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In the production and use of electronic products, corrosion of PCBA (Printed Circuit Board Assembly) has always been a significant factor affecting product reliability. How to effectively protect against and repair PCBA corrosion has become a focus for engineers. Here are some technical insights and practical experiences for your reference.
Causes of PCBA Corrosion
PCBA corrosion is typically caused by several factors:
Environmental Factors: Humidity, salt fog, and sulfides can lead to corrosion on the surface of circuit boards.
Material Selection: Poor oxidation resistance of PCB materials and components can make them prone to corrosion.
Process Issues: Improper soldering and cleaning processes can accelerate corrosion.
Protective Measures
Material Selection: Choose high-quality PCB materials and components, such as those from PCBGOGO, which are known for their superior corrosion resistance.
Surface Treatment: Apply conformal coatings, like three-proof (moisture, salt fog, and mold) coatings, to effectively isolate environmental factors.
Environmental Control: Maintain a dry environment during production, storage, and use to reduce the likelihood of corrosion.
Repair Methods
Cleaning: Use specialized cleaning agents and tools to thoroughly remove corrosion.
Re-soldering: For broken traces caused by corrosion, re-soldering can be used to repair the connections.
Coating: Reapply conformal coatings to the repaired areas to enhance protection.
By implementing these measures, PCBA corrosion can be effectively protected against and repaired. In practice, adjustments should be made based on specific conditions.
