Universal metallic surface silanization treating agent, preparation and use thereof
A silanization treatment, metal surface technology, applied in the direction of metal material coating process, etc., can solve problems such as failure to obtain large-scale application, economic and safety defects, system composition changes, etc., to improve practical application value, overcome Flammability and explosion hazard, strong resistance to salt spray
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[0019] Example 1: Take 10 volumes of organic solvent chloroform, 5 volumes of silane coupling agent vinyl triethoxy silane, inject 100 volumes of deionized water with pre-adjusted pH into the silane main solution, mix them uniformly, and obtain a stable Complex phase system. The temperature of the system was controlled and reacted at 30°C for 4 hours to obtain an aqueous phase containing a suitable concentration of silanol and an oil phase containing an unhydrolyzed silane coupling agent. Treat the surface of the carbon steel sample with an alkaline cleaning agent in the temperature range of 60-70℃ for 5-30 seconds, rinse with deionized water, blow dry with compressed air, and directly immerse the pretreated metal in the water phase 5 minute. Take it out and dry it at 80°C for 30 minutes. In the simulated seawater solution, the corrosion rate is 0.0117mm / a measured by the corrosion electrochemical method, and the adhesion strength with the coating is measured by GB / T5210-85 "Metho...
Example Embodiment
[0020] Example 2: Take 10 volumes of organic solvent chloroform, 5 volumes of silane coupling agent γ-aminopropyltriethoxysilane, and pour 100 volumes of deionized water with pre-adjusted pH into the silane main solution and mix them evenly , To get a stable multiphase system. The temperature of the system was controlled to react for half an hour at 30°C to obtain an aqueous phase containing a suitable concentration of silanol and an oil phase containing an unhydrolyzed silane coupling agent. Treat the surface of the carbon steel sample with an alkaline cleaning agent in the temperature range of 60-70℃ for 5-30 seconds, rinse with deionized water, blow dry with compressed air, and directly immerse the pretreated metal in the water phase 5 minute. Take it out and dry it at 60°C for 50 minutes. In the simulated seawater solution, the corrosion rate is 0.092mm / a measured by the corrosion electrochemical method, and the adhesion strength with the coating is measured by GB / T5210-85 "Me...
Example Embodiment
[0021] Example 3: Take 10 volumes of organic solvent cyclohexane, 20 volumes of silane coupling agent γ-aminopropyltriethoxysilane, and 100 volumes of deionized water with pre-adjusted pH, and mix them evenly to obtain a stable multiphase system . The temperature of the system was controlled to react for half an hour at 55°C to obtain an aqueous phase containing a suitable concentration of silanol and an oil phase containing an unhydrolyzed silane coupling agent. Treat the surface of the carbon steel sample with an alkaline cleaning agent in the temperature range of 60-70°C for 5-30 seconds, rinse it with deionized water, and dry it with compressed air for later use. While stirring, add the filler, acrylic resin and initiator to the water phase and mix well. Using air as the carrier gas, spray the obtained uniform system on the pretreated metal surface and dry it at 80°C for 30 minutes. The thickness of the coating is about 0.1mm. In the simulated seawater solution, the corrosion ...
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