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首页> 外文期刊>Key Engineering Materials >Anticorrosion Behaviours of the TiO_2 / WO_3 Composite Photoelectrodes for 304 Stainless Steel
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Anticorrosion Behaviours of the TiO_2 / WO_3 Composite Photoelectrodes for 304 Stainless Steel

机译：304不锈钢TiO_2 / WO_3复合光电电极的耐蚀性能。

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摘要

TiO_2 is one kind of semiconductor-based photocatalyst. TiO_2 shows relatively high reactivity and chemical stability under ultraviolet (UV) light. However TiO_2 is a poor absorber of photons in visible light. In order to improve the absorption efficiency, the coatings of TiO_2/WO_3, WO_3 and TiO_2 on ITO were prepared by liquid phase deposition (LPD) and dip coating method, their microstructure, surface properties, photoelectrochemical properties are investigated in this paper. XRD results showed that the phases on the composite coatings are mainly anatase, rutile and WO_3 respectively, the SEM results showed that the coatings of TiO_2 and TiO_2/WO_3 are distributed evenly on the materials surface. The electrochemical experiment results showed that open circuit potential of TiO_2 and TiO_2/WO_3 with presence of the UV light illumination were about -343 mV and -650 mV respectively, comparatively the rest potential of 304 stainless steel is about 48 mV, which means that the TiO_2 or TiO_2/WO_3 coatings can protect 304 stainless steel from corrosion, and TiO_2/WO_3 coatings retained for a while anticorrosion even absence of UV light.
机译：TiO_2是一种基于半导体的光催化剂。 TiO_2在紫外线（UV）下显示出较高的反应性和化学稳定性。然而，TiO_2是可见光中光子的不良吸收剂。为了提高吸收效率，采用液相沉积（LPD）和浸涂法制备了ITO上的TiO_2 / WO_3，WO_3和TiO_2涂层，研究了它们的微观结构，表面性质，光电化学性质。 XRD结果表明，复合涂层的相主要为锐钛矿相，金红石相和WO_3相，SEM结果表明，TiO_2和TiO_2 / WO_3涂层均匀分布在材料表面。电化学实验结果表明，在紫外光照射下，TiO_2和TiO_2 / WO_3的开路电势分别为-343 mV和-650 mV，而304不锈钢的静止电势为48 mV，这意味着TiO_2或TiO_2 / WO_3涂层可以保护304不锈钢免受腐蚀，而TiO_2 / WO_3涂层即使在没有紫外线的情况下也能保持一段时间的耐腐蚀性能。

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