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Spin galvanising: what is it, and what are the benefits?

While hot dip galvanising is a common metal treatment method, spin galvanising is key for galvanising small pieces. We cover what spin galvanising is, how it works, and the benefits it offers here.

What is spin galvanising?

Spin galvanising is a process used to coat small metal parts with zinc. It is particularly useful for coating small, complex parts that may be difficult to dip into a galvanising bath. The process involves placing the pieces in a basket, which is then submerged in molten zinc, withdrawn, and spun at high speeds. Spin galvanising is used to increase the lifespan of steel by making it more robust, durable, and rust-resistant.

How does spin galvanising work?

Spin galvanising involves several steps. First, the parts that need treating are cleaned and prepared for galvanising. This involves removing any dirt, grease, or other contaminants by using a method such as shot blasting.

Next, the parts are placed in a basket which is then submerged into molten zinc. The basket acts as a barrier, stopping the pieces from being lost in the bath. Once a zinc/alloy layer forms, the basket is withdrawn and spun at high speeds. The spinning action distributes the zinc evenly over all parts and removes any excess, creating a uniform coating.

Finally, the coated parts are removed from the basket and inspected to ensure that the coating is even and free of defects.

Benefits of spin galvanising

Spin galvanising has numerous distinct benefits:

Protect small pieces: One of the main benefits of spin galvanising is that small parts can be galvanised without being dipped directly into a bath. You gain the benefits of hot dip galvanising without losing any pieces. This makes it an ideal solution for protecting fasteners, fixings, hinges, and chains.

Increased durability: Unlike surface-level coatings such as paint, the zinc layer used with galvanising chemically bonds to the metal, making it stronger against corrosion. The zinc coating is also thicker than alternatives, further contributing to its durability. The increased durability enhances the metals lifespan, saving you time and money on repeated coatings.

Environmentally friendly: Galvanising produces less waste compared to other methods, as it only uses the amount of zinc needed. This makes it an environmentally friendly option, fitting into a circular economy.

Save money: You can expect to see a greater return on investment with spin galvanising. Spin galvanising makes the metal more durable, reducing the frequency of maintenance needed, and reducing the associated labour costs such as transportation. It is also a fast process with a short turnaround time, so the parts are returned to you quicker.

Spin galvanising is a cost-effective, efficient, and environmentally friendly method for coating small parts with zinc. It offers enhanced adhesion, consistency, and reduced material waste compared to other steel protection methods. It is the ideal choice for protecting your small metal pieces.

At Widnes Galvanising, we offer spin galvanising via sister plant at Telford. Contact us today to learn more about how we can help you protect your metal from rust and corrosion.

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