A customer inquired that during the production process of using zinc nickel alloy brightener, the sodium carbonate content in the plating solution should be controlled within the range of 50g/L. However, how should the sodium carbonate content in the plating solution be analyzed?
Based on the on-site experience of the alkaline zinc nickel alloy brightener BZ-617, Bigley Technology shares with everyone the analysis method of sodium carbonate content in the plating solution:
1. Analytical reagent: 1.0000mol/L hydrochloric acid standard titration solution, barium chloride solution, phenolphthalein indicator, bromocresol green methyl red mixed indicator
2. Analysis method:
① Take 10ml of plating solution into a 250ml conical flask, add 10ml of barium chloride solution, add 2-3 drops of phenolphthalein indicator, and titrate with 1.0000mol/L hydrochloric acid standard titration solution under stirring until the solution turns slightly red as the endpoint. Record the volume of standard titration solution consumed for titration as V1.
② Take 10ml of plating solution into a 250ml conical flask, add 10 drops of bromocresol green methyl red mixed indicator, and titrate with 1.0000mol/L hydrochloric acid standard titration solution under stirring until the solution turns red as the endpoint. Record the volume of standard titration solution consumed for titration as V2.
Calculation:
The concentration of sodium carbonate in the plating solution is 105.99 * C * (V2-V1)/10
Note: C is the concentration of the hydrochloric acid standard titration solution, (V2-V1) is the milliliter of titration liquid consumed by sodium carbonate in the plating solution, and 10 is the measured 10ml of the plating solution.
In this way, during the production process of using alkaline zinc nickel alloy brightener, we can timely and accurately analyze and control the content of sodium carbonate in the plating solution, ensure the stability of the plating solution, and effectively improve production efficiency. If you are interested in zinc nickel alloy brighteners, please contact Bigley customer service for free samples and detailed technical information!
If you want to learn more about zinc nickel alloys, you can click to view the "Electroplating Encyclopedia".
