Tag Archive for road engineers

The Copper Plating Story

We all know plenty about Copper Plating, but what we often don’t know a great deal about is where the process originated from.  I bet you would be interested to learn that it was not at all intentional, but was, in fact, a complete mistake!

Where did Copper Plating come from?

This happy accident occurred centuries ago in 1724, when Thomas Bolsover, a Sheffield cutler, was mending the handle of a silver knife.  He was doing so with the assistance of a copper coin under the pressure vice but got a little distracted and the two metals both became heated.  Due to their heating, they fused together, the silver completely hiding the copper.  This mistake led Bolsover to experiment with other methods of retaining silver and copper together in unity whilst also being one, workable material, and this worked.  This was Bolsovers happy accident, as this was the beginning of the Sheffield Plate.  Dying in 1788, Thomas Bolsover was regarded in his obituary as the first inventor of plated metal, though sadly not the most well known.

All About Copper Plating

Copper Plating is not only undertaken for functional purposes but for decorative purposes, too.  Often used for road mending techniques, medics and in telecommunications, it really is a multifunctional plating technique.  This is due to it being an excellent conductor, has a good ability to shield against electro magnetic interference and radio frequency interference, along with it having excellent levelling properties.  Copper plating is highly thought of in the medical world due to the fact that it naturally kills bacteria, thus making it a great protection against infections and diseases, so often also used in laboratory settings, too.

The Future’s Bright, The Future’s us

2008 saw the beginning of the EU process which took four years to put in to place, preventing incandescent light bulbs from being sold.  This was because they performed inadequately and were not eco-friendly due to the high amount of electricity they consumed.  The LED has therefore taken its place on our supermarket shelves, as they are proven to be much more efficient.

Plating Industries

The electronic and automotive industries, as well as most British households and road engineers for road lighting applications, are using LED lights.  The LED substrate can be silver plated either conventionally by rack or less conventionally by reel-to-reel plating procedures.  Plating differs depending on the thickness, and ranges from 20 to 150 A/dm², normally.

Bright Lights

How are LED lights so bright?  This is due to a low free-cyanide silver process which contains brightener additives.  This creates high luminosity.  These LEDs are much more eco-friendly, cost effective and use a fraction of the amount of electricity of an incandescent light bulb.

Heat Treatment gets the Deep Treatment

The silver deposits used to plate the LEDs were initially heated for 60 minutes at 200° and then for 120 minutes at the lower temperature of 170°C but it was quickly identified that significant reflectivity was lost during this.  So it was decided that a post-dip was going to be used in order to prevent the reflectivity loss, in the form of an aqueous treatment post heat treatment.  This seems to have worked, having been tested on multiple different types of nickel, at higher temperatures and with the nickel being treated for shorter lengths of time (up to 1 minute), as the GAM measurements do not diminish dramatically at all.  Thus, proving the effectiveness of the combination of plating, heat treatment and the post-dip aqueous treatment as a trio.