How long is the storage period of copper and how to extend the storage time?

Brass does not have tin plating for 3-12 months, and tin plating is usually more than one year.

Method of prolonging preservation time

1 Cooling. If the copper cylinder has a cooling system, first reduce the operating temperature to how much, refer to the parameters provided by your supplier.

Adding stabilizer. Refer to the quantity supplied by your supplier and make appropriate modifications according to subsequent plating conditions and cylinder volume.

3 reduce the pH value.PH down to the number according to the parameters supplied by your supplier.

4. During the waiting period, the circulation of copper cylinder can not stop. The aeration and stirring should be properly turned off to avoid the contact between the liquid medicine and metal. If the basket is used, the basket must be put forward to the copper cylinder.

5 when re production, the amount of the plating plate is corrected according to the parameters supplied by your supplier.

If the standstill time of the copper cylinder is long and the cylinder volume is small, it is suggested that the copper cylinder be discharged, because there are already many by-products, which will affect the quality of the coating.

7 PTH is an important part of PCB production. The precondition of saving cost is to ensure quality first. Without quality assurance, there is no need to talk about saving cost at all.

8. Reducing PH or adding stabilizers are two choices. If the price of medicine and water is calculated by board area, it is recommended to add stabilizers. But there is no output. The price of medicine and water by board area is really too black.