Electric Tingle When touching the hand rail - Could I have created a battery?

Another question. While perusing some other threads dealing with 'bonding' and 'Neutral-Earth Voltage', I saw mention of the SAFTRON, non-conductive ladders and rails. I know that grounding the anchors would be much less expensive, however, it might be worthwhile to not put another cut in my concrete.

Would this be an acceptable alternative to grounding the rail anchor?
 
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