摘要
为改善Q235钢的抗腐蚀性能,对其进行磷酸锌磷化处理,利用SEM、XRD和电化学实验研究不同磷化温度和时间对磷酸锌涂层微观组织和腐蚀行为的影响。结果表明:磷化温度及磷化时间不会改变磷化膜的物相组成,但对磷化膜晶粒尺寸及微观形貌有较大影响,不同温度和时间下磷化膜物相主要由磷酸锌(Zn3(PO4)2·H2O)组成;随着磷化温度的增加和时间的延长磷化膜致密度增加。Q235钢的腐蚀电位在磷化后较基体有较大的提高,改善了Q235钢的耐蚀性能,其中磷化温度为75℃、磷化时间20min时,能得到均匀、致密高、耐蚀性好的磷化膜。
In order to improve the corrosion resistance of Q235 steel,phosphoric acid modification was carried out.The effects of different phosphating temperature and time on the microstructure and corrosion behavior of zinc phosphate coating were studied by SEM,XRD and electrochemical experiments.The results show that,Corrosion resistance of Q235 steel can be effectively improved by high temperature zinc phosphate modification.Phosphating temperature and time can’t change the phase composition of phosphating film but have a great influence on the grain size and micro-morphology of phosphating film.The corrosion voltage of Q235 steel after phosphating at high temperature is also higher than that of the substrate.The corrosion voltage of samples with phosphating temperature of 75℃ and modification time of 20 min is 31.1% higher than that of the substrate.
作者
齐雯涵
刘军
邓永刚
刘润清
QI Wenhan;LIU Jun;DENG Yonggang;LIU Runqing(Shenyang Ligong University,Shenyang 110159,China)
出处
《沈阳理工大学学报》
CAS
2019年第3期1-6,共6页
Journal of Shenyang Ligong University
基金
辽宁省创新人才计划项目(LR2016060)
沈阳市科技创新平台建设计划项目(18-006-0-04)
“兴辽英才”青年拔尖人才项目资助(XLYC1807096)
沈阳市双百工程重大科技研发项目(Y17-0-039)
关键词
磷化
开路电压
极化曲线
微观形貌
耐腐蚀性
phosphating
open-circuit voltage
polarization curve
microstructure
corrosion resistance
