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[目的]研究双氧水在化学镀Ni–P合金过程中对镀层结构与耐蚀性的影响，以提高Ni–P合金镀层的耐蚀性。[方法]在基础化学镀镍液中添加不同体积分数(0～1.0 mL/L)双氧水，通过测厚法分析沉积速率变化；采用金相显微镜、扫描电镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)分析了Ni–P合金镀层的表面形貌、元素组成及晶体结构；通过硝酸点滴试验和电化学测试分析了镀层的耐腐蚀性能。[结果]双氧水的加入降低了化学镀镍的沉积速率，使镀层表面胞状颗粒排列更紧密。所得Ni–P合金镀层的P质量分数均在6%～9%之间，呈非晶态结构。随着双氧水体积分数增大，镀层的耐蚀性先改善后变差，在0.6 mL/L时耐蚀性最佳。[结论]镀液添加适量双氧水可有效提高Ni–P合金镀层的耐蚀性，其作用机制与镀层致密度和磷含量密切相关。
Abstract：[Objective] The effects of hydrogen peroxide on the microstructure and corrosion resistance of electroless plated Ni–P alloy coatings were studied to improve their corrosion resistance. [Method] Different volume fractions(0-1.0 mL/L) of hydrogen peroxide were added to a basic electroless nickel plating bath. The deposition rate was analyzed by thickness measurement. The surface morphology, elemental composition, and phase structure of Ni–P alloy coatings were characterized using metallographic microscopy, scanning electron microscopy(SEM), energy-dispersive spectroscopy(EDS), and X-ray diffraction(XRD). The corrosion resistance of the coatings was evaluated through nitric acid spot test and electrochemical measurements. [Result] The addition of hydrogen peroxide reduced the deposition rate of electroless nickel plating and promoted a denser arrangement of cellular particles on the coating surface. The resulting Ni–P alloy coatings exhibited a phosphorus content in the range of 6%-9%(mass fraction) and an amorphous structure. As the volume fraction of hydrogen peroxide increased, the corrosion resistance of the coatings improved initially and then decreased, showing the best corrosion resistance at 0.6 mL/L. [Conclusion] The addition of an appropriate amount of hydrogen peroxide to the plating bath can effectively enhance the corrosion resistance of Ni–P alloy coatings, which is closely related to the coating density and phosphorus content.
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基本信息:
DOI：10.19289/j.1004-227x.2025.11.004
中图分类号:TQ153.2
引用信息:
[1]许周胜,胡光辉,潘湛昌,等.双氧水对化学镀镍-磷合金耐蚀性的影响[J].电镀与涂饰,2025,44(11):19-26.DOI:10.19289/j.1004-227x.2025.11.004.
基金信息:
广东利尔化学有限公司资助项目（24HK0215）