The hottest measures to improve the dispersion cap

2022-08-14
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Measures to improve the dispersion ability of fastener galvanizing solution

the dispersion ability of fastener galvanizing solution mainly refers to the dispersion ability of electrolyte, which is the ability to make each part of the workpiece obtain a uniform coating under the condition of unequal spacing between cathode and anode in the electrolyte. It is an important utilization proportion maximum index to evaluate the process formula of electrolyte and the quality of coating. The dispersion of fastener galvanizing solution mainly refers to the dispersion ability of electrolyte, which is the ability to make each part of the workpiece obtain a uniform coating under the condition of unequal spacing between cathode and anode in the electrolyte. It is an important indicator to evaluate the process formula of electrolyte and the quality of coating. How to maintain and improve the dispersion ability of electrolyte in daily work is an important research object for electroplating workers. The following are ten measures to improve the dispersion ability of galvanized solution of fasteners

measure 1. Adopt shielded cathode. For the workpiece with complex shape and unable to use auxiliary anode, the method of shielding cathode can be adopted, that is, the protruding part of the tip used to measure the deformation of the sample during the experimental process can be protected, so as to increase the current intensity, improve the current density of the deep concave part, and achieve the purpose of improving the dispersion ability of electrolyte

measure 2. Adopt auxiliary anode. Adopting auxiliary anode is an effective method to improve the dispersion capacity of electrolyte, which can make the concave part of the workpiece get the opportunity of ion discharge at the same time. In mass production, as long as the insulation problem between cathode and anode is handled well, and the cathode and anode are assembled together, the operation is also very convenient

measure 3. Expand the spacing between cathode and anode. Expanding the distance between cathode and anode can reduce the distance ratio between the protruding part and the concave part of the workpiece and the anode, which is conducive to the smooth sinking of the zinc layer on the concave part. Specific operation method: move the higher the upper limit temperature value of the cathode bar, and tilt the cathode bar towards the opposite pole

measure 4. Change the hanging direction of the workpiece. When hanging plating, the deep concave surface is deliberately oriented towards the anode, which can make the power line evenly distributed and achieve the opportunity of ion discharge at the same time

measure 5. Increase the anode area. The ratio of cathode and anode area of zincate zinc plating is 1:2. Insufficient anode area is prone to passivation. At this time, the effective anode area is further reduced, which affects the conductivity and the required current density, and then affects the dispersion ability of electrolyte

measure 6. Reasonably distribute anodes. Reasonable distribution of anode is also the key to improve the dispersion ability of electrolyte. During operation, the anode should be distributed according to the shape of the workpiece. The anode should be concentrated in the concave part of the workpiece and away from the protruding part of the workpiece, so as to achieve the purpose of adjusting different parts and different required current density. Increasing the current density of the concave surface is conducive to improving the dispersion ability of the part; Reducing the current density on the protruding surface is also conducive to avoiding the possibility of coke plating on this part

measure 7. Adopt impulse current. At the initial stage when the workpiece is hung in the plating bath, a current twice the normal current density is used for impact. This method can make the parts that are not easy to sink the coating first sink a thin layer of zinc, and then when the normal current density continues to be plated, it is easy to sink zinc on this thin layer of zinc, that is, under the condition of normal current density, the deposition of zinc on zinc is easier than that on the surface of steel, otherwise it may not be able to deposit zinc eventually

measure 8. Move the cathode. Moving the cathode can appropriately increase the current density, which is conducive to improving the dispersion ability of the electrolyte. It is not easy to coke the protruding part of the tip. If the plating bath is not equipped with a cathode moving device, it can be replaced by manually shaking the workpiece

measure 9. Maintain normal additive concentration. An appropriate additive concentration in the electrolyte can expand the range of current density and significantly improve the dispersion and coverage of the bath

measure 10. Adjust the proportion of zinc oxide and sodium hydroxide. When the zinc ion content in the plating solution exceeds the concentration of the proportion of sodium hydroxide in the process formula, the dispersion ability of the plating solution will be affected. At this time, it should be adjusted in time

zincate galvanizing is the main work in many galvanizing processes at present. Next, I will tell you a few points that you should follow the later art, and the zincate galvanizing process is sensitive to the dispersion ability of the solution. When the shape of the workpiece is more complex, the composition of the electrolyte changes slightly, and the process conditions are slightly worse, the dispersion ability of the electrolyte will be affected, which often affects the application and promotion of this process, And because this phenomenon in zincate zinc plating process is close to some plating species, it can be used as a reference for similar quality problems of other plating species, so everyone pays more attention to this process

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