Doing some more research and talking with colleagues, galvanized bolts into non-galvanized plate is likely ok. It would be similar to the galvanized nuts getting their threads cut post-galvanizing. Does that make sense?
We design custom machines often used in civil structures. Straddling the mechanical and structural worlds can be a "fun" challenge at times! These projects often require corrosion resistant hardware (galvanized, stainless) and we require slip critical connections as they are subjected to...