Effects of KI on the Corrosion Resistance of Electroless Ni-P Plating Coating on Aluminum Alloy

doi:10.3696/j.issn.1672-6952.2010.03.012

Journal of Liaoning Petrochemical University ›› 2010, Vol. 30 ›› Issue (3): 44-47.DOI: 10.3696/j.issn.1672-6952.2010.03.012

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Effects of KI on the Corrosion Resistance of Electroless Ni-P Plating Coating on Aluminum Alloy

LIANG Ping, ZHANG Yun-xia

Liaoning Shihua University, Fushun Liaoning 113001, P.R. China

Received:2010-03-25 Published:2010-09-25 Online:2017-07-05

碘化钾对铝合金表面化学镀镍耐蚀性的影响

梁平,张云霞

辽宁石油化工大学,辽宁抚顺113001

作者简介:梁平(1974-),男,辽宁沈阳市,讲师,博士。

Abstract

Abstract:

The effect of KI on the surface micrograph of electroless Ni-P coating for 2024 aluminum alloy was observed using scanning electron microscopy (SEM), and corrosion resistance of Ni-P coating in 3.5%NaCl solution was investigated by immersion, potendynamic polarization curves and electrochemical impedance spectroscopy(EIS). The experimental results show that KI reduces the amount of defect such pole in Ni-P coating, and the crystal grain becomes finer. The surface morphology of Ni-P coating gets more homogenous and smoother. Moreover, the phosphorus content of Ni-P coating is increased by KI. Both factors contribute to a better corrosion resistance for Ni-P coating in 3.5% NaCl solution.

Key words: Aluminum alloy , Electroless plating , KI , , Corrosion resistance

摘要： 通过扫描电子显微镜考察了碘化钾(KI)对2024铝合金表面化学镀Ni-P层表面形貌的影响,采用
浸泡法和动电位极化以及交流阻抗等电化学方法,研究了KI对Ni-P镀层在质量分数为3.5%的NaCl溶液中腐蚀
行为的影响。实验结果表明,KI减少了Ni-P镀层中表面缺陷的数量,细化了晶粒,镀层更加平整致密,表面质量得
到改善。同时,KI也增加了镀层中磷的质量分数。这两个原因使Ni-P镀层的耐蚀性进一步提高。

关键词: 铝合金 , 化学镀 , , , 碘化钾 , 耐蚀性

LIANG Ping, ZHANG Yun-xia. Effects of KI on the Corrosion Resistance of Electroless Ni-P Plating Coating on Aluminum Alloy[J]. Journal of Liaoning Petrochemical University, 2010, 30(3): 44-47.

梁平,张云霞. 碘化钾对铝合金表面化学镀镍耐蚀性的影响[J]. 辽宁石油化工大学学报, 2010, 30(3): 44-47.

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Effects of KI on the Corrosion Resistance of Electroless Ni-P Plating Coating on Aluminum Alloy

碘化钾对铝合金表面化学镀镍耐蚀性的影响

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