选钛尾矿制备搪瓷涂层及腐蚀电化学行为研究

舒明勇; 尹海英; 钟庆东

doi:10.7513/j.issn.1004-7638.2019.03.013

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选钛尾矿制备搪瓷涂层及腐蚀电化学行为研究

doi: 10.7513/j.issn.1004-7638.2019.03.013

1. 上海大学材料科学与工程学院, 上海 200444;
2. 攀枝花学院生物与化学工程学院, 四川攀枝花 617000

基金项目:

四川省重点应用基础研究项目（2016JY0230），攀枝花市产业推进项目（2015CY-G-12）。

详细信息

作者简介:
舒明勇(1979-),男,博士研究生,副教授,主要从事非金属矿产资源综合利用。

通讯作者:
钟庆东(1969-),男,教授,博士,主要从事金属电化学腐蚀相关研究,E-mail:qdzhong@shu.edu.cn。

中图分类号: TF823,TG148
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- 被引次数: 0
出版历程
- 收稿日期: 2019-02-25

Study on Electrochemical Corrosion Behaviors of Enamel Coating Prepared from Titanium Tailings

1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;
2. School of Biological and Chemical Engineering, Panzhihua University, Panzhihua 617000, Sichuan, China

摘要

摘要: 以攀枝花选钛尾矿为原料制备出搪瓷涂层，采用动电位极化曲线（Tafel）和交流阻抗谱（EIS）研究了搪瓷涂层在30% HCl溶液中的腐蚀电化学行为。研究结果表明，随着选钛尾矿加入量的增加，制备出的搪瓷涂层结构中气泡率随之增加，生成的氧化铁—铁相枝晶结构增大，相互嵌入，岛和锚状结构明显。搪瓷涂层在30% HCl溶液中的极化曲线E_corr随着尾矿加入量的增加而逐渐降低，腐蚀速度加快，耐酸性能降低。交流阻抗谱Nyquisy图高频区表现出较大半径的容抗弧，低频区出现弥散效应，低频区相角θ趋于5°，log|Z|~logf近似一条水平直线，涂层表现为高阻抗的纯电阻。因此，选钛尾矿制备搪瓷涂层的最佳加入量为8%~10%。
- 选钛尾矿 /
- 搪瓷涂层 /
- 腐蚀行为 /
- 电化学性能
Abstract: The enamel coating was prepared from the titanium tailings in Panzhihua area,and the electrochemical corrosion behaviors of the enamel coating in 30% HCl solution were studied using potentiodynamic polarization curve(Tafel) and electrochemical impedance spectroscopy(EIS).The results show that the amount of bubbles in the enamel coating and the iron oxides-iron phase dendrite structures increase,and the island and anchor structures are obviously embedded into each other,with the increase of the addition of titanium tailings.The polarization curve E_corr of the enamel coating in 30% HCl solution decreases with the increase of titanium tailings content,and the corrosion rate increases.A large radius of capacitive reactance arc is found in the high-frequency region of electrochemical impedance spectroscopy Nyquisy,and the diffusion effect can be observed in the low-frequency region where the phase angle θ is near 5° and log|Z|~logf diagram approximates to a horizontal line.The coating presents as pure resistance with high impedance.Therefore,the optimal content of titanium tailings is 8%~10%.
- titanium tailings /
- enamel coating /
- corrosion behaviors /
- electrochemical properties