摘要
采用动电位极化曲线和电化学交流阻抗（EIS）技术对40℃盐酸基溶液150 g/LHCl（36%~38%）＋1.5%H2O2（30%）中430不锈钢退火氧化层的酸洗过程进行了研究。结果表明,反应电位提高有利于氧化层去除,氧化层酸洗是由电荷传递过程所控制;电容值100.5μF·cm-2和281.7μF·cm-2时氧化层在酸洗液中浸蚀并溶解,生成了疏松多孔的含水固体腐蚀产物;当电位达到约-0.466V时,时间-电位曲线趋于平稳,说明氧化层脱除过程趋于稳定,SEM形貌观察也证实氧化层已完全溶解。
The pickling process of 430 stainless steel annealing oxidation layer in 150 g/L HCl（36%-38%）＋1.5%H2O2（30%） solution at 40℃ was studied by adopted potentiodynamic polarization curve and electrochemical impedance spectroscopy（EIS）. The results show that increasing redox potential will help remove the oxide scale, the pickling process of oxide scale is controlled by the charge transfer process; capacitance 100.5 μF·cm-2and 281.7 μF·cm-2illustrate that the oxide layer is etched and dissolved in the pickling solution, thus, the porous solid corrosion product is produced; EIS reflected pickling solution can lead to pitting corrosion of the stainless steel substrate; The open potential curve tendes to be smooth after pickling for 1250 s when potential is about-0.466 V, which indicates that the pickling process of oxide scale inclines to stability. Through observation of SEM morphology, it’s found that oxide scale is dissolved completely.
出处
《热加工工艺》
CSCD
北大核心
2015年第14期210-213,共4页
Hot Working Technology
