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影响镀锌层沉积速度的因素分析,烤漆房相关知识

文章发布: 发表时间: 2017-03-28 10:22:56

可能影响镀锌层堆积速度的因素有以下几种
There are several factors that may affect the stacking velocity of the zinc coating
(1)前处理不完全。工件外表有氧化膜,影响锌的正常堆积。
(1) incomplete pretreatment. There is an oxide film on the surface of the workpiece, which affects the normal accumulation of zinc.
(2)导电不良。电流在导线上耗费,分配到工件外表的电流过小。
(2) poor conductivity. The current is expended on the wire and the current flowing to the surface of the workpiece is too small.
(3)工件含碳量高。高碳钢、铸铁件等会下降氢的分出电位,工件外表析氢加快,电流效率下降。
(3) high carbon content. High carbon steel, cast iron and other parts will reduce the potential of hydrogen, hydrogen evolution of the workpiece surface, the current efficiency decreased.
(4)工件绑扎过密。镀锌时工件部分遭到屏蔽而致使镀层过薄。
(4) the work is too tight. Galvanized part of the work was shielded and the coating is too thin.
(5)镀液温度偏低。当镀液温度偏低时配送的电流密度相应下降,镀层的堆积速度也必定下降。
(5) the bath temperature is low. When the bath temperature is low, the current density of the distribution decreases, and the deposition rate of the coating decreases.
(6)镀液中氢氧化钠含量偏高。氢氧化钠含量偏高时电流效率相应下降。
(6) sodium hydroxide content in plating bath is high. The current efficiency decreases when the sodium hydroxide content is high.
(7)镀液中添加剂含量偏低。添加剂含量偏低会影响涣散才能,镀层部分显得过薄。
(7) low additive content in plating bath. Low additive content will affect the ability to slack, the coating part is too thin.
(8)受镀件面积预算缺乏,施镀时配送的电流密度显得过小。
(8) the area of the plated parts is not enough, and the current density is too small.
(9)工件悬挂办法不妥,与锌阳极距离过大,应调整方位。
(9) the method of suspension is not good, and the distance between the anode and zinc is too large.
(10)工件过腐蚀。下降氢的分出电位,工件外表析氢加快电流效率下降,然后影响锌的堆积速度。应在酸洗溶液中参加适当的缓蚀剂,部分处氧化皮过厚先用机械法除掉,酸洗
(10) over corrosion of workpiece. The hydrogen potential is decreased, and the hydrogen evolution rate of the workpiece is reduced, and then the deposition velocity is affected. The appropriate corrosion inhibitor should be used in the pickling solution, and some of the oxide skin is too thick to be removed by mechanical method
过程中多作查看。
Multi view process.
(11)阳极钝化。有用面积减少,影响电流的正常散布。
(11) anode passivation. Useful area reduction, affecting the normal distribution of current.
(12)氢氧化钠含量偏低。若氢氧化钠含量偏低时,电流密度提不高,阳极钝化。
(12) low sodium hydroxide content. If the sodium hydroxide content is low, the current density is not high, the anode passivation.
 

 

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