Copper Epoxy in a Mud Berth

[oldmanofthehills]

Organisms includes people, so let's hope the concentration doesn't get too high

The smell of rotting seaweed is part H2S and no one died just of walking on the weed strewn beach. Very dangerous in large concentrations but not cumulative and merely smelly in small concentration. I have been told very high concentration dont smell, so perhaps that kills the sense organs

 

[AntarcticPilot]

The smell of rotting seaweed is part H2S and no one died just of walking on the weed strewn beach

I have heard that if you can smell it, it's ok - in killing concentrations, you can't smell it. ADDITION: I just checked in Wikipedia and this is correct.

I've also heard that PURE H2S has no smell - it's impurities that we smell.

I speak as someone who did routine analyses using Ammonia as a reagent, working days on end in an atmosphere heavily contaminated with Ammonia (analyses for sulphate in London Clay). So my sense of smell is desensitised regarding some smells! Therefore, I tend to be careful - if I can smell something, it's probably in a high concentration.

 

[VicS]

I have heard that if you can smell it, it's ok - in killing concentrations, you can't smell it. ADDITION: I just checked in Wikipedia and this is correct.

I've also heard that PURE H2S has no smell - it's impurities that we smell.

I speak as someone who did routine analyses using Ammonia as a reagent, working days on end in an atmosphere heavily contaminated with Ammonia (analyses for sulphate in London Clay). So my sense of smell is desensitised regarding some smells! Therefore, I tend to be careful - if I can smell something, it's probably in a high concentration.

I am intrigued. How do you analyse clay for sulfate?

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[AntarcticPilot]

I am intrigued. How do you analyse clay for sulfate?

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It was over 40 years ago, and I don't recall the details! A quick Google suggests that the method I was using is no longer in use; I can't find an online reference. But it involved digesting the clay with ammonia solution, filtering and then baking what was left on the filter paper. It was a temporary job as a lab technician that I was filling in with, and I was just following a laid down procedure. Apparently the sulfate content of London Clay varies widely and is important for its geotechnical properties. But I was never a soil engineer!

 

[oldmanofthehills]

Ancient experience informs ones current reactions. I used to work as a chemist and we had big precautions against cyanide gas- which smells like bitter almonds. I still cant bear to eat Bakewell Tart

 

[Lucy52]

The mud near here was used to make bricks, it forms a hard coating on the hull which is difficult to remove.

Because of this, some consider CC to be wasted, it is covered over by the mud.

The antifouling may leach into this layer and still work, though small barnacles still grow on the mud.

The water is brackish, and we get weed growth around the waterline, which CC might help prevent.

 

[Stemar]

Jissel had Coppercoat on a mud berth in Portsmouth Harbour. It didn't work, but nor did any of the other potions I tried. In the end, I gave up and just scrubbed off a few more times during the season. Easy for those with suitable facilities, but expensive if you have to be lifted out to do it.