固化温度对热镀锌板钝化膜耐腐蚀性能影响
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摘要
为进一步研究环保型钝化液耐蚀性能,本文以单宁酸粉末、氟钛酸溶液和胶体硅溶胶为原料,在p H值2~7范围,不同固化温度(0~100℃)条件下制备热浸镀锌钢板钝化膜。采用傅里叶变换红外光谱仪观察钝化膜的界面连接性,使用场发射扫描电镜、能谱分析仪和X射线光电子能谱仪研究钝化膜的微观形貌和结构,选用电化学工作站分析钝化膜的耐腐蚀性能。结果表明:固化温度100℃时,膜层厚度620 mg/m~2,此时腐蚀电位E_(corr)为184 m V,极化电阻Rp为2.13×10~6Ω/cm~2,表明在此温度下环保钝化热镀锌板耐腐蚀性能最好。
To research the corrosion resistance of environment-friendly passive solutions,tannic acid powder,a fluoro titanic acid solution,and colloidal silica were used to prepare a passive film on a hot-dip galvanized steel sheet,over a p H range of 2 ~ 7,and at different temperatures( 0 ~ 100 ℃). The interface connectivity,microstructure,and corrosion resistance of the passive film were revealed by Fourier infrared spectrometry,scanning electron microscopy,energy dispersive spectroscopy,X-ray diffraction,and an electrochemical workstation. The results show that at the optimum sintering temperature of 100 ℃,the film thickness was 620 mg / m~2,the corrosion potential Ecorr was 184 m V,and the polarization resistance Rpwas 2.13×10~6Ω·cm~(-2). This shows that the corrosion resistance of environment-friendly passive hot-dipped galvanized steel sheet is optimum at this temperature.
To research the corrosion resistance of environment-friendly passive solutions,tannic acid powder,a fluoro titanic acid solution,and colloidal silica were used to prepare a passive film on a hot-dip galvanized steel sheet,over a p H range of 2 ~ 7,and at different temperatures( 0 ~ 100 ℃). The interface connectivity,microstructure,and corrosion resistance of the passive film were revealed by Fourier infrared spectrometry,scanning electron microscopy,energy dispersive spectroscopy,X-ray diffraction,and an electrochemical workstation. The results show that at the optimum sintering temperature of 100 ℃,the film thickness was 620 mg / m~2,the corrosion potential Ecorr was 184 m V,and the polarization resistance Rpwas 2.13×10~6Ω·cm~(-2). This shows that the corrosion resistance of environment-friendly passive hot-dipped galvanized steel sheet is optimum at this temperature.
引文
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[3]徐丽萍,胡丰,杨兴亮,等.镀锌钢板无铬钝化研究新进展[J].腐独科学与防护技术,2011,23(6):535-539.XU Liping,HU Feng,YANG Xingliang,et al.The new progress of chromium-free passivating in galvanized steel[J].Corrosion science and protection technology,2011,23(6):535-539.
[4]KONG Gang,LU Jintang,WU Haijiang.Post treatment of silane and cerium salt as chromate replacers on galvanized steel[J].Journal of rare earths,2009,27(1):164-168.
[5]杨效田,李霞,杨晓伟,等.Ni60/高铝青铜多元多相复合涂层制备及其微观结构特征[J].哈尔滨工程大学学报,2016,37(3):461-467.YANG Xiaotian,LI Xia,YANG Xiaowei,et al.Preparation of multivariate multiphase composite coatings of Ni60/high aluminum bronze and its microstructure characteristics[J].Journal of Harbin Engineering University,2016,37(3):461-467.
[6]李成涛,费克勋,宋利君.Pb对690合金腐蚀行为的影响[J].哈尔滨工程大学学报,2015,36(7):1001-1005.LI Chengtao,FEI Kexun,SONG Lijun.Effect of lead on the corrosion behavior of Alloy 690[J].Journal of Harbin Engineering University,2015,36(7):1001-1005.
[7]CHO K,SHANKAR RAO V,KWON H.Microstructure and electrochemical characterization of trivalent chromium based conversion coating on zinc[J].Electrochimica acta,2007,52(13):4449-4456.
[8]PADILLA V,ALFANTAZI A.Corrosion film breakdown of galvanized steel in sulphate-chloride solutions[J].Construction and building materials,2014,66:447-457.
[9]ROUSSI E,TSETSEKOU A,SKARMOUTSOU A,et al.Anticorrosion and nanomechanical performance of hybrid organo-silicate coatings integrating corrosion inhibitors[J].Surface and coatings technology,2013,232:131-141.
[10]RYU H,SHENG Nan,OHTSUKA T,et al.Polypyrrole film on 55%Al-Zn-coated steel for corrosion prevention[J].Corrosion science,2012,56:67-77.
[11]许哲峰,梅东生,刘常升,等.热镀锌板表面单宁酸-H2Ti F6/Si O2复合涂层的防腐性能研究[J].四川大学学报:工程科学版,2011,43(2):197-201.XU Zhefeng,MEI Dongsheng,LIU Changsheng,et al.Study of anti-corrosion properties of tannic acid-H2Ti F6/Si O2composite coatings on hot-dip galvanized steel sheet[J].Journal of Sichuan University:engineering science edition,2011,43(2):197-201.