Tinning bright / matt
The galvanic tinning is a process of electrochemical tin metal precipitation from the acid solution of one or more tin salts. This coating belongs to the basic functional coatings to improve the natural properties of the coated metal parts. It is used mainly in these two technologic fields - in electrotechnics and food-processing industry. But it can be also applied in different branches. Matt tinning is especially used to create well electric conductive and solderable finishes on the surface of electrotechnical components without usage of excess organic brighteners in the solution. Bright tinning with additional brighteners is on the other hand widely used in food industry due to the especial non-toxicity and hypo-allergeneticity of metal tin. That is why tin is often used for coating of metal components those are in occasional or permanent contact with food-stuff.
Layer properties
- Improves electric conductivity.
- Improves or enables solder ability even by the good conductors, which are difficult to be solder.
- Suitable for foodstuff.
- Basic corrosion resistance.
- Matt or bright decorative appearance.
Deposition
- 5 - 20 μm (according to the customer demands)
Way of processing
- Barrel plating
- Rack plating - in depend of deal
Basic material - substrate
- Steel and iron alloys
- Copper (+ Ni underlayer)
- Copper alloys (+ Cu/Ni underlayer)
Application field:
- Electronics, microelectronics, printed circuits (PCB, PWB).
- Food-processing industry - packaging, utensils, kitchen appliances.