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Monday, 18 March 2019 15:51

Galvanizing giants' lead-free switch

One of the world's leading corrosion protection companies has completed a conversion to lead-free galvanizing.

Wedge Group Galvanizing Ltd made the decision to eliminate lead from its process at all 14 of its plants across the UK ten years ago.

The completion of the process means the company is thought to be the first of its type in the country to become 'lead-free'.

galvanizers lead-free Wedge Group Galvanizing generic picSmall amounts of lead have been used to facilitate the galvanizing process for decades and it continues to be widely used today.

The challenge for Wedge Group Galvanizing was to develop the metallurgy and overcome technical challenges while maintaining and improving on the quality of the finish expected by its customer base.

Chris Woolridge, Managing Director of Wedge Group Galvanizing Ltd, said: "The amount of lead used in a traditional galvanizing process is very small but we wanted to remove it from our processes completely and made a firm commitment to do that 10 years ago.

"We have put a significant amount of time and effort into perfecting a methodology that produces even better results than before.

"The fact we believe we are the first galvanizing company in the UK to run a lead-free operation is a fantastic achievement."

The initiative was made particularly timely by the 2018 reclassification of lead massive contained in REACH (an EU regulation for the Registration, Evaluation and Authorisation of Chemicals).

galvanizers lead-free Chris Woolridge copyDavid Nobes, Technical Services Director at Wedge Group Galvanizing Ltd, said: "The reclassification could turn into a major headache for some of our customers, who might have to meet exceptionally tight tolerances or demonstrate exacting procedures. Some might even review the use of any process that involves lead as a result.

"Because of the commitment we made 10 years ago our process doesn't use lead at all and therefore removes any potential issues.

"Despite the challenges we've been running a lead-free galvanizing process in our plants for some time and we are very pleased with the results.

"It takes a very long time for background levels of lead to be removed from existing baths, but levels are monitored regularly and the fact we now achieve indicative levels of less than 50 parts per million (or 0.005%) within the bath melt means we can proudly claim our process is lead-free."