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Solution: 1:10 for water use, soak for 5~20 minutes at 60~90°C. If you use it for a long time, consider replacing it with new ones.
2. Why is there a gray-black plaque on the surface after polishing?
Analysis of the cause: The oxide level may be completely removed. Oxide is still present locally.
Solution: Increase the intensity of the scale. Due to the large number of descaling and descaling products, please contact Weihai Yunqing Chemical Development Institute for specific products. Buy stainless steel net to Anping Lingguang Wire Mesh Products Factory.
3. What causes the sharp corners of the workpiece and the tip over-corrosion after polishing?
Analysis of the cause: The current at the corners and the tip is too large, or the temperature of the electrolyte is too high, and the polishing time is too long, resulting in excessive dissolution.
Solution: Adjust the current density or solution temperature, or shorten the time. Check the electrode position, set the shield at the corners, and so on.
4. Why is the workpiece not bright and gray after polishing?
Analysis reason: It is possible that the electrochemical polishing solution has no effect or the effect is not obvious.
Solution: Check if the electrolytic polishing solution is used for too long, the quality is degraded, or the proportion of the solution components is out of balance.
5. What is the white streaks on the surface after the workpiece is polished?
Analysis of the cause: The relative density of the solution is too large, the liquid is too thick, and the relative density is greater than 1.82.
Solution: Increase the agitation of the solution. If the relative density of the solution is too large, dilute to 1.72 with water. Heat at 90~100 °C for one hour. Buy stainless steel net to Anping Lingguang Wire Mesh Products Factory.
6. Why is there a yin and yang surface after polishing and a partial dull phenomenon?
Cause analysis: The position where the workpiece is placed is not aligned with the cathode, or the workpiece is shielded from each other.
Solution: Adjust the workpiece appropriately so that the position of the workpiece and the cathode are appropriate, so that the power distribution is reasonable.
7. After polishing, the surface of the workpiece is smooth and smooth, but some points or blocks are not bright enough, or vertical non-bright stripes appear. What is the cause?
Analysis of the cause: It may be that the bubbles generated on the surface of the workpiece in the later stage of polishing are not detached in time and attached to the surface or the surface has an air flow line.
Solution: Increase the current density, increase the gassing volume to desorb the bubbles, or increase the stirring speed of the solution and increase the flow of the solution. Buy stainless steel net to Anping Lingguang Wire Mesh Products Factory.
8. What is the reason that the contact points of the parts and the hanger are dull and have brown spots, and the rest of the surface is bright?
Analysis of the cause: It may be that the contact between the part and the hanger is poor, resulting in uneven current distribution, or less contact between the part and the hanger.
Solution: Polish the hanger contact points to make the conduction good, or increase the contact area of ​​the parts and the hanger.
9. Some parts polished in the same groove are bright, some are not bright, or some are not bright.
Analysis of the cause: too many workpieces are polished in the same groove, resulting in uneven current distribution, or overlapping and shielding between workpieces.
Solution: Reduce the number of polished workpieces in the same groove, or pay attention to the placement of the workpiece.
10. Why are there silver-white spots near the concave parts of the polished parts and the contact points between the parts and the hangers?
Analysis of the cause: It may be that the recessed part of the part is shielded by the part itself or the hanger.
Solution: Change the position of the part so that the recessed part can get the power line or reduce the distance between the electrodes or increase the current density.
11. Has been strictly in accordance with the process specifications, why is there more or less over-corrosion on the surface of the parts after polishing?
Analysis of the cause: Whether the solution temperature is too high or the current density is too large. If the solution is prepared without problems and has strict operation, it may be a problem before polishing.
Solution: Strictly perform the operation of the other pre-electrochemical polishing process to avoid over-corrosion during the pickling process. Do not leave cleaning water on the surface of the part and bring it into the polishing bath.
12. Why does the bubble appear when used for a while?
Analysis of the cause: The surface of the workpiece is not degreased, and some oil is floating on the surface of the electrolyte, which brings difficulties to the operation.
Solution: If this has happened, it is recommended to remove the oil from the surface. The suggestion that has not appeared is to remove the oil before polishing.
13. What is the relationship between sulfuric acid and phosphoric acid in the electrochemical polishing solution?
Analysis of the reasons: more sulfuric acid, polishing speed is too fast, can accelerate corrosion on the metal substrate, more phosphoric acid, can adsorb a mucous membrane on the surface of the workpiece, the brightness decreases, and the polishing speed becomes slow. Of course, other factors are not excluded.
Solution: Adjust the appropriate ratio of sulfuric acid phosphate. You can also choose the "Yunqing various chromium-free electrolytic additives" formula.
14. After the workpiece is polished, the surface is dull, and there are white spots on the pale yellow base. What causes it?
Analysis of the cause: It may be that the content of chromic anhydride in the electropolishing solution is too high, even more than 1.5%.
Solution: Chromium ion is a heavy metal ion, which is carcinogenic to the human body and pollutes the environment. A chromium-free polishing solution can be used.
15. What are the main electrolyte cost calculations?
Mainly electricity costs, electropolishing machines, electrolyzers, plates, copper rods, electrolytes, etc.
16. What is the current density of various stainless steel materials during electropolishing? What is the relationship with the cost of electrolysis?
Reason analysis: In the market under normal conditions, the density of various materials of stainless steel in electrolysis is: 200 series stainless steel current density is between 25-50 amps, 300 series stainless steel current density is between 15-30 amps, 400 series stainless steel The material current density is between 30 and 55 amps.
Solution: 200 series stainless steel current density is between 15-25 amps, 300 series stainless steel is between 10-15 amps, 400 series stainless steel is between 25-30. The higher the current density, the greater the power consumption. In the accounting of electrolysis costs, electricity costs account for the largest proportion.
17. After polishing, wipe it clean and throw dull, what is the reason for light blue shadow?
Analysis of the cause: It may be that after the electrochemical polishing liquid is prepared, it is not heated and energized, or the operating temperature of the solution is low.
Solution: Heat the electropolishing solution at 120 ° C for one hour or heat the electrolyte to the specified temperature.
18. What is the cause of no light after polishing and yellow spots?
Analysis of the cause: The relative density of the electrochemical solution may be too small, which is less than 1.70.
Solution: Adjust the relative density of electropolishing or heat concentrate at 80-100 °C to increase the relative density. Or replace the new fluid.
19. After the workpiece is polished, why does the brown spot appear when it is taken out of the groove?
Analysis of the cause: It may be that the electropolishing is not enough or the time is short.
Solution: Firstly extend the polishing time appropriately. If there is no effect, it may be a problem of insufficient temperature or current density.
20. Why is it prone to sparking during electrolysis?
Analysis of the causes: There are three factors that cause this phenomenon. One is that the contact point between the hanger and the workpiece is not strong, the second is that the electrolyte density is too low, and the third is that the current density is too high.
Solution: Change the connection method of several hangers and workpieces, and increase the contact point between the hanger and the workpiece as much as possible. If the electrolyte density is too low, the electrolyte can be replaced.
21. What is the effect of stainless steel electrolyte operating temperature on electropolishing? What is the optimal temperature?
Analysis of the cause: The general electrolyte temperature is between 50 and 90 ° C, the temperature is lower, the polishing speed is slower, and the brightness is decreased. When the temperature is too high, the corrosion of the liquid on the workpiece is accelerated, which tends to cause excessive corrosion of the workpiece, and the active component of the electrolyte is easily decomposed.
Solution: The temperature should be lower to the specified temperature, and various heating tubes (such as quartz and titanium heating tubes) can be used for heating. The working temperature will rise for a long time. When the temperature exceeds 90 °C, the operation should be stopped. Or cooling cycle mode. The optimum operating temperature is 50-90 °C. Buy stainless steel net to Anping Lianhong Wire Mesh Products Factory.
22. The surface of the stainless steel workpiece is uneven and the pitting is convex. What causes it?
Analysis of the cause: The surface is more rusted, the electrolyte is only micro-corrosion leveling, and more rusting electrolyte can not be completely removed. For example, the polishing time is extended, and a large amount of iron ions sink into the bottom of the electrolyte to reduce the service life of the electrolyte. Buy stainless steel net to Anping Lianhong Wire Mesh Products Factory. 
Analysis of 22 problems in common stainless steel mesh electropolishing