Metal fitness equipment (e.g., dumbbells, barbells, iron racks) is prone to rusting due to sweat, humidity, or atmospheric oxidation. Spray coating processes—such as electrostatic powder spraying or electrophoretic deposition—create a protective barrier, significantly extending service life.

Spray coating offers a wide range of colors and finishes (e.g., matte, metallic gloss), improving visual appeal to align with gym or home decor requirements.

Certain coating techniques—such as rubberized paints or textured finishes—increase surface friction to prevent hand slippage, reducing injury risks during exercise.

Smooth spray-coated surfaces (e.g., epoxy resin) are easier to wipe down and disinfect, minimizing bacterial growth and meeting public fitness facility hygiene standards.

Mandatory Coating:

Ferrous metals (e.g., iron, steel) are highly susceptible to rust and require protective coatings—such as powder coating—to isolate them from air and moisture.

Exceptions:

Stainless steel or anodized aluminum equipment may not need additional coating if surface treatments (e.g., oxidation/passivation) are already applied, though such materials incur higher costs.

Optional Coating:

While plastics are inherently corrosion-resistant, spray coatings can enhance abrasion resistance and improve tactile feel (e.g., rubberized paint on plastic-encased weight plates).

Alternatives:

Some plastic components achieve desired colors/textures directly through mold injection without requiring post-coating processes.

Required Coating:

Wood is prone to moisture-induced warping or cracking and necessitates protective finishes—such as clear varnish or wood stains—to preserve structural integrity and enhance aesthetics.