The problem

Metal trolleys are widely used in electronics manufacturing and assembly areas for transporting components, tools, and sub-assemblies. While metal structures can be grounded, painted surfaces, shelves, and handles often remain electrically isolated.

Inconsistent grounding and worn paint layers can result in unpredictable ESD behaviour, especially when trolleys move between different work areas and flooring types.

The substrate

Mild steel or stainless steel trolleys with painted or powder-coated surfaces, including shelves, frames, and push handles.

Why replacement was not viable

• High cost of purpose-built ESD-safe trolleys
• Long lead times for custom trolley fabrication
• Large installed base already in daily use
• Operational disruption during replacement

The ProShieldESD solution

ProShieldESD was applied as a thin, uniform coating to the painted and accessible metal surfaces of the trolley, including shelves and handles. The coating forms a continuous dissipative layer while maintaining mechanical durability.

When combined with proper grounding of the trolley frame, the system delivers predictable ESD behaviour during movement and handling.

Performance outcome

• Controlled surface resistance across coated metal surfaces
• Uniform charge dissipation during trolley movement
• No impact on load capacity or structural integrity
• Durable performance under daily operational use

Standards alignment

The converted metal trolleys support ESD control programs aligned with IEC 61340 and ANSI/ESD S20.20 requirements when properly grounded and integrated into ESD-controlled areas.

Key benefits

• Upgrades existing trolleys into ESD-safe assets
• Reduces variability caused by worn or insulating paint layers
• Avoids replacement cost and downtime
• Easy to maintain or recoat if damaged