Reagents are strictly prohibited for cleaning industrial control computers

Prohibited Cleaning Agents for Industrial Control Computers: What to Avoid and Why

Industrial control computers (ICCs) operate in demanding environments, often exposed to dust, grime, and chemical contaminants. While cleaning is essential for maintaining performance, using the wrong agents can damage sensitive components, compromise electrical integrity, or void warranties. This guide highlights cleaning substances to avoid and explains their risks.

Harsh Solvents and Their Dangers

Many common household or industrial solvents are unsuitable for ICCs due to their corrosive or conductive properties.

Acetone and Strong Organic Solvents

Acetone, found in nail polish removers and some paint thinners, dissolves plastics, rubber gaskets, and protective coatings. Its rapid evaporation rate may leave residues that attract dust or interfere with electrical contacts.

Key Risks

• Material degradation: Acetone can warp plastic casings or erode adhesive layers on circuit boards.

• Static discharge: Friction during cleaning with acetone-soaked cloths may generate static electricity, damaging microchips.

• Flammability: Acetone vapors are highly flammable, posing explosion risks in poorly ventilated areas.

Alcohol-Based Cleaners with Additives

While isopropyl alcohol (IPA) is often safe for electronics, versions containing fragrances, dyes, or moisturizers leave sticky residues. These additives trap dust or create conductive paths, leading to short circuits.

Key Risks

• Residue buildup: Additives in scented or “multi-purpose” alcohols form grime over time.

• Corrosion: Some additives react with metal contacts, accelerating oxidation.

• Compatibility issues: Certain formulations may dissolve label adhesives or screen coatings.

Aqueous Solutions and Moisture-Related Hazards

Water-based cleaners seem harmless but introduce risks if not used correctly, especially in industrial settings.

Tap Water and Mineral Deposits

Tap water contains dissolved minerals like calcium and magnesium, which leave white, chalky deposits when evaporated. These deposits insulate heat sinks or interfere with connector pins.

Key Risks

• Thermal inefficiency: Mineral deposits on heat sinks reduce heat dissipation, risking overheating.

• Electrical resistance: Deposits on contacts increase resistance, causing voltage drops or signal loss.

• Corrosion: Chlorine and other chemicals in tap water may corrode metal surfaces over time.

Soapy Water and Conductivity Concerns

Even mild dish soap mixed with water can create conductive solutions if not rinsed thoroughly. Soap residues attract dust and humidity, forming conductive layers that bridge electrical gaps.

Key Risks

• Short circuits: Residual soap on circuit boards may create unintended electrical paths.

• Component damage: Soap can seep into connectors, causing oxidation or corrosion.

• Cleaning complexity: Rinsing soap requires distilled water and thorough drying, increasing labor and error risk.

Abrasive and Particulate Cleaners

Physical abrasion from certain cleaning tools or agents can scratch surfaces or dislodge tiny components.

Powdered Cleaners and Scouring Pads

Powdered cleaners like baking soda or commercial scouring agents are abrasive enough to scratch metal enclosures or plastic casings. Scouring pads may fray into fibers that lodge in ports or fans.

Key Risks

• Surface damage: Scratches compromise aesthetic appeal and may expose underlying materials to oxidation.

• Particulate contamination: Loose particles from cleaners can clog cooling vents or interfere with moving parts.

• Static generation: Rubbing abrasive materials against surfaces may create static charges.

Compressed Air with Contaminants

While compressed air is useful for dust removal, cans labeled “general-purpose” may contain propellants or lubricants that leave oily residues. These residues attract dust and degrade component performance.

Key Risks

• Oil contamination: Residues from compressed air cans coat surfaces, trapping dirt and grime.

• Moisture introduction: Some cans release cold vapor that condenses on surfaces, risking short circuits.

• Pressure damage: Excessive air pressure may dislodge delicate components or force dust deeper into ports.

Safe Alternatives and Best Practices

To avoid these risks, opt for non-conductive, non-corrosive cleaning methods tailored to ICCs.

Dry Cleaning Techniques

Use soft, lint-free microfiber cloths to wipe down enclosures and non-critical surfaces. For vents and fans, employ anti-static brushes or vacuum attachments designed for electronics.

Application Tips

• Gentle pressure: Avoid pressing hard on screens or delicate ports.

• Directional wiping: Follow the grain of metal surfaces to minimize scratches.

• Frequency control: Clean only when necessary to reduce wear and tear.

Distilled Water for Light Moisture Needs

If moisture is unavoidable, dampen a cloth with distilled water and wring it out thoroughly. Distilled water lacks minerals, reducing residue risk.

Precautions

• Spot testing: Apply to an inconspicuous area first to check for adverse reactions.

• Immediate drying: Use compressed air or a dry cloth to remove moisture quickly.

• Avoid ports: Keep distilled water away from connectors, slots, and openings.

Specialized Electronic Cleaning Swabs

Pre-moistened swabs with 99%+ isopropyl alcohol (without additives) are safe for cleaning connectors, pins, and small crevices. Their controlled moisture content minimizes spill risks.

Usage Guidelines

• One-time use: Discard swabs after cleaning to prevent cross-contamination.

• Targeted application: Focus on oxidized or dirty areas without spreading contaminants.

• Storage: Keep swabs in their original packaging to prevent evaporation or contamination.

By avoiding prohibited cleaning agents and adopting safe alternatives, technicians can maintain ICCs without risking damage. Always prioritize dry methods first and reserve moisture-based cleaning for critical, well-controlled scenarios.