1.Technological process of production
pay off→electrolytic degreasing→water rinsing→pickling→water
rinsing→tin plating→water rinsing→neutralization→water
rinsing→drying→take up
2.Main process introduction
Electrolytic degreasing: remove the oil on the surface of copper wire to ensure the
binding force of the coating .
Pickling: remove the oxide from the surface of the copper wire.
Water rinsing: clean the wire thoroughly after the tank to avoid mutual
contamination of the tank.
Tin plating: the copper wire is coated with a uniform coating.
Neutralization:neutralize the acid on the surface of copper wire to prevent
discoloration on the surface of the product.
3.Solution preparation
| Electrolytic degreasing solution | Electrolytic degreasing powder | 50~70g/L |
| Temperature | 55~65℃ |
| Pickling solution | HCl | 130~160g/L |
| Temperature | room temperature |
| Tin plating solution | Sn2+ | 70~180g/L |
| CH4O3S | 55~65g/L |
| Wake up agent | 30~50mL/L |
| Temperature | 40~50℃ |
4.Solution analysis
(1) Analysis of divalent tin content
1.1 Pipette 2ml of plating solution into a 250ml conical flask;
1.2 Add 100ml of deionized water and 20ml of 1:1 HCl;
1.3 Add 8 drops of starch indicator;
Titrate with 0.1N iodine standard solution to blue as the endpoint;
1.5 Calculate the concentration of divalent tin ions:
Sn2+(g/l)=V0.1N iodine solution (ml)* 2.97
(2) Analysis of Methanesulfonic acid content
2.1 Pipet 5ml of plating solution into a 250ml conical flask;
2.2 Add pure water to 100ml;
2.3 Add 8 drops of PAN indicator;
2.4 Titrate with 1N sodium hydroxide standard solution until it
turns red, and record the milliliters of titration;
2.5 Calculation of free acid content:
ACID (g/l)=V1N sodium hydroxide (ml) * 19.2
5. Our Services
In order to guarantee the customers are able fully to operate the
machine, if the customer need, we can help customer training,
includes:
(1) Correct operating mode
(2) Correct maintenance way
(3) Correct technological process control
(4) Remove simple problem
All the electroplating machine of our company have already been
widely used in electroplating area.
6.Packaging & Shipping
We can pack it by pallet, or according to the customers' specific
requirements.
Port: Shanghai/Ningbo
