Method for rapidly testing corrosion resistance of coated plate

A technology of corrosion resistance performance and testing method, which is applied in the directions of weather resistance/light resistance/corrosion resistance, test material strength by applying repeated force/pulsation force, and measurement device, which can solve the problems of long test period, visual evaluation and large human error and other problems to achieve the effect of shortening the evaluation cycle and testing quickly

Inactive Publication Date: 2017-06-09
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method evaluates the corrosion resistance of coated panels, which has the disad

Method used

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  • Method for rapidly testing corrosion resistance of coated plate
  • Method for rapidly testing corrosion resistance of coated plate
  • Method for rapidly testing corrosion resistance of coated plate

Examples

Experimental program
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Embodiment 1

[0025] Apply the method provided by the present invention to test the coating sample to be tested according to the above-mentioned step a, step b, step c, and step d. Table 1 shows the main parameters and main process parameters of the anti-stone impact test of the embodiment of the present invention. The AC impedance values ​​of the embodiments of the present invention are shown in Table 2. The rating results of the conventional salt spray corrosion test are shown in Table 3.

[0026] In step a, the sample is processed into a size of 170*105mm, and the surface is clean and tidy without scratches;

[0027] In step b, the anti-stone impact test uses a multi-functional stone impact instrument, using a combination of SAE standard 90-degree collision chamber and shooting gun. The main parameters of the anti-stone impact test are shown in Table 3;

[0028] The neutral salt spray test in step c is carried out according to GB / T 10125-1997 "Artificial Atmosphere Corrosion Test-Salt ...

Embodiment 2

[0041] Apply the method provided by the present invention to carry out the rapid test of the corrosion resistance of the coated plate under 6 different processes of the coated plate sample to be tested, wherein the number 1 corresponding to the coated plate to be tested is the coated plate to be tested in the above-mentioned embodiment 1 . Table 4 shows the AC impedance value of the coating plate of the embodiment of the present invention. The rating results of conventional salt spray corrosion test of coated panels are shown in Table 5.

[0042] a Sample processing: the sample is processed into a size of 170*105mm, and the surface is clean and tidy without scratches;

[0043] b Anti-stone impact test: The anti-stone impact test uses a multi-functional stone impact instrument, using a combination of SAE standard 90-degree collision chamber and shooting gun, the impact time is 10s, the impact medium is steel shot, the steel shot is round, the diameter is 2mm, and the flow rate...

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Abstract

The invention provides a method for rapidly testing corrosion resistance of a coated plate. The method comprises the following steps: processing a test sample, performing a stone chip test, performing a neutral salt mist test and performing an electrochemical alternative-current impedance test, namely, firstly, processing a sample plate into an appropriate size, performing the stone chip test on the sample plate, putting the coated sample plate after the stone chip test into a salt mist testing tank for the neutral salt mist test, and performing the electrochemical alternative-current impedance test on the sample plate after the stone chip test and the neutral salt mist test, thereby obtaining an alternative-current impedance value. By adopting the method for testing the corrosion resistance of the coated plate, the evaluation period of corrosion resistance can be shortened, and the method is rapid in detection, accurate in result and easy to operate.

Description

technical field [0001] The invention belongs to the field of evaluating the corrosion resistance of coated plates, in particular to a method for predicting the corrosion resistance of the original coated plate by evaluating the corrosion resistance of the coated plate after rocking. Background technique [0002] Coated steel sheet is based on cold-rolled sheet, hot-dip galvanized sheet, hot-dip galvanized sheet or electro-galvanized sheet. Coated panels. [0003] The degree of metal corrosion of the coated substrate directly depends on the performance of the coating and the base metal. Therefore, a complete and systematic method for testing and evaluating the corrosion resistance of the coating must be established. At present, the test methods for evaluating the corrosion resistance of coated panels include general routine test methods, salt spray test, and humidity cabinet test. The results of these conventional accelerated corrosion tests are to evaluate the level of cor...

Claims

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Application Information

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IPC IPC(8): G01N17/02G01N3/32
Inventor 钟彬陈义庆高鹏徐承明徐小连艾芳芳李琳王永明肖宇
Owner ANGANG STEEL CO LTD
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