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In this paper, hydroxyl silicone prepolymer is reacted with bisphenol A epoxy resin, silicone prepared - and epoxy coatings and nano-silicon dioxide modified silicone - epoxy. Analytic method of SEM, hardness, impact strength, adhesion, flexibility, electrochemical corrosion characteristics, examines the impact of changes in the amount of organic silicon, nano-SiO2 and other properties of the coating film, found that when the ratio of the epoxy resin with silicone 2:1, the silicone-modified epoxy coating combines the excellent performance of the silicone resins and epoxy resins, both good adhesion, there are good anti-aging properties and corrosion properties. Nano-SiO2 was added a solution of silicone-modified epoxy coatings in situ polymerization of nano-silicon dioxide-modified silicone - epoxy coating. Compared with the silicone-modified epoxy coatings, nano-modified silicone - epoxy coating has excellent UV-shielding properties and anti-aging properties.

In our daily lives and national product, the role of metallic materials have accounted for the core position. The international community also has a year steelmaking capacity to measure a country's comprehensive strength of tradition. Huge usage tremendous metal corrosion. It is reported that the average energy and metal corrosion resulting in 4.2% of GNP (Gross National Product) loss of one fifth of the year. Corrosion is a chemical substance with the surrounding material or electrochemical action become a phenomenon compounds, surface properties damaged. Metal corrosion can be divided into different types, a typical method is to divide the corrosion mechanism, it can be divided into chemical corrosion, electrochemical corrosion, corrosion of physical and biological corrosion. Another method is to divide the main process according to the corrosion of metal corrosion, classified as dry etching, wet etching, dry etching organic liquid and gas corrosion, molten slag and molten metal corrosion and corrosion, industrial metal corrosion mainly wet etching and dry etching to discuss. The difference between chemical and electrochemical corrosion is the corrosion process if there is a current present. Over the past commonly used preservative treatment method phosphate treatment. Since the phosphoric acid film and more, it can be a good penetration, so that the paint is firmly bonded to the metal. So phosphating metal can greatly improve the corrosion resistance, it is a common surface treatment method. After phosphating order to obtain better results, the following common K2Cr2O7 passivation, make pinhole closed to prevent air oxidation. This is a traditional well-established process, however, produces phosphorus, chromium phosphate process waste, resulting in environmental pollution. Today, the concept of international sustainable development initiated by the pollution harmful France gradually withdraw from the stage of history, urgent need new environmentally friendly method of metal.


 

 

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