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Development of high temperature anti- corrosion coatings

Author: LaiZuo
Tutor: TangShaoZuo
School: Hunan University
Course: Materials Science
Keywords: TEOS TEOS Temperature anti-corrosion coating Silicone resin coupling agent
CLC: TQ637
Type: Master's thesis
Year: 2002
Downloads: 866
Quote: 6
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Abstract


Summary of the thesis the temperature overview of the development of anti-corrosion coatings and coating systems , a detailed study of the zinc-rich primer CKS ethyl silicate hydrolysis kinetics process and mechanism of the coupling agent and a silicone resin , inorganic aggregate of metal base temperature and the impact of the anti-corrosion coating . N TEOS hydrolysis process studied the kinetics and temperature of the hydrolysis reaction , the TEOS concentration , catalyst concentration, to hydrolysis reaction , while the performance of the dry gel using a differential thermal , infrared spectroscopy, X ray spectra are analyzed to determine the optimum conditions of the hydrolysis of the TEOS : at 70 ° C , PH = 1 to 2 is within a certain time , butyl acetate, ethylene glycol butyl ether , n- butanol TEOS was added dropwise a mixture of 1 to 2 drops / sec . When the hydrolyzate is clear and transparent , and save up to 4 months old . Coupling agent , coating thickness , the aggregate selection of the properties of the coating as well as the bottom of the coating of zinc powder slurry preservation and preparation were investigated in the process of producing metal base temperature anticorrosion coating . Studies : when brushing three-layer coating and the coating thickness of 105 ~ 110μm , has a good temperature corrosion resistance; select scaly mica iron oxide and an inorganic ceramic material as an intermediate coating and surface coating of orthopedic effectively prevent the erosion of the corrosive medium and can improve the temperature resistance of the coating . Before the paint brush , the 602 -type coupling agent is formulated into a solution of 2 % of the alcohol is directly coated on a substrate can improve adhesion of the coating , temperature resistance and corrosion resistance . The preparation of metal - based high temperature corrosion resistant coatings have good thermal shock resistance and performance of the long-term temperature resistance up to 700 ° C , and erosion resistance to various chemicals . In addition, the study coating anti - corrosion mechanism . The analysis pointed out that the : bricks resin having such a special structure of the R-Si-O-Si-R , so that both having inorganics and organics nature . As the temperature increases , the more complete the association between the Si-OH , so that the coating is sufficiently cured , the coating film has excellent properties of temperature corrosion critical .

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CLC: > Industrial Technology > Chemical Industry > Paint Industry > Special paints
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