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利用熔盐非电解沉积法在20钢和2Cr13不锈钢表面进行渗硅处理,借助扫描电镜分析了渗层剖面形貌和成分分布,X射线衍射仪确认物相组成,利用动态极化曲线及交流阻抗谱电化学技术评价各Fe_3Si渗层的耐H_2SO_4介质电化学腐蚀性能。结果表明,钢材表面熔盐合金化制备的Fe_3Si渗层具有优异的抗H_2SO_4介质电化学腐蚀性能;不锈钢中的Cr合金元素的存在能加快熔盐渗硅速率,有助于缺陷的减少和渗层致密性的改善,Cr合金元素共同参与形成的多元Fe_3Si型过渡族金属硅化物具有优异的腐蚀抗力。
The surface of 20 steel and 2Cr13 stainless steel was treated with siliconizing by molten salt electroless deposition method. The morphology and composition distribution of the layer were analyzed by scanning electron microscopy. The phase composition was confirmed by X-ray diffractometer. The dynamic polarization curves and AC impedance Spectral Electrochemical Technique Evaluation of Electrochemical Corrosion Resistance of H_2SO_4 in Fe_3Si Layer. The results show that the Fe 3 Si permeation layer prepared by molten salt alloying on steel surface has excellent electrochemical corrosion resistance to H 2 SO 4 media. The presence of Cr alloying elements in stainless steel can accelerate the rate of silicon infiltration and contribute to the reduction of defects and the diffusion layer The compactness improves. The multi-type Fe 3 Si transition metal silicide formed by the participation of Cr alloying elements has excellent corrosion resistance.