pH值及温度对AZ31镁合金化学镀Ni-P合金性能的影响
发布时间：2018-11-09 15:58
【摘要】：采用电化学技术等试验方法,研究了镀液p H值及温度对AZ31镁合金化学镀Ni-P合金镀层的镀速、孔隙率、点滴腐蚀试验时间、腐蚀电位、腐蚀电流和交流阻抗的影响。结果表明,当镀液pH值为7时,AZ31镁合金化学镀Ni-P合金镀层的沉积速率最大,为8.48μm/h,显微硬度高(250 kgf/mm~2),孔隙率为0个/cm~2,Na Cl点滴腐蚀试验时间最长,为90 s,腐蚀电流密度小,为0.177 m A/cm~2,腐蚀电位最大,为-1.015 V。当镀液温度为75℃时,镀层的沉积速率大,耐蚀性能好。镀层包状物颗粒均匀、紧密、无缺陷。
[Abstract]:The effects of bath pH value and temperature on the plating rate, porosity, droplet corrosion test time, corrosion potential, corrosion current and AC impedance of AZ31 magnesium alloy electroless plating Ni-P alloy coating were studied by electrochemical technique. The results show that when the pH value of the plating solution is 7, the deposition rate of the electroless Ni-P alloy coating on AZ31 magnesium alloy is 8.48 渭 m / h, the microhardness is high (250 kgf/mm~2), the porosity is 0 / cm~2,Na Cl drop corrosion test time is the longest. The corrosion current density is 0.177 Ma / cm ~ (-2) and the corrosion potential is-1.015 V. When the bath temperature is 75 鈩，
本文编号：2320879
[Abstract]:The effects of bath pH value and temperature on the plating rate, porosity, droplet corrosion test time, corrosion potential, corrosion current and AC impedance of AZ31 magnesium alloy electroless plating Ni-P alloy coating were studied by electrochemical technique. The results show that when the pH value of the plating solution is 7, the deposition rate of the electroless Ni-P alloy coating on AZ31 magnesium alloy is 8.48 渭 m / h, the microhardness is high (250 kgf/mm~2), the porosity is 0 / cm~2,Na Cl drop corrosion test time is the longest. The corrosion current density is 0.177 Ma / cm ~ (-2) and the corrosion potential is-1.015 V. When the bath temperature is 75 鈩，
本文编号：2320879
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