Specify for small components
Centrifuge (or spin) Galvanizing
Small articles may be galvanized by a variation on the standard hot dip galvanizing process and is known as ‘Centrifuge (or spin)
Galvanizing’.
In centrifuge galvanizing the work follows the same process route as for larger articles except the items are loaded into a basket which is spun at high speed immediately after removal from the molten zinc.
This removes surplus zinc and improves the uniform distribution of the zinc coating, while preventing pieces from sticking together. Work is normally quenched immediately after centrifuging.
Coating | Standard | Product | Size | Coating Thickness |
---|---|---|---|---|
Hot Dip Galvanizing | EN ISO 1461 | Threaded Not Threaded | > 6 mm ≤ 6 mm | 50 μm |
Hot Dip Galvanizing | EN ISO 1461 | Not Threaded | ≥ 3 mm < 3 mm | 55 μm 45 μm |
Hot Dip Galvanizing | EN ISO 10684 | Threaded | 50 μm | |
Sherardized | EN ISO 17668 / BS 7371-8 | 15 – 30 μm * | ||
Zinc Electroplating | BS 7371-3 / EN ISO 4042 | 5 – 12 μm * |
* Typical value
Table 1. Standards for protective coatings on threaded fasteners
Friction grip connections
Protecting threads when galvanizing
Other fabricated small components
A wide variety of small components can be galvanized. Typical examples might include clamps, hinges, hasps and clips. The materials used and the design of the component must be suitable for hot dip galvanizing and advice is available from Galvanizers Association to ensure optimum design of components.