1、 Overview

1. The welding aid effect is good, and the wettability of Sn Pb alloy layer is good.
2. The lead and tin on the surface of the printed board are uniform, smooth and bright, and have good adhesion with the bottom layer.
3. The board surface is easy to be washed with water, and there is less spray in the washing process.
4. The phenomenon of lead-free tin bridge connection between thin lines is suitable for surface mount technology.
5. Strong adhesion with copper surface, suitable for vertical and horizontal tin spraying process.
6. It does not contain flammable and volatile substances. It is safe to use and does not need to add diluent.
7. Low acidity, not easy to damage the wind knife.
8. There are few residual substances, which does not affect the normal use of lead and tin.

2、 Technical indicators

Colorless or light yellow viscous liquid

PH value 1.0-2.0

Specific gravity (g / cm) ³） 1.05±0.02

3、 Process conditions

Lead tin bath temperature 240-280 ℃

Hot air temperature 190-230 ℃

Air pressure 0.3-0.5mpa

Lead tin immersion time 1-4s

4、 Use and maintenance

1. Printed boards must be cleaned before applying flux.

2. Directly use h-380# stock solution to coat the plate surface, roll coating, soaking or spray coating.

3. The copper impurities and residues in the tin cylinder must be treated periodically.

4. The workplace must be ventilated.

5、 Packaging and storage

Package: 25 liters

Storage: store indoors at room temperature.

Period of validity: six months.