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Corrosion behavior and composition analysis of chromate passive film on electroless Ni-P coating

机译：化学镀Ni-P涂层铬酸盐钝化膜的腐蚀行为及成分分析

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摘要

A passive film was formed on electroless Ni-P coating (ENPC) in a bath of K_2Cr_2O_7 30 g/l. XPS and electrochemical methods were employed to analyze its chemical compositions and corrosion behaviors. The potentiodynamic polarization tests indicated the corrosion current of the passivated sample was 1/ 30 that of as-plated ENPC. The XPS analysis illustrated the film comprised Cr, Ni and O. The film thickness was evaluated to be a few nanometers according to the sputtering rate of Ar~+ ion. High-resolution XPS spectra suggested that the detected Cr in film was in the form of trivalent compounds, Cr_2O_3 and Cr(OH)_3.
机译：在K_2Cr_2O_7 30 g / l的镀液中，在化学镀Ni-P涂层（ENPC）上形成钝化膜。采用XPS和电化学方法分析其化学成分和腐蚀行为。电位动力学极化测试表明，钝化样品的腐蚀电流是电镀的ENPC的1/30。 XPS分析表明该膜包含Cr，Ni和O。根据Ar〜+离子的溅射速率，将膜厚评估为几纳米。高分辨率XPS光谱表明，薄膜中检测到的Cr是三价化合物Cr_2O_3和Cr（OH）_3的形式。

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  • 来源
    《Applied Surface Science》 |2010年第13期|p.4089-4094|共6页
  • 作者

    Songlin Mu; Ning Li; Deyu Li; Liying Xu;

  • 作者单位

    Department of applied chemistry, Harbin Institute of technology, Harbin 150001, PR China;

    Department of applied chemistry, Harbin Institute of technology, Harbin 150001, PR China;

    Department of applied chemistry, Harbin Institute of technology, Harbin 150001, PR China;

    Department of applied chemistry, Harbin Institute of technology, Harbin 150001, PR China;

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  • 正文语种 eng
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  • 关键词

    passive film; electroless Ni-P coating; corrosion behaviors; XPS analysis;

    机译：被动膜化学镀Ni-P涂层;腐蚀行为;XPS分析;

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