Bronze destanification

[ARW123]

Is bronze destanification (removal of tin) a common problem?

Would the disintigration of c/s machine screws through a bronze or gunmetal casting indicate brass screws rather than bronze (boat was almost exclusively in fresh water)?

[Gold Rock]

I'm not personally aware of a lot of common use of tin bronzes in marine applications. This of course is my limited case. Tin is considerably less anodic (less prone to galvanic corrosion) than zinc and isn't alloyed with copper in as high a proportin as zinc is in the case of many brasses. Thus though the loss of tin in a tin bronze would doubtless occur, it wouldn't seem to be nearly as likely an area for concern.

[ARW123]

Thanks, must be brass then.