Low Current Electrolytic Treatment of Electric Heating Tube Electroplating

Low Current Electrolytic Treatment of Electric Heating Tube Electroplating

Troubleshooting

5.1 Dilution treatment

Prepare some new solutions and conduct Hull cell tests according to the volume ratio of new and old solutions at 1:3, 1:2, and 1:1, respectively. The test pieces did not improve. If we continue to reduce the proportion of the old solution in the experiment, even if there is an improvement effect, it will not have practical significance, and this plan will be rejected.

5.2 Low current electrolysis treatment

Taking 50L of solution and conducting low current electrolysis treatment for 8 hours for Hull cell test showed no significant effect, and this plan was also rejected.

5.3 Adsorption treatment

Take 50L of plating solution, add 30% hydrogen peroxide (diluted 3-5 times) in a ratio of 6mL, stir for 30min, let stand for 30min, add 8gL of activated carbon, stir for 30min, let stand for 4h for filtration, and conduct Hull cell test after low current electrolysis treatment for 4h. The appearance of the test piece has been significantly improved, and the coating is uniform, especially in the low current density area. Analysis of the composition of the plating solution showed that before and after treatment, the content of silver cyanide and potassium cyanide decreased by 3gL and 6gL respectively, still within the limit of the process range.

The prepared plating solution was used for trial plating, and the coating was uniform and fine with good dispersion ability, Φ The coating thickness at the bottom of the 6mm and 70mm deep hole meets the requirements, and the parts are insulated at 120 ℃ for 1 hour without any foaming phenomenon.

We treated the large tank solution according to the above method, and after a small batch of trial plating, it returned to normal and the solution malfunction was eliminated.

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