Subject: What are the possible causes of electrolysis of SS salt water piping

Stainless steel piping (grade 304L) that is installed on-board a ship and 
carries seawater for sanitary use (toilets, etc) is experiencing massive 
corrusion, even thought is was installed only 4 months ago.  We believe it is 
being caused by electrolysis, possibly associated with an electrical short in 
a pump.  Can saltwater completely rust such pipe in only 4 months?  Other 
sites have confirmed that this is the correct pipe type for this use.  What 
other possible causes could it be?

Thanks in advance.

Re: What are the possible causes of electrolysis of SS salt water piping