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One of the final processes in the manufacture of
a lead electrode in an automotive or industrial
battery is the formation step. Depending on the
application the lead electrode is suspended in a
Sulphuric Acid solution and varying electrical
currents are passed through the plates for up
to 48 hours.
This process heats the acid to produce a very corrosive environment and in the early days of the industry these formation tanks were wooden construction and later rubber lined steel. Chem Resist were approached to design an alternative in thermoplastic.
Polypropylene is an ideal material for this application
with its resistance to Sulphuric Acid and high
temperature capability. Chem Resist has more than
40 years' experience designing and fabricating in
Polypropylene but the challenge of making hundreds
of tanks required the development of new
manufacturing processes.
A combination of CNC machining of component parts and high speed welding systems were developed to meet the challenge. Several thousand formation tanks have now been supplied to all corners of the world.
