Diesel & Copper tanks

johnneale

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I've heard that Diesel and Copper is a bad mix...... What happens and why ???
I gather copper exhaust pipes are banned as they can cause a poisonous gas, but my concern is for copper pipes/fittings and tanks in contact with diesel.
 
I had an old wooden motor sailer with a copper diesel tank. Never had any trouble. I think the first engine (1948) was petrol, but the Lister SL3 was installed in 1961, and I had her until 1996.
 
Two problems that I can think of.

Hydrocarbon lubricants foam badly if copper is included in the oil circuit. May also be a problem with diesel.

Diesel contains active sulphur, so copper sulphide could coat internal surfaces. I doubt whether this would be a major problem, but avoiding particulates in the fuel supply seems like a good idea,
 
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