Study on corrosion resistance of the BTESPT silane cooperating with rare earth cerium on the surface of aluminum-tube
来源期刊：Journal of Rare Earths2010年第1期
论文作者：肖围 满瑞林 缪畅 彭天兰
文章页码：117 - 122
摘 要：Bis-3-（triethoxysilyl）propyltetrasulfide（BTESPT） silane-rare earth cerium composite coatings on aluminum-tube were prepared at 60 °C by immersion method.The performance of composite coatings to protect the aluminum-tube against corrosion was investigated with potentiodynamic polarization curves,electrochemical impedance spectroscopy（EIS）,and salt spray test（SST）.The results of potentiodynamic polarization curves and EIS indicated that the self-corrosion current decreased by two orders of magnitude and the impedance values increased to 20 k?/cm2;the result of salt spray test showed that the anti-corrosion time increased by three times,which indicated that the corrosion resistant capability of the composite coatings was improved significantly.The scanning electron microscopy（SEM） photograph showed that the conversion coating was uniform and dense.The energy dispersive spectrometer（EDS） was used to analyse coating composition,which was mainly S,O,Si,Al and Ce.The formation and corrosion mechanism of the composite coating were also studied.
肖围1，满瑞林1，缪畅1，彭天兰2
1. School of Chemistry and Chemical Engineering,Central South University2. Institute of Research of Iron and Steel,Sha Steel Group
摘 要：Bis-3-（triethoxysilyl）propyltetrasulfide（BTESPT） silane-rare earth cerium composite coatings on aluminum-tube were prepared at 60 °C by immersion method.The performance of composite coatings to protect the aluminum-tube against corrosion was investigated with potentiodynamic polarization curves,electrochemical impedance spectroscopy（EIS）,and salt spray test（SST）.The results of potentiodynamic polarization curves and EIS indicated that the self-corrosion current decreased by two orders of magnitude and the impedance values increased to 20 k?/cm2;the result of salt spray test showed that the anti-corrosion time increased by three times,which indicated that the corrosion resistant capability of the composite coatings was improved significantly.The scanning electron microscopy（SEM） photograph showed that the conversion coating was uniform and dense.The energy dispersive spectrometer（EDS） was used to analyse coating composition,which was mainly S,O,Si,Al and Ce.The formation and corrosion mechanism of the composite coating were also studied.
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