Paints, Coatings & Finishes

GALVANIZING: THE SUSTAINABLE CHOICE

With its winning combination of long-lasting protection, ease of application and sustainability, galvanizing is the finish of choice for many industries across the globe including construction, manufacturing and agriculture.

By its very nature, the construction industry alone has a significant impact on the environment – accounting for 36% of worldwide energy usage and 40% of CO2 emissions*. It’s no surprise, therefore, that the introduction of evermore stringent environmental rules and regulations, as well as the high costs and ethical factors relating to industry, is seeing the increasing numbers of contractors, looking to adopt more environmentally-friendly processes, turning to galvanizing.

One organisation at the very forefront of the industry, which is helping those across a wealth of sectors become ‘greener’ is Wedge Group Galvanizing, one of the largest hot-dip galvanizing organisations in the UK. Over the past 12 months alone, the team has worked on a diverse range of projects, including the refurbishment of one of the busiest heritage railways in the country, the creation of a centrepiece for the new Digital Aviation Research and Technology Centre (DARTeC) at Cranfield University, and the construction of an iconic housing development in central Mayfair.

As a true heavyweight in its field, Wedge Group Galvanizing’s Sales and Marketing Director, Andy Harrison, explains the galvanizing process step by step, what makes it such a sustainable option and why it is increasingly becoming adopted by UK industries.

“Hot-dip galvanizing is, essentially, the process of coating clean steel with a layer of molten zinc to protect the item from corrosion and provide a long-lasting, durable surface. It’s more robust than other coatings that only bond chemically or mechanically, and it has the added advantage of fully coating the steel. As a finish, it is not only highly effective, but is also extremely eco friendly. A single, oneoff treatment will coat a product both inside and out, providing a finish that can protect steel and keep it maintenance free for over 70 years, considerably more in the right conditions.

“This means that the whole-life costs of products protected by the hotdip galvanizing process can be significantly reduced because there is no need for the expense, down-time and inconvenience of repeated onsite maintenance or replacement.

“Not only does galvanizing lengthen the lifespan of steel, but it is highly energy efficient throughout its production and whole lifecycle. The galvanizing process uses minimal resources to ensure a relatively-low environmental burden. Zinc’s non-ferrous properties mean steel can easily be recycled after use or regalvanized or removed and reused elsewhere.”

As a company, Wedge Group Galvanizing is leading the way by introducing a number of highlyinnovative and sophisticated elements to reduce waste, promote better use of resources and improve energy efficiency. To improve both fuel efficiency and performance, all plants use the most innovative pulse-fired, high-velocity furnace systems, which provide high fuel efficiency, low heat loss, low emission levels and extends the life of the kettle.

Another example of how the company, and the wider industry, is cutting energy consumption is the re-use of ‘waste’ heat created from the furnaces used in the galvanizing process. All of its plants have been fitted with heat exchanger units that transfer the ‘waste’ heat generated back into the overall process for use within both the pre-flux and de-grease tanks. The company also has rainwater collection and harvesting systems, which recycle rainwater back into the galvanizing process.

With the ongoing efforts being made within the industry to ensure that practices and procedures are as environmentally friendly as possible, and with many subsequently adopting galvanizing as their finish of choice, it seems that, as a process, it is set to long remain a leader in the sustainability stakes.  www.wedge-galv.co.uk

Source: *https://www.iea.org/topics/energy-efficiency