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NoBozo · 02-10-2010, 03:29 PM

Crevice corrosion is REAL. Back in the seventies, yacht builders were experimenting with Solid Rod Rigging for staying the masts on large racing yachts. Some of the rods were even elliptical in shape to be more aerodynamic. The Terminals at the ends of the rods were threaded directly onto the rods.

Picture a very expensive custom built 73' racing yacht sitting at the dock in sunny Miami....and the mast suddenly just falls over the side for no apparent reason.

Crevice Corrosion. It's actually caused by a Lack Of Oxygen in a crevice...combined with a mildly corrosive solution such as water, between the threads in the fittings. It took awhile for the exact cause to be determined.

Finally a guy who started his own rigging company, started experimenting with a Cold Heading process for attaching terminals to ROD rigging that would not be susceptible to Crevice Corrosion. The company was called NavTec. Problem solved.

BTW: ALL Galvanized chain, shackles, and fittings are far superior to Stainless Steel....on a mooring or any other ground tackle.

NB

02-10-2010, 03:29 PM	#21
NoBozo Senior Member Join Date: Jun 2008 Location: Portsmouth. RI Posts: 2,231 Thanks: 400 Thanked 460 Times in 308 Posts	For Inquiring Minds :) Crevice corrosion is REAL. Back in the seventies, yacht builders were experimenting with Solid Rod Rigging for staying the masts on large racing yachts. Some of the rods were even elliptical in shape to be more aerodynamic. The Terminals at the ends of the rods were threaded directly onto the rods. Picture a very expensive custom built 73' racing yacht sitting at the dock in sunny Miami....and the mast suddenly just falls over the side for no apparent reason. Crevice Corrosion. It's actually caused by a Lack Of Oxygen in a crevice...combined with a mildly corrosive solution such as water, between the threads in the fittings. It took awhile for the exact cause to be determined. Finally a guy who started his own rigging company, started experimenting with a Cold Heading process for attaching terminals to ROD rigging that would not be susceptible to Crevice Corrosion. The company was called NavTec. Problem solved. BTW: ALL Galvanized chain, shackles, and fittings are far superior to Stainless Steel....on a mooring or any other ground tackle. NB Last edited by NoBozo; 02-10-2010 at 04:35 PM.