As a leading knob manufacturer for gas stove , oven and range, we specialize in delivering components that withstand heat, grease, and daily wear. Surface treatment is critical to ensure longevity and visual appeal. Below, we analyze three core processes: spraying, electroplating, and oxidation—helping you choose the ideal finish for your appliances.
1. Spraying: Custom Colors & Textures
Best for: Budget-friendly knobs requiring heat resistance up to 200°C.
Key Methods
Powder Coating
- Process:Electrostatic application of epoxy/polyester resin, cured at 180-200°C.
- Benefits for Knobs:✓ Scratch-resistant, thick coating (60-120μm) ✓ Matte/gloss finishes (RAL colors available)
Liquid Spraying
- Process:Spray-painted acrylic or silicone-based coatings.
- Benefits for Knobs:✓ Smooth metallic/woodgrain effects
2. Electroplating: Luxury & Durability
Best for: Premium knobs requiring metallic luster and extreme durability.
Common Plating Types
Type | Thickness | Key Properties | Ideal Use |
Chrome | 10-20μm | HV 800-1,000 hardness | High-end stove knobs |
Nickel | 5-15μm | Anti-corrosion | Budget metallic knobs |
PVD Coating | 1-5μm | Gold/black finishes | Designer oven controls |
Advantages for Appliances:
- Withstands frequent cleaning with abrasive detergents.
- Passes 96-240h salt spray tests (ISO 9227).
3. Oxidation: Lightweight & Corrosion-Resistant
Best for: Aluminum knobs in humid/coastal environments.
Anodizing Process
- Pre-treatment:Degrease → Etch → Desmut
- Anodizing:Immerse in sulfuric acid bath (15-20V DC, 30-60 mins)
- Sealing:Hydrothermal sealing to lock pores
Benefits for Knobs:
- Natural matte texture (Ra 0.4-1.6μm) with dyeing options.
- Superior heat dissipation vs. plastics.
- Salt spray resistance: 1,000+ hours (Class II anodizing).
FAQ: Surface Treatments for Appliance Knobs
Q1: Which finish suits high-temperature oven knobs best?
A: Electroplated chrome or PVD coatings (heat resistance up to 300°C).
Q2: How to maintain electroplated knobs?
A: Wipe with a soft cloth; avoid acidic cleaners to prevent dulling.
Q3: What are the processing methods to increase the friction if I want the knob surface to have unique texture?
A: Knurling can be rolled out to increase friction, and the cost is low; sandblasting can create a rough texture to enhance friction and industrial aesthetics; brushed metal to form a unique texture, taking into account the aesthetics and certain friction effects.
Why Partner With Us?
- 10+ Years Expertise: Hundreds knob designs for global appliance brands.
- Certified Quality:ISO 9001, RoHS, and REACH compliance.
- Fast Sampling:7-day lead time for custom finishes.
Whether you need knobs for gas stoves, ovens, or industrial equipment, our products are designed to enhance functionality and user experience. Contact us today to request a free quote or sample!