Effect of Micro-Arc Oxidation on Corrosion Resistance of ZIRLO Alloy

被引：0

作者：

Wang, Xinghan ^{[1
]}

Zhang, Jinlong ^{[1
]}

Chen, Dipeng ^{[1
]}

Yao, Meiyi ^{[1
]}

Zeng, Qifeng ^{[2
]}

Li, Cong ^{[2
]}

Zhou, Bangxin ^{[1
]}

机构：

[1] Institute of Materials, Shanghai University, Shanghai,200072, China

[2] Shanghai Nuclear Engineering Research & Design Institute Co., Ltd, Shanghai,200233, China

来源：

Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2020年 / 49卷 / 10期

关键词：

Corrosive effects - Oxidation - Surface morphology - Corrosion resistance - Silicates - Lithium compounds - Deionized water - Electrolytes - Corrosion resistant alloys - Zircaloy - Zirconia;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The ZIRLO alloy was subjected to micro-arc oxidation treatment using a phosphate or silicate electrolyte system. XRD, SEM, TEM etc were used to study the phase composition, surface morphology and cross-sectional structure of the ceramic layer. The results show that the ceramic layer prepared in the phosphate electrolyte system and the silicate electrolyte system is mainly composed of m-ZrO2. The inner surface of the ceramic layer prepared by the phosphate electrolyte system is denser than the ceramic layer prepared by the silicate electrolyte system. A small amount of β-Zr is presented on the side of the substrate near the O/M interface in E sample (micro-arc oxidation in silicate electrolyte system). ZIRLO alloy and D (micro-arc oxidation in phosphorus electrolyte system) and E samples (micro-arc oxidation in silicate electrolyte system) were studied in static autoclave at 360℃/18.6 MPa deionized water and 360℃/18.6 MPa 0.01 mol/L LiOH aqueous solution. The corrosion weight gain double logarithmic curve results show that when samples are corroded to 250 d in 360℃/18.6 MPa deionized water, the corrosion resistance of D and E samples is similar, which is better than that of the ZIRLO alloy sample without micro-arc oxidation; When samples are corroded to 246 d in 360℃/18.6 MPa 0.01 mol/L LiOH aqueous solution, the corrosion resistance of D and E samples are close to that of ZIRLO alloy samples without micro-arc oxidation treatment or even it has harmful influence on ZIRLO alloy. With the extension of corrosion time, micro-arc oxidation has limited improvement on corrosion resistance of ZIRLO alloy. © 2020, Science Press. All right reserved.

引用

页码：3484 / 3489