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Gold/Mining/Energy : Precious and Base Metal Investing -- Ignore unavailable to you. Want to Upgrade?

To: Condor who wrote (23959)	11/13/2003 11:16:42 AM
From: Tommaso	Read Replies (2) \| Respond to of 39344

>> Another thing I have never understood is why they do not use sacrificial anodes on cars, of magnesium like they do on pipelines, or active galvanic protection like they do on ships. Make the car a cathode (negative pole of a battery -36 volts to vehicle, no return) and it cannot corrode.<< Cars already have -12 volts to the frame. Does that help? Is the -36 volts supposed to come from a separate battery? If so, what is the positive pole of the battery attached to? Does he mean a very low amp current through the car frame? Active galvanic protection works with a ship because a ship in saltwater is in an electrolytic solution and a current can flow through a sacrificial anode of zinc, through the water, and back to the ship's hull. (Or maybe it is vice-versa). Maybe he wants to park his car every night in a swimming pool full of saltwater to preserve it from corrosion? <G>