T&T: Zinc question

[John Baker]

Another consideration is how your trim tabs were painted.  Did they both have bottom pain on them and was it an equal amount.  As we all know, bottom paint has copper in it and tha zinc is gonna lose that battle.  The paint should never be in contact with the zinc but maybe it was in this case....or maybe the hydraulic action of the water affected one side more than the other.
   
  Trawler on,
  John

StWillett@aol.com wrote:
  I recently installed zincs, the dome type about 1.5 inch diameter, bolted 
thru on both sides of the my SS trim tabs. After a month trip I was surprised 
to see the top zinc was almost all gone, I was more surprised to see the zinc 
underneath was like new. Does any one know why would one be affected more 
than the other? Both had full contact with the SS tab and the bolt was tight.
Thanks 
Steve Willett
Camano 31
Thibodaux,Louisiana
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