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Author Topic: Best metal type for battery connections  (Read 927 times)
Tiff
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« on: August 26, 2016, 11:17:29 AM »


I have a collection old FLA batteries, as they are old and way past their best I'm reluctant to spend any money on proper battery clamps and so drill holes through the posts and bolt on the cables. These batteries are only used in the summer as a supplemental bank to store some of the excess PV production.

I tend to use whatever bolts I have to hand, so mainly zinc plated steel. On some batteries they corrode very badly and yet on some others they are fine. Even a coating of grease or vasoline doesn't seem to help on some. I'm guessing its mainly the zinc plating that is highly reactive.

What is the best metal type to avoid corrosion? Stainless steel? Brass? Plain steel?


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Westie
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« Reply #1 on: August 26, 2016, 02:37:29 PM »


What is the best metal type to avoid corrosion? Stainless steel? Brass? Plain steel?




Tinned brass is the usual.

I recall when I was an apprentice in the steel works  and working in the  'battery bay' for a few months. We used to recon the forklift batteries, testing and replacing bad cells.  To link up the cells we used make up  straps by casting lead rings on to each end of the conductor. To attach the straps between the cells we would use a set of welding leads, with a carbon rod electrode, connected across the battery and plunge the carbon rod into the battery post an melt it into the lead ring on the strap. Quite scary it used to be Wink  A lot of sparking and and arcing for a couple of seconds then the carbon rod would get red hot and you would start the 'melt'. The main worry was making sure the vent fans were working to ensure no hydrogen was in the area when you did this job.
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