Suppression effect of ultrasound on pitting corrosion of SUS304 stainless steel in various NaCl solutions

论文摘要

The pitting corrosion behavior of SUS304 stainless steel was investigated by polarization in various NaCl aqueous solutions without and with applying ultrasound（US）. The measurement was carried out at different distances from US vibrator to specimen, input powers to US vibrator, concentrations of dissolved oxygen（DO）, concentrations of NaCl, pH values and temperatures. As the result, the pitting corrosion of SUS304 stainless steel was effectively suppressed by the application of US in solutions at frequency of 19.5 kHz and input power of 8 kW/m2, attributed to the stirring effect on occluded solution in pits after removing both the corrosion products and the metallic covers, which promoted the re-passivation of pits. In case of US application, pitting corrosion was largely suppressed in solutions with higher concentration of DO and lower concentrations of Na Cl and protons at lower temperature.

论文目录

• 1 Introduction
• 2 Experiment
• 3 Results and discussion
•   3.1 Different US conditions in 3.5%solution
•   3.2 Metal cover and re-passivation
•   3.3 Different solution conditions with fixed US
• 4 Conclusions

文章来源

类型: 期刊论文

作者: WANG Rongguang

来源: Science China(Technological Sciences) 2019年04期

年度: 2019

分类: 工程科技Ⅱ辑,工程科技Ⅰ辑

专业: 金属学及金属工艺

单位: Department of Mechanical Systems Engineering, Hiroshima Institute of Technology

分类号: TG142.71;TG174.3

页码: 551-558

总页数: 8

文件大小: 989K

下载量: 21