What is TiZr passivation?
TiZr is shorthand for the titanium zirconium passivation process applied to aluminium components. This removes the natural oxide layer and replaces it with a stable, chemically modified ‘shield’ layer. Passivation is also referred to as conversion coating.
TiZr passivation creates a stable surface which will allow bonding and welding processes to deliver repeatable, strong, durable adhesive bonds. This conversion coating process also provides a stable base for powder coating and offers additional protection against corrosion. This is important in environments where the aluminium component may be exposed to moisture, chemicals, or high temperatures.
TiZr passivation and laser welding
TiZr is becoming increasingly popular as a pre-treatment for laser welding, the protective surface preventing unwanted oxidation around the weld zone. The clean, passivated surface promotes better laser absorption and a more consistent weld, reducing the risk of porosity, cracking, or defects in the weld seam.
Over 20 years’ experience in providing TiZr pre-treatments
As the first metal treatment provider in the UK to install TiZr as a chrome-free passivation process (since 2001), Powdertech Surface Science is the most experienced outsource TiZr pre-treatment provider in the country with an unrivalled body of knowledge. We use the latest Gardobond® systems for TiZr passivation and apply it to aluminium components (cast, extruded or formed) to enhance adhesive durability for metal-to-metal bonding and welding.
Powdertech TiZr matches anodising for enhanced adhesive bonding
Extensive testing shows that the stable, protective passivation layer achieved through Powdertech TiZr matches the performance of anodising for durability of adhesive joints.
TiZr pre-treatment has a faster lead time than anodising, uses less energy and is a more cost-effective and environmentally appropriate process than anodising.
