超薄316L不锈钢基材表面微/纳米孔制备工艺研究

Preparation of Micro/Nano Pores on the Surface of Ultra-Thin 316L Stainless Steel Substrate

为提高涂层与超薄316L不锈钢(316L SS)材料的结合强度,在高氯酸和乙二醇电解液中对0.1 mm厚的超薄316L SS材料进行阳极氧化,在其表面形成纳米级微孔结构,并利用X射线衍射仪及扫描电子显微镜观察316L SS的微观形态与结构。结果表明:当电解液中高氯酸体积分数为2.0%、乙二醇体积分数为98.0%,氧化温度为4℃,氧化电压为30 V,氧化时间为10 min时,所得到的不锈钢薄片表面纳米孔阵列明显且连续。阳极氧化前后316L SS样品的特征衍射峰几乎一致,且阳极氧化后其耐腐蚀性更好。微/纳米孔有利于316L SS样品表面形成均匀致密的涂层,提高涂层与基体的结合强度。

To improve the bonding strength of the coating with ultra-thin 316L stainless steel(316L SS)material,the ultra-thin 316L stainless steel material(0.1 mm thickness)was anodized in perchloric acid and glycol electrolyte,and the nano-scale microporous structure was successfully obtained on the surface of 316L sheet.The morphology and microstructure of 316L SS were investigated by XRD and SEM.The results show that:the micropores on the surface of the obtained stainless steel sheet are obvious and continuous when the volume fraction of perchloric acid in the electrolyte is 2.0%,the volume fraction of ethylene glycol is 98.0%,the oxidation temperature is 4℃,the oxidation potential is 30 V,and the anodizing time is 10 min.The characteristic diffraction peaks of 316L SS samples are almost the same before and after anodic oxidation,and the corrosion resistance of the samples after anodic oxidation is better.Micro/nano pores are beneficial to the formation of uniform and compact coatings on the surface of 316L SS samples,and improve the bonding strength between coatings and substrate..