Tinning with glossy or matt finish
At AG Technical’s plants, we are able to perform both glossy and matt tinning to meet different aesthetic and functional requirements.
Glossy tin plating gives the surface a shiny, reflective appearance, emphasising the metallic texture and enhancing the components in environments where aesthetics are key.
On the other hand, the matt finish gives a more sober and uniform appearance, with less reflectivity, ideal for applications where you want to reduce glare, improve visual acceptability or facilitate painting or the application of additional treatments.
The choice between glossy and matt therefore depends on both the desired final appearance and the technical specifications: for example, matt surfaces may be more suitable when better grip or less glare is required, while glossy surfaces enhance the “bare metal” effect and can facilitate cleaning and visibility of the elements.
Acid baths and alkaline baths, two types of tin plating
Tin coatings can be applied using two different methods: immersion in acidic baths or alkaline baths.
In the first case, a stannous compound (divalent tin) is used, while in the second case, a stannic compound (tetravalent tin) is used. The result is that the electrochemical solution in acidic baths is double the solution in alkaline baths. This leads to a higher current efficiency for acidic baths and a faster plating treatment.
When, instead, a high penetration power is required due to the particular shape of the objects to be plated, alkaline baths are preferred.
The equivalent of tin electroplating in the metal protection systems offered by Argos Surface Technologies consists of polymers coatings, which ensure excellent non-stick properties, corrosion protection and smoothness. Teflon PTFE and Teflon PFA non-stick coatings also give the surface non-stick properties and resistance to chemical agents.
Functional properties of tin plating
Tin plating plays a fundamental role in protecting metals from corrosion caused by atmospheric agents, water and environmental contaminants. The tin layer acts as a protective barrier, limiting the oxidation of the underlying metal and extending the useful life of the component.
In addition, tin plating ensures high electrical conductivity, making it perfect for electrical and electronic applications where good signal or current transmission is required.
No less important is its excellent weldability: tin is a metal particularly suitable for welding and facilitates assembly operations as well as ensuring a reliable connection between the various metal components.
In summary, tin plating not only improves aesthetics but also enhances functionality, making it a preferred treatment for components that require protection, conductivity and weldability.
Areas of application
Tinning is an extremely versatile process, used in numerous industrial sectors thanks to its protective and functional properties. In particular, it is ideal for the food industry, where tin is used for its chemical inertness and lack of contamination, ensuring safe surfaces in contact with food and beverages.
At the same time, it is widely used in the electronics industry, where the excellent electrical conductivity and weldability of the tin coating make the treatment essential for electrical components, connectors, printed circuits and parts intended for electronic assembly. This dual vocation, food and electronics, highlights the reliability and flexibility of tin plating in contexts that require high quality standards.
The treatment complies with Directive 2000/53 / EC; 2002/45 / EC; 2002/62 / EC; 2002/95 / EC and 2011/65 / EU (Rohs); 2004/96 / EC; 94/27 / EC; 2002/61 / EC; 2001/95 / EC; 2003/11 / EC; 2004/21 / EC; 2003/36 / EC; 2003/53 / EC; 2006/122 / EC; Regulation 1907/2006 (REACH).
