王玉珍¹,高芬¹,杨健乔²,李婧³,朱怡彤¹,方长青¹,王树众²

• 1:西安理工大学 印刷包装与数字媒体学院，陕西 西安 710048
• 2:西安交通大学热流科学与工程教育部重点实验室，陕西 西安 710049
• 3:北控水务(中国)投资有限公司，北京 100102

摘要(Abstract)：

针对超临界水氧化过程中材料腐蚀严重的问题，采用等离子喷涂技术在316 L不锈钢上分别喷涂约0.2 mm的Al₂O₃，ZrO₂和TiO₂涂层以提高其耐腐蚀性。采用间歇式超临界水氧化反应釜研究了各涂层试样在500℃、25 MPa、氧浓度1000 mg·L^-1条件下，连续腐蚀80 h的腐蚀特性。对各涂层试样的结合强度及腐蚀前后表面及截面的形貌、元素分布等进行了表征。结果表明， Al₂O₃、ZrO₂和TiO₂涂层的结合强度分别为26.639 N·mm^-2、24.526 N·mm^-2和40.607N·mm^-2。经腐蚀实验后， Al₂O₃涂层表面呈沟壑状，出现较多的孔洞和缝隙，涂层几乎完全脱落； ZrO₂涂层表面原平整致密涂层受到破坏，呈现断裂及碎片化涂层形貌，涂层因腐蚀变薄，剩余厚度约为0.15 mm； TiO₂涂层表面相对比较致密，涂层厚度未发现明显降低，呈现较好的耐腐蚀性能。该研究结果为超临界水氧化过程中金属材料腐蚀防控方法提供一种新思路。

关键词(KeyWords)： 超临界水;腐蚀;316L不锈钢;涂层;Al₂O₃;ZrO₂;TiO₂

Abstract:

Keywords:

基金项目(Foundation): 陕西省教育厅自然专项项目（17JK0566）。

作者(Author): 王玉珍¹,高芬¹,杨健乔²,李婧³,朱怡彤¹,方长青¹,王树众²

DOI: 10.3969/j.issn.1003-9015.2017.05.022

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