How to Use Degreasers for Electronic Components: Safe Cleaning Guide

Overview: Why degreasing matters for electronics

Degreasing removes oils, flux residues, fingerprints and contaminants that can cause poor solder joints, insulation breakdown or corrosion on printed circuit boards (PCBs) and discrete components. Using a purpose-designed electronic degreaser preserves component integrity, avoids insulating residues and helps ensure reliable long-term operation. This guide covers product selection, preparation, step-by-step cleaning, and South Africa-specific supply and handling considerations.

When to degrease

• After soldering to remove flux and soldering oils.
• Before conformal coating or potting to improve adhesion.
• When refurbishing salvaged boards or removing contaminants after mechanical handling.

Types of degreasers and solvents

Electronic-safe degreasers fall into a few practical categories: low-odour hydrofluoroether (HFE) alternatives, isopropyl alcohol (IPA) blends, citrus-based formulations and aqueous/alkaline cleaners. Choose a product labelled for electronics or contact-cleaning and check compatibility with plastics, adhesives and coatings on your board.

Safety, PPE and ventilation

• Work in a well-ventilated area or use a fume extractor; many degreasers are volatile.
• Wear nitrile gloves, eye protection and avoid skin contact.
• Store flammable solvents in a cool, ventilated place away from ignition sources; follow local regulations for disposal.

South Africa supply and availability notes

Communica stocks a wide range of cleaning solvents, application tools and related supplies in South Africa. Check local branch collection or stock levels at buy-lectro-kleen-2-online-in-south-africa before planning work. Lead times for specialty low-GWP solvents can vary; for commonly used IPA blends, expect immediate availability at major branches and central warehouse in Samrand. For product categories, see the cleaning tools for robotics and iot devices section under best electronic cleaners for circuit boards.

Step-by-step degreasing procedure

Follow these steps for most PCBs and small electronic assemblies. Adapt technique for connectors, motors or delicate sensors.

1. Preparation

• Power down and remove batteries. Discharge capacitors if needed.
• Document connector positions and take reference photos for reassembly.
• Remove large debris with a soft brush or compressed air (use regulated, filtered air).

2. Applying the degreaser

Use a spray can, squeeze bottle or ultrasonic bath depending on the solvent and contamination level. For spot cleaning, apply sparingly and agitate with a soft-bristled brush. For full-board cleaning, work from top to bottom and avoid pooling.

3. Rinsing and drying

• Some solvents are residue-free and evaporate; others require a rinse with IPA or deionised water followed by IPA to aid drying.
• Drying options: ambient evaporation in a clean area, forced warm air (below 50°C), or a convection oven at low temperature for production volumes.

4. Reassembly and test

After a complete dry, reassemble connectors and test power-up on a current-limited bench supply or with a fuse in place. For student labs, record results and include cleaning steps in your build log.

Example: cleaning a small Raspberry Pi-style SBC

Remove SD card and external cables, power down and work on an ESD mat. Use a palm-size spray of IPA or electronic degreaser, brush lightly around connectors and GPIO pins, then blow off with filtered compressed air and allow to dry 10-20 minutes. For classroom labs in South Africa, plan for 30-60 minutes turnaround including drying to avoid accidental power-on while wet.

Troubleshooting

• Component not working after cleaning: check for trapped liquid under heat sinks, re-seat connectors and allow extended drying time.
• Residue remains: try a secondary rinse with higher-concentration IPA or repeat cleaning; inspect under magnification.
• Plastic parts softened or discoloured: test compatibility beforehand and choose a milder solvent.

Practical procurement advice for South Africa

For students and makers, common degreasers and IPA are typically stocked by Communica and can be checked via the All Products index. Request VAT invoices for institutional purchases and use branch collection from Samrand or Pretoria CBD to reduce wait times; see collection details at About Us. For larger lab requirements, obtain an account quote and check lead times for specialised low-GWP solvents if needed.

Sources

• National Fire Protection Association - safety guidance on flammable liquids (https://www.nfpa.org/?utm_source=straider&utm_medium=referral&utm_campaign=prebo-digital)
• US EPA - solvent and volatile organic compound information (https://www.epa.gov/?utm_source=straider&utm_medium=referral&utm_campaign=prebo-digital)
• Communica product listings and branch information (https://www.communica.co.za/?utm_source=straider&utm_medium=referral&utm_campaign=prebo-digital)