316l is food grade and will show some staining if exposed to corrosive solutions but it depends on temperature as well. It may appear to have a brownish colour when exposed to a warm sea water environment. I would say there is some degredation caused by welding if you are seeing rust after only exposing it to water.
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05-05-2013, 05:11 AM #11Senior Member
Miller syncrowave 200 runner with coolmate 4
- Join Date
- Oct 2009
and wp2025 weldcraft torch
Miller 125c plasma cutter