View Single Post
Old 08-17-2016, 08:27 AM   #24
tadhana
Guru
 
tadhana's Avatar
 
City: New England and Canada to Florida
Vessel Name: Tadhana
Vessel Model: Helmsman 38 Pilothouse
Join Date: Jul 2011
Posts: 596
When an "expert" uses the term "electrolysis" I know that marine corrosion is not their field of expertise. In my tenure with ABYC I helped develop the ABYC Marine Technician Corrosion course. In boats, the corrosion we most often deal with is galvanic corrosion. An application of sacrificial anodes is usually involved. We sometimes see stray current corrosion, but not very often. With stainless steel in salt water we sometimes see crevice corrosion. Adding anodes will not make any difference if crevice corrosion is the issue. As one who has SS sea strainer baskets, I see the corrosion start at the welds. This is a good indication that the issue is indeed crevice corrosion. Our boat was built in China in 2008 and some of the sea strainers are US products and some are Chinese. I have fewer problems with the baskets from Buck Algonquin, and can order replacements. I cannot seem to find replacement baskets for the Chinese knock off sea strainers.
tadhana is offline   Reply With Quote