When methanesulfonic acid tin plating additive is used, the acidity of the plating solution is relatively low, and the corrosion is relatively small. In the use of methylsulfonic acid tin plating additives, we can understand the advantages and disadvantages of additives through performance tests. The following takes the methylsulfonic acid tin plating additive Sn-819 from Bigely Technology as an example to conduct a performance test:
1. Test of antioxidant capacity of plated layer. The plated workpiece is baked in the oven at 190±2℃ for 1 hour and then taken out to observe the state of the plated surface. The experiment shows that after the workpiece is baked, the tin-plated layer still maintains the brightness before the experiment, which indicates that the plated layer has good antioxidant ability.
2. Plating bonding test. Use a steel knife with an angle of 30° to cut a square grid on the plating layer, to cut through the plating to the substrate, and observe whether the plating layer warps or falls off. When the workpiece plating layer did not appear during the experiment, the phenomenon of peeling and peeling off, indicating that the plating bonding force is good.
3、Solderability test of plating layer. Test conditions for 245 ℃, depth of 2.0 mm, depth of 3 mm / s. With a mass fraction of 25% of rosin isopropyl alcohol as a flux, after cooling the workpiece is wetting time to assess the weldability of the coating. Generally, the wetting time of less than 2s is good, 2~3s is better, 3~4s is average, and more than 4s is worse. In the experiment, the wetting time of the workpiece is 1.5s, which indicates that the weldability of the plating layer is good.
4. Corrosion resistance test of plating. Workpiece in the neutral salt spray 48 hours and 72 hours for the test, the workpiece in the experiment after 48 hours is still bright, after 72 hours some gray and black spots on the surface of the workpiece. It shows that the corrosion resistance of the workpiece plating is relatively good.
Through the above performance tests, it can be seen that the methylsulfonic acid tin plating additive Sn-819 from Bigley Technology can obtain a coating with good oxidation resistance, binding force, weldability and corrosion resistance. If you are interested in methylsulfonic acid tin plating additives, you can find out about Bigely. Guangdong Bigely Technology Co., Ltd. was founded in 2003, 15 years focused on the development and manufacturing of methylsulfonic acid tin plating additives, is a research and development, production, sales, service as one of the high-tech enterprises. Bigely methylsulfonic acid tin plating additive is mature and stable, easy to maintain, and has obvious advantages.
