| Surface Treatment | Salt Spray Resistance | Hydrogen Embrittlement Risk | High Temperature Resistance | Appearance | Cost | Optimal Application Scenarios |
| Passivation | Dozens ~ 200h | None | Medium | Natural / Bright finish | Low | Precision stainless steel, aluminum & copper parts; food & medical equipment |
| Black Oxide | < 24h | None | Medium | Matte black | Very low | Indoor use, temporary rust prevention, anti-glare parts |
| Nickel Plating | 200 ~ 500h | Exists | Medium | Bright silver | Medium-High | Electronic components, bathroom hardware, decorative & wear-resistant parts |
| Color Zinc Plating | 48 ~ 96h | Exists | Average | Iridescent color | Medium | Auto parts, home appliances, and regular outdoor hardware |
| Phosphating | 24 ~ 72h | None | High | Grayish black | Medium | High-strength bolts, pre-coating treatment, lubrication & wear resistance |
| Blue-White Zinc Plating | 48 ~ 72h | Exists | Average | Matte blue-white | Medium | RoHS-compliant parts, low-profile outdoor fittings |
| Dacromet | Over 1000h | None | Very high | Silver gray | Medium-High | High-strength parts, marine environment, high temperature & long service life |
| Hot-Dip Galvanizing | Over 2000h | Low | Medium-High | Rough gray | Medium-High | Large structural steel, heavy outdoor anti-corrosion, maintenance-free facilities |
