Influence of pretreatment on property of electroless plating of Ni-P on aluminum surface

CIESC Journal ›› 2010, Vol. 61 ›› Issue (12): 3200-3204.

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Influence of pretreatment on property of electroless plating of Ni-P on aluminum surface

SUN Hua,MA Hongfang, LIU Kegao，LIU Yi

Online:2010-12-05 Published:2010-12-05

前处理工艺对铝基Ni-P化学镀层性能的影响

孙华，马洪芳，刘科高，刘义

山东建筑大学材料科学与工程学院，山东济南 250101

Abstract

Abstract:

Aiming at the disadvantages of aluminum alloy, such as vulnerable to intercrystalline corrosion, low surface hardness, poor abrasion resistance, electroless plating of Ni-P on aluminum surface was studied. The deposition rate, microhardness, bond strength and corrosion resistance were measured with metallographic microscope, SEM energy spectrum analysis, mass-increase method, thermal shock test and grid test, mass-loss method to determine the effect of the parameters of nickel-phosphorus alloy electroless plating process and the time of pre-electroless plating and activation process.The pre-electroless plating process used NiSO₄ as main salt, NaH₂PO₂ as reducing agent and Na₄P₂O₇ as complexing agent.The results showed that the new activation and pre-electroless plating process could significantly improve the bond strength of Ni-P coating and substrate.The highest deposition rate could be achieved.At the same time, the organizational structure of the coatings was dense and uniform, with good hardness, and excellent corrosion resistance.

Key words: FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">化学镀hansi-font-family: 宋体" lang=EN-US>Ni-PFONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">合金hansi-font-family: 宋体" lang=EN-US>;FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">沉积速率hansi-font-family: 宋体" lang=EN-US>;FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">镀层性能针对铝合金易产生晶间腐蚀、表面硬度低、不耐磨损等缺点，利用金相显微观察、扫描电镜能谱测定、增重法、热震网格实验和失重法，以镀速、镀层结合强度、显微硬度以及耐蚀性为考核指标，研究了以硫酸镍为主盐、以次磷酸钠为还原剂、以焦磷酸钠为络合剂的预化学镀镍磷合金过程的工艺参数以及预化学镀和活化时间对镀层性能的影响。研究结果表明，所获得的活化-预化学镀镍磷合金前处理新工艺可显著提高镀层与基体的结合强度和沉积速率，同时得到的镀层组织结构致密均匀、硬度好、耐蚀性优良。

关键词: FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">化学镀hansi-font-family: 宋体" lang=EN-US>Ni-PFONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">合金hansi-font-family: 宋体" lang=EN-US>;FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">沉积速率hansi-font-family: 宋体" lang=EN-US>;FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">镀层性能

SUN Hua, MA Hongfang, LIU Kegao, LIU Yi. Influence of pretreatment on property of electroless plating of Ni-P on aluminum surface[J]. CIESC Journal, 2010, 61(12): 3200-3204.

孙华, 马洪芳, 刘科高, 刘义. 前处理工艺对铝基Ni-P化学镀层性能的影响 [J]. 化工学报, 2010, 61(12): 3200-3204.

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Influence of pretreatment on property of electroless plating of Ni-P on aluminum surface

前处理工艺对铝基Ni-P化学镀层性能的影响

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