Bipolar anti-corrosive coating and preparation thereof
An anti-corrosion coating and bipolar technology, applied in the field of bi-polar anti-corrosion coating and its preparation, can solve the problems of large volume and easy occurrence of defects, and achieve the effects of good application performance, prevention of infiltration, and simple coating process
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Embodiment 1
[0050] In the present embodiment, the bipolar anti-corrosion coating of the present invention is coated on the outside of the steel pipeline, and the specific process includes:
[0051] Take 60mL of ethanol in a beaker and place it in a constant temperature water bath at 40°C; take 3g of the cationic surfactant hexadecyltrimethylammonium bromide, add it to the beaker, and keep stirring until it dissolves; take nanoparticles (such as titanium dioxide ) 3g was put into a beaker and stirred continuously, stirred at constant temperature for 2 hours, then put into a drying oven at 90°C and dried to constant weight, then ball milled for 24 hours, and passed through a 350 mesh sieve to obtain powdery positively charged nanoparticles. , the Zeta potential of the obtained powder is: 24mV;
[0052] Get 20g of S850 bisphenol A type epoxy resin (purchased from Wuxi Edison Epoxy Resin Co., Ltd.), after heating in a drying oven until it has good fluidity, take 1g of the above-mentioned posi...
Embodiment 2
[0059] In this embodiment, the bipolar anti-corrosion coating of the present invention is coated on the outside of the steel pipeline, wherein the mechanical spraying method is used to coat the cationic selective layer on the outside of the steel pipeline, and then coat it after it is fully cured. The anion-selective layer is clothed, and the thickness of the coated anion-type bipolar coating (that is, the inner layer is a cation-selective layer, and the outer layer is an anion-selective layer) is 237 μm (the thickness of the anion-selective layer is about 124 μm) , other preparation methods are basically the same as in Example 1.
[0060] The anti-corrosion performance of the coating was tested by electrochemical impedance spectroscopy (EIS). The electrochemical impedance spectroscopy was measured at the open circuit potential with CHI660C electrochemical workstation. The test frequency was 100kHz-0.01Hz and the amplitude was 20mV. The test system is a three-electrode system,...
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Abstract
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