Galvanic corrosion
		
		
				
				
		
			
				
					I'm no chemist but I'd agree that I don't see how it works if it's not completely submerged as it's the water that earths the current.  If it works we could also just treat our steel cars like oil rigs and bolt a lump of alluminium to the chasis!  Whenever I don't see miricle before and after photos by a non-affiliated examiner I have my doubts!
Dave
				
			 
			
		 
			
				
			
			
				1974 Military Lightweight Landy --- Some dementia at 50 years old
2000 Disco series 2 now sadly moved on!
No5 Trailer joined the fold... Awaiting graduation to road licensed!
2021 Mazda BT50 or is that DMax?
			
			
		 
	
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