstract

The invention discloses a hot-dipping aluminum-zinc alloy coated steel plate coating structure display method which incudes steps of a, grinding a test sample, placing the ground test sample into acetone or absolute ethyl alcohol immediately; b, polishing with alcohol as lubricant by procedures of polishing the test sample by a polishing disc at the rotational speed ranging from 900-1000rad / min with 2.5-micrometer polishing agent for 25-25 seconds, then polishing the test sample by a polishing disc at the rotational speed ranging from 600-750 rad / min with 1.0-micrometer polishing agents or 0.5-micrometer polishing agents for 10-20 seconds, and finally polishing the test sample by a polishing disc at the rotational speed ranging from 600-700 rad / min for 5-15 seconds without polishing agents; c, corroding by procedures of etching the polished test sample in a first corrosive agent for 5-9 seconds, wiping the test sample by a second corrosive agent with a cotton ball for 5-9 seconds, cleaning the test sample with the absolute ethyl alcohol, and blowing to dry the test sample to observe the test sample. The first corrosive agent comprises, by volume percent, 0.1-0.3% of hydrofluoric acid and the balance being water; and the second corrosive agent comprises, by volume percent, 75-85% of absolute ethyl alcohol and the balance being water.

Description

technical field [0001] The invention belongs to the field of metallographic sample preparation, and more specifically relates to a method for displaying coating structures of hot-dip galvanized steel sheets. Background technique [0002] Due to the excellent corrosion resistance and heat resistance of hot-dip galvanized steel sheets, they are widely used in various fields of the national economy. In the development process of this type of steel plate, the display and identification of the coating structure is a major difficulty. Since the display and identification of the coating structure cannot be carried out, the coating performance of this type of steel plate cannot be predicted in advance. Domestic manufacturers mostly use experimental methods such as bending and ball punching to evaluate the coating properties of hot-dip galvanized steel sheets in the later stage. Therefore, it is necessary to establish an analysis method for the coating structure of hot-dip galvanize...

Claims

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Application Information

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IPC IPC(8): G01N1/32
Inventor 赵骏陈义吴安术陈容张洪俊陈述蔡晓文
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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