201 Bright Electrolytic Wire Stainless Steel Wire Manufacturers 304 Stainless Steel Coil Wire

Surface Quality: "Bright" Aesthetics & Functional Protection

1. 201 Bright Electrolytic Wire: Mirror-Like Aesthetics

• High Reflectivity: The electrolytic polishing process delivers a mirror finish (reflectivity ≥85%), making the wire visually striking for decorative use (e.g., jewelry, gift baskets). Unlike painted wires, the bright surface is scratch-resistant and does not peel over time.

• Clean, Oxide-Free Surface: Electrolysis removes surface impurities, leaving a pure metal surface that resists mild tarnishing (in dry indoor environments). For short-term outdoor use (e.g., temporary decorative installations), it maintains brightness for 6-12 months.

2. 304 Stainless Steel Coil Wire: Passive Film Protection

• Natural Passive Film: 304’s chromium content forms a 2-3nm thick chromium oxide film on the surface—this invisible layer:

• Blocks moisture, oxygen, and corrosive media (e.g., saltwater, mild acids) from reaching the steel core.

• Self-heals: If scratched, the surrounding chromium reacts with oxygen to rebuild the film—unlike 201 (which has lower Cr content and limited self-healing).

• Optional Surface Treatments: Manufacturers offer additional finishes for specific needs:

• Annealed Surface: Matte finish (Ra 0.2-0.8μm) for applications where reflectivity is not required (e.g., industrial springs).

• Tinned Surface: A thin tin layer for enhanced solderability (e.g., electronic wire leads).

Coil Design Advantages (for 304 Coil Wire)

• Custom Coil Specifications: Manufacturers offer flexible coil sizes to match processing lines:

• Wire diameter range: 0.1mm-10mm (common: 0.3mm-2mm for precision parts, 3mm-10mm for heavy-duty use).

• Coil inner/outer diameter: Standard inner diameter (50mm, 100mm) to fit industrial uncoiling machines; outer diameter up to 500mm (for bulk orders).

• Weight customization: From small coils (1kg for prototype development) to large coils (50kg+ for mass production), reducing material waste.

• Easy Uncoiling: Coils are wound with consistent tension and secured with paper or plastic sleeves—ensuring smooth, tangle-free uncoiling during automated processing (e.g., wire forming, mesh weaving, or spring coiling). This improves production efficiency and reduces downtime.