Speciation in Electroless Nickel Solutions

N. M. Martyak; J.E. McCaskie

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Speciation in Electroless Nickel Solutions

机译：化学镍溶液中的形态

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The role of complexing agents in electroless nickel solutions is studied using speciation calculations. Electroless nickel solutions, employing lactic or aspartic acids or glycine, decrease the concentration of free nickel. The most predominant nickel species in solution are Ni(CH_3CH(OH)COO)_3~-, Ni(OOCCH_2CH(NH_2)COO)_2~(-2) and Ni(H_2NCH_2COO)_3~-. All solutions exhibit a fraction of free nickel, which decreased with increasing formation constant of the nickel-ligand species. The plating rate and solution stability are dependent upon the structure of nickel in solution. Higher deposition rates were observed in nickel solutions with fewer chelated sites in the nickel complex.

机译：使用形态计算研究了络合剂在化学镍溶液中的作用。使用乳酸或天冬氨酸或甘氨酸的化学镍溶液会降低游离镍的浓度。溶液中最主要的镍种类是Ni（CH_3CH（OH）COO）_3〜-，Ni（OOCCH_2CH（NH_2）COO）_2〜（-2）和Ni（H_2NCH_2COO）_3〜-。所有溶液均显示出一部分游离镍，该游离镍随镍配体物种形成常数的增加而降低。电镀速度和溶液稳定性取决于溶液中镍的结构。在镍溶液中观察到较高的沉积速率，而镍络合物中的螯合位点较少。

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《Plating & Surface Finishing》 |1996年第2期|p.62-66|共5页
作者
N. M. Martyak; J.E. McCaskie;
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正文语种 eng
中图分类金属腐蚀与保护、金属表面处理;
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Speciation in Electroless Nickel Solutions

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