Evaluation method for polymerization performance of color coated plate organic coating

An organic coating and evaluation method technology, which is applied in the field of steel anticorrosion, can solve the problems of long test cycle, affecting the efficiency of product performance evaluation, and large impact on grade evaluation, so as to shorten the test cycle, improve the efficiency of performance evaluation, and avoid the effect of impact

Active Publication Date: 2017-01-11
ANGANG STEEL CO LTD
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Problems solved by technology

[0004] (1). The test results and grade evaluation are greatly affected by objective test conditions and huma

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  • Evaluation method for polymerization performance of color coated plate organic coating
  • Evaluation method for polymerization performance of color coated plate organic coating
  • Evaluation method for polymerization performance of color coated plate organic coating

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[0019] The present invention is further illustrated by some embodiments below.

[0020] Select the color coated steel plate as the test sample, and make sample 1, sample 2 and sample 3 according to the requirements of size 150mm*75mm. Select different pretreatment time and electrolyte concentration to process the sample. After the treatment, take out the sample and conduct electrochemical AC impedance spectroscopy test under different test conditions. ZSimpWin software is used to analyze the impedance spectrum data, and the characteristic electrochemical parameters are calculated. The porosity of the organic coating of the color-coated board is divided into the polymerization performance grade of the organic coating according to the porosity of the organic coating. The test conditions, calculation results and grade evaluation results are shown in Table 2. At the same time, the test samples were subjected to conventional performance testing of organic coatings on color-coated b...

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Abstract

The invention discloses an evaluation method for the polymerization performance of a color coated plate organic coating. The method is characterized by: firstly soaking a color coated steel plate sample in an electrolyte solution to conduct pretreatment, then conducting AC impedance testing and analyzing the measured AC impedance spectrum, then performing formula computation to obtain the coating porosity, and evaluating the polymerization performance through the porosity. Specifically, the pretreatment time of the color coated steel plate sample is 60-90min, the temperature of the electrolyte solution is 23-27DEG C in the pretreatment process, the electrolyte solution is a sodium oxide aqueous solution with a concentration of 3.0-5.0% by mass percentage, and the AC impedance measurement adopts a three-electrode system, a working electrode is a to-be-tested sample, the area ratio of an auxiliary electrode to the working electrode is 2-4, the scanning speed is 0.1-1.0mV/S, the amplitude of a sine voltage signal is 10-40mV, and the scanning frequency range is 1*10<5>Hz-1*10<-2>Hz.

Description

technical field [0001] The invention belongs to the technical field of iron and steel anticorrosion, and in particular relates to a method for evaluating the performance of an organic coating on a color-coated plate. Background technique [0002] The excellent anti-corrosion and decorative properties of color-coated steel sheets are achieved by obtaining a coating with good adhesion on the surface of the substrate. The coating has good formability, corrosion resistance and decorative properties of organic polymers, among which corrosion resistance It is a performance that directly affects the service life of color-coated plates. The quality of corrosion resistance depends on whether the formed organic coating can effectively isolate the corrosive medium from the substrate or slow down the speed at which the corrosive medium reaches the substrate and causes corrosion. It penetrates into the coating through the micropores on the surface of the coating and reaches the coating / b...

Claims

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Application Information

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IPC IPC(8): G01N17/02
Inventor 王永明徐承明肖宇张宇钟彬杨洪刚胡绍伟
Owner ANGANG STEEL CO LTD
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