In the Gougeon Brothers book on boatbuilding, they devote a section on
bonding stainless steel bolts with epoxy. I had planed to bond the bolts
on my skeg in similar fashion an so I set up a test. I drilled a slightly
oversized hole in a piece of ash, which I intend to use for my skeg
floors, cleaned up a piece of the 1/2" silicon-bronze rod which will be
used for my bolts, and epoxied it into the hole. After several days in a
warm place, I inspected the setup. The epoxy that is on the wood has set
up nearly glass hard as normal, but all the epoxy touching the bronze is
gummy and I can peel it off with my fingernail. The gummy epoxy has turned
blue, just like copper would with exposure to salt. I can also see blue in
the epoxy between the wood and the bronze.
Anybody know why epoxy would react this way with bronze?
Al Gunther, Kingston, WA <---- 47 52.7'N, 122 30.9'W