At normal operating temperatures (e.g., -20°C to 80°C), the surface treatment of qualified stainless steel handles will not noticeably change in appearance or performance due to temperature fluctuations. However, in extremely high temperatures (e.g., above 200°C) or low temperatures, some surface treatments may experience oxidation, discoloration, coating peeling, or embrittlement.
The high and low temperature resistance of different surface treatments varies, with the following key factors affecting their performance:
• Electroplating (chrome plating, nickel plating): Stable at normal temperatures. High temperatures (200°C and above) may weaken the adhesion between the plating and the substrate, resulting in peeling. Generally, there is no noticeable change at low temperatures.
• Brushing/polishing: Essentially a physical surface treatment of the metal, without additional coating, the surface withstands temperatures similar to the stainless steel substrate (typically above 400°C) and maintains stable performance under normal temperature fluctuations.
• Spray coating (plast spray, paint): Coating discoloration, softening, or even peeling can occur at high temperatures (80°C to 150°C and above). At low temperatures, material shrinkage may cause cracking, resulting in the worst temperature resistance.
• PVD coating (physical vapor deposition): has good temperature resistance and can withstand high temperatures of 200℃-300℃. It is not easy to change in appearance under normal temperature changes and is one of the more stable surface treatment methods.