Nickel Plating Services

Processing Overview

Description: Nickel plating is an electroplating process that deposits a uniform, bright, protective layer of nickel onto a metal substrate through electrolytic deposition. Nickel plating can be categorized as bright nickel plating, matte nickel plating, and multi-layer nickel plating (such as nickel-chromium composite plating). Thicknesses typically range from 5 to 50 μm, depending on the application. The nickel plating process includes pretreatment (cleaning and activation), electroplating, and post-treatment (passivation or sealing) to ensure strong interlayer adhesion.

Applicable Materials: Steel, copper, zinc alloys, aluminum and their alloys, and some plastic substrates (pre-plating with a primer is required).

Visual Appearance: A glossy silvery-white or matte gray surface with a mirror-like sheen or a soft texture enhances the overall aesthetics of the part.

• Excellent corrosion resistance: The nickel layer forms a dense barrier that resists acids, alkalis, and moisture, extending component life. This is particularly effective in marine and chemical industries.
• High hardness and wear resistance: Surface hardness can reach HV 300-600, reducing friction and wear, making it suitable for sliding components such as gears and bearings. Good Conductivity and Solderability: Maintains the substrate's conductive properties, facilitating electronic component assembly and soldering.
• Aesthetic Enhancement: Provides a glossy or matte finish and can be used as a base layer in combination with other coatings (such as chrome) to enhance product quality.
• Cost-Effective: More economical than gold or silver plating, suitable for mass production. Environmentally friendly, cyanide-free nickel plating reduces hazardous waste.
• Versatile Applications: Can be used for decoration, functional protection, or as a diffusion barrier, and is compatible with a wide range of substrates.

• Substrate Preparation: Ensure the surface is clean and free of oil and dirt. Improper pretreatment may cause blistering or flaking. Test substrate compatibility to avoid hydrogen embrittlement.
• Thickness Control: Select thickness based on the application. Excessive thickness may increase stress and cause cracking, while excessive thinness may result in insufficient corrosion resistance. Testing for uniformity is recommended.
• Environmental Considerations: In humid or corrosive environments, a sealant is recommended. Avoid high temperatures (>300°C) to prevent coating degradation.
• Design Considerations: Part geometry should avoid sharp corners or deep holes to ensure uniform plating. Plan shielded areas to prevent unnecessary plating. Safety and Environmental Protection: Use a cyanide-free process to reduce toxicity and comply with local environmental regulations; test for allergy risks (e.g., parts that come into contact with skin).
• Quality Testing: Adhesion, thickness, and salt spray tests are performed to ensure compliance with ISO 1456 or ASTM B689 standards.

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