Again and again, production staff are facing the challenge of processing and soldering components that are difficult to wet, such as THT components with brass pins and a nickel surface. The latter in particular presents itself as a real challenge, because even long wetting times or high temperatures do not lead to success here, especially since this procedure can damage the circuit board and components in the immediate vicinity. The reason for the poor processing properties is the nickel and its oxide layer, because nickel oxide is an excellent insulator. This property acts like a barrier layer, which makes soldering very difficult. Fluxes commonly available on the market are pushed to their limits here, so that products are needed which not only allow processing but also protect the nickel surface from oxidation during storage. In addition, this flux must also have good soldering properties. It should also not influence the wave or selective soldering process, so that reliable soldering can be carried out with the set parameters. Many requirements for a product that should help only one type of pin to be solded. But there are such aids which are far less spectacular in their application than their effect. Dipping the pins into these soldering aids, which consist of a carboxylic acid complex, frees the pins from oxides and protects them from further contamination and surface changes. Immediate processing or even storage is possible.
Do you have questions regarding this matter?
Your contact person: Markus Geßner
Company: Emil Otto