Product Info

Flux residue is the leftover substance on a circuit board after the soldering process. Flux is a chemical used to help solder adhere to the circuit board and to remove oxides that occur during soldering. However, if not properly cleaned, flux residue can affect the operation of the circuit board.

🔹 Types of Flux Residue
Flux residues commonly found are divided into three main types:

1. Rosin-Based Flux Residue
- This type of flux contains rosin and requires a solvent to be cleaned off.
- Commonly used in general soldering in the electronics industry.
- If not removed, it can accumulate and cause abnormal electrical conductivity.

2. No-Clean Flux Residue
- Designed to leave no harmful residues on the circuit board.
- Cleaning is not necessary after soldering.
- Excessive accumulation can make the circuit board appear dirty or cause problems with certain devices.

3. Water-Soluble Flux Residue
- Easily cleaned with water.
- Used in applications requiring high cleanliness, such as in the aerospace or medical equipment industries.
- If not thoroughly cleaned, it can cause corrosion of the circuit board.

🔹 Why Remove Flux Residue?
If flux residue is not cleaned, it can cause several problems for the circuit board:

- Reduced electrical conductivity – may cause erratic electrical signals.
- Short Circuit – flux residue with high moisture content can conduct electricity.
- Corrosion of the circuit board – certain types of flux can be acidic and damage the circuit board.
- Impact on Quality Control – circuit boards with residual flux may be considered defective.