Not sure how useful this is being 4 years old but I ran across it and thought it might be of value given all the recent electrical corrosion discussions of late:
http://www.tc-11.com/Marine Electronics Test.pdf
I can't say my experience is similar to the test results but for what it's worth...
http://www.tc-11.com/Marine Electronics Test.pdf
I can't say my experience is similar to the test results but for what it's worth...