Flourished Corrosion

Looks like a hot dipped galvanized nut and bolt....

Indeed they were galvanised. But why this "bursting" shape?

By the way, many thanks for such a nice pics!!

Perhaps a repeated cycle of wetting, corrosion, and drying, with the dry cycle causing shrinkage and cracks and the possible condensation deposit of other minerals from sea water. Repeat for 30 years and what you see is what you get.

It was a (weak attempt at) a joke. One tap with a hammer & cold chisel will probably sort it out.

... and a bad attempt at replying - sorry. (Note to self: upgrade mobile 'phone soon, in the hopes that new one has a better CR4 interface).

Like the heat here in Arizona. It's a dry humor.

Have you been taking photographs around our foundry effluent plant?

The fluoropolymer bolts were good if the fitters wouldn't insist on reusing them.

Generally speaking corrsion in a conductive atmophere follows the same rules as deposition, ( electro-forming) but in reverse, so the maximum rate of corrosion occurs at the minimum radius, the sharp points. The presence of other connected surfaces near the area in question also obviously affects the result.

If you look into electro-forming 'trees' you will similar natural forms, caused by minute irregularities that are amplified by the iterative process, which governs most growth be it in crystals, animals or plants. Salvadore Dali made it into an art form and sold it very sucessfully. He loved the unexpectedness of electroplating, especially gold. Nickel does it very well, too.

Was probably attacked by vicious... halomonas. S.M.

Thanks, this explains why my nuts are looking funny, I thought it was just natural ageing.

Dear all,

many thanks for your inputs!!

Salu2 cordiales,

Abel