Our Vacuum Metallising Chamber Is a Cutting-Edge Metal Coating Service

Transform your product with a finish that not only dazzles but also enhances performance and longevity. At Chrome Spray in Basildon, our state-of-the-art vacuum metallising chamber uses advanced Physical Vapor Deposition (PVD) to deliver unparalleled metal coatings. Serving clients across the UK, we can provide the perfect finish.

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What Is Vacuum Metalising?

Vacuum metalising, or vacuum metallisation, is a process that creates a thin metallic layer on a non-metallic surface using physical vapour deposition (PVD). In this process, metals like aluminium or copper are evaporated in a vacuum chamber and then condensed onto the surface of a substrate, forming a metal coating. This method is used for both decorative and functional purposes, such as enhancing appearance or providing reflective and shielding properties.

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How Does the Vacuum Metalising Process Work?

The vacuum metalising process involves heating metal wire in a vacuum chamber until it evaporates, which happens at around 1500°C (2700°F). The metal vapour then adheres to the surface of the substrate, creating a thin metallic coating. The lack of pressure in the vacuum chamber lowers the metal’s boiling point, making the process efficient and precise.

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What are the types of coatings used in vacuum metalising?

Vacuum metalising coatings are either decorative or functional: • Decorative Coatings: These enhance the appearance of the coated parts, using metals like aluminium, copper, or stainless steel to produce a variety of finishes, from bright metallic to subtle shades. • Functional Coatings: These serve practical purposes, such as: o Reflective Coatings: Commonly made with aluminium, providing up to 90% reflectivity, used in lighting reflectors. o Shielding Coatings: Made from highly conductive metals like copper, offering protection against electromagnetic interference (EMI) and radio-frequency interference (RFI).
What are the common applications of vacuum metalising?

Vacuum metalising is used across various industries for applications such as: • Vehicle and appliance components • Lighting reflectors for industrial, commercial, and automotive uses • Decorative items and product packaging • EMI/RFI shielding in electronics • Mirrors, glassware, and solar panels
Why is aluminium preferred for vacuum metalising?

Aluminium is the most common metal used in vacuum metalising because of its high reflectivity and low cost. While copper and silver have better electrical conductivity, aluminium’s cost-effectiveness and resistance to oxidation make it the ideal choice for reflective coatings.
How thin are the layers applied during vacuum metalising?

The thickness of the layers applied during vacuum metalising varies depending on the purpose: • Decorative films: 0.02 - 0.1 microns • Reflective films: 0.05 - 0.1 microns • Shielding films: 1 - 2 microns
What is Electromagnetic Interference (EMI) and how does EMI shielding work?

Electromagnetic interference (EMI) occurs when electronic devices are disrupted by external electromagnetic fields. EMI shielding uses conductive materials, like copper or aluminium, to block these fields and protect sensitive electronics. This is crucial for preventing damage or malfunctions in devices like medical equipment, computers, and automotive radar systems.
What are the differences between vacuum metalising and electroplating?

Though both processes involve coating a metal onto a substrate, they differ in several key aspects: • Material Used: Vacuum metalising typically uses aluminium, while electroplating commonly uses chrome or nickel. • Process Environment: Vacuum metalising is performed in a vacuum chamber, making it cleaner and more environmentally friendly, while electroplating occurs in a liquid electrolyte solution. • Durability and Appearance: Vacuum metalised coatings offer brighter colours and better corrosion resistance compared to electroplated surfaces.
What are the steps in the vacuum metalising process?

1. Custom Fixtures: Parts are secured in custom fixtures to ensure a uniform coating. 2. Primer Application: A primer is applied to improve adhesion and surface smoothness. 3. Metalisation: The metal is evaporated in a vacuum chamber and condensed onto the substrate. 4. Top Coat Application: An optional top coat is added to enhance durability and appearance. 5. Quality Inspection: Each part undergoes rigorous inspection to meet quality standards.
What are the advantages of vacuum metalising?

Vacuum metalising offers several advantages, including: • Precision: The process allows for thin, uniform coatings. • Versatility: It can be used on a wide range of materials and for various applications. • Eco-Friendliness: It is a cleaner alternative to traditional plating methods. • Cost-Effectiveness: Particularly with aluminium, it provides excellent performance at a lower cost.