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首页> 外文期刊>International Journal of Electrochemical Science >Natural Kermes Dye as an Effective Additive for Electrochemical Deposition of Nickel from Watts-type Nickel Bath
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Natural Kermes Dye as an Effective Additive for Electrochemical Deposition of Nickel from Watts-type Nickel Bath

机译：天然柯氏染料作为瓦茨型镍浴中镍化学沉积的有效添加剂

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摘要

In this work, considerable improvements in the corrosion resistance as well as on the microhardness ofthe electrodeposited nickel from Watts-type nickel bath has been achieved by using Natural Kermes Dye(NKD) as an effective additive. The investigation was carried out to study the influence of differentconcentrations of NKD on the polarization behavior, anodic linear stripping voltammetry, cyclicvoltammetry, cathodic current efficiency, current-time transients as well as on the microhardness. Themicrohardness was improved considerably, it changes from 130.4 to 225 kg f mm -2 in the presence 8.0x 10 -6 M NKD. Moreover, the corrosion resistance of Ni coating was enhanced about five times in theexistence of 1.0 x 10 -5 M NKD. On the other side, the inclusion of NKD to the plating electrolyte leadsto a large move in the polarization as well as on the deposition potential to nobler potentials, pointingout a catalytic action of NKD on nickel deposition process. The kinetic information emphasized that theexchange current is significantly increased with enhancing NKD concentration while α c remains nearlyconstant, supposes that the addition of NKD does not change the Ni deposition mechanism. The phasesand morphology of the nickel coatings were checked in the absence and presence of NKD by XRD andSEM.
机译：在这项工作中，通过使用天然Kermes染料（NKD）作为有效的添加剂，已经大大改善了瓦特（Watts）型镍镀液中电沉积镍的耐腐蚀性以及显微硬度。进行了研究以研究不同浓度的NKD对极化行为，阳极线性溶出伏安法，循环伏安法，阴极电流效率，电流时间瞬变以及对显微硬度的影响。在8.0×10 -6 M NKD的存在下，显微硬度明显提高，从130.4变为225 kg f mm -2。此外，在1.0 x 10 -5 M NKD存在下，Ni涂层的耐蚀性提高了约5倍。另一方面，将NKD包含在电镀液中会导致极化以及沉积电势向更高的电势大幅度移动，这表明了NKD对镍沉积过程的催化作用。动力学信息强调，随着NKD浓度的增加，交换电流显着增加，而αc保持恒定，这是假定添加NKD不会改变Ni的沉积机理。用XRD和SEM观察了NKD的存在与否，检验了镍镀层的相形态。

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