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首页> 外文期刊>Journal of Sol-Gel Science and Technology >High temperature oxidation resistance and corrosion properties of dip coated silica coating by sol gel method on stainless steel
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High temperature oxidation resistance and corrosion properties of dip coated silica coating by sol gel method on stainless steel

机译：溶胶凝胶法对不锈钢浸涂二氧化硅涂层的高温抗氧化性能和腐蚀性能

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摘要

Silica coating for the protection of stainless steel (SS) surfaces was prepared using tetraethoxysilane and methyltriethoxysilane as precursors via an acid-catalysed (H2SO4) sol-gel method and was deposited on fer-ritic SS AISI 430 by dip coating. The surface morphology was studied using a scanning electron microscope equipped with energy-dispersive X-ray, phase analysis was carried out by X-ray diffraction, and isothermal oxidation was carried out at 800 °C for 200 h. Corrosion properties were examined by electrochemical impedance spectroscopy and resistance polarization methods in an aqueous medium containing 3.5 wt % NaCl. The results indicated that silica coating improved high-temperature oxidation resistance of AISI 430 in chloride media.
机译：使用四乙氧基硅烷和甲基三乙氧基硅烷作为前体，通过酸催化（H2SO4）溶胶-凝胶法制备了用于保护不锈钢（SS）表面的二氧化硅涂层，并通过浸涂将其沉积在铁质SS AISI 430上。使用配备有能量色散X射线的扫描电子显微镜研究表面形态，通过X射线衍射进行相分析，并在800℃下进行等温氧化200小时。通过电化学阻抗谱法和电阻极化法在含有3.5 wt％NaCl的水性介质中检查腐蚀性能。结果表明，二氧化硅涂层改善了AISI 430在氯化物介质中的高温抗氧化性。

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