Preparation of Different Coatings on 316 L Stainless Steel and their Corrosion Performance in Supercritical Water

被引：0
|
作者：
Wang Y.-Z. [1 ]
Gao F. [1 ]
Yang J.-Q. [2 ]
Li J. [3 ]
Zhu Y.-T. [1 ]
Fang C.-Q. [1 ]
Wang S.-Z. [2 ]
机构：
[1] Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an
[2] Key Laboratory of Thermo-Fluid Science and Engineering of MOE, Xian Jiaotong University, Xi'an
[3] Beijing Enterprises Water Group (China) Investment Limited, Beijing
来源：
Wang, Yu-Zhen (yzwang@xaut.edu.cn) | 1600年 / Zhejiang University卷 / 31期
关键词：
316 L stainless steel; Al[!sub]2[!/sub]O[!sub]3[!/sub; Coating; Corrosion; Supercritical water; TiO[!sub]2[!/sub; ZrO[!sub]2[!/sub;
D O I：
10.3969/j.issn.1003-9015.2017.05.022
中图分类号：
学科分类号：
摘要：
In order to solve corrosion problems of metal materials during supercritical water oxidation (SCWO) processes, Al2O3, ZrO2 and TiO2 coatings with thickness of 0.2 mm were prepared on the surface of 316L stainless steel by atmospheric plasma spraying (APS). Corrosion of the coated samples was evaluated in a batch reactor at 500℃ and 25 MPa with an oxygen concentration of 1000 mg·L-1 for 80 h. The adhesive strength of the coated samples was tested, and the surface and cross-section morphologies along with element distributions of fresh and corroded samples were analyzed. The results show that the adhesive strength of the Al2O3, ZrO2, and TiO2 coatings is 26.639, 24.526 and 40.607 N·mm-2, respectively. The surface morphology of Al2O3/316 L show gully erosion with many pores and cracks after being exposed in SCW, and most of the coating can be peeled off. The original dense ZrO2 coating becomes fragmented in supercritical water, and the residual thickness of the coating is ~0.15 mm. The surface morphology of TiO2 coating is relatively dense and the thickness of the coating is not decreased obviously in supercritical water. The TiO2 coating exhibits better corrosion resistance compared with the Al2O3 and ZrO2 coatings. The results provide a new approach for corrosion prevention of metal materials during SCWO processes. © 2017, Editorial Board of “Journal of Chemical Engineering of Chinese Universities”. All right reserved.
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页码：1177 / 1185
页数：8
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