The substance in the air is oxygen. Copper + oxygen= copper oxide.
Copper wiring turns black due to oxidation. It is the air reacting with the metal. Copper wiring also sometimes turns green.
To dissolve the algae in a clogged pipe, you will have to turn on the dry or wet vacuum.
MEthane or CH4 with complete combustion will turn into CO2 and H2O The formula for complete combustion of methane: CH4 + 2O2-> CO2 + 2H2O
The brown copper(II) chloride absorb water and form the green dihydrate.
Copper pipes will turn black if the cold water running through them constantly condenses. You will see this happen most often during the summer months.
The substance in the air is oxygen. Copper + oxygen= copper oxide.
The copper pipe is reacting with metallic elements in the ground which in turn creates oxidation in the copper, which causes corrosion, which leads to holes in the copper pipe.
Foolish Fools!, it does infact turn Green! because the oxygen bonds with the copper to form copper oxide, wich is green, it reflects different fractions of light to the copper
Oxidation
If a person ties a piece of copper wire at the end of the exhaust pipe on a vehicle the copper is going to heat up. When the copper heats up it will turn a rainbow of colors.
Pewter turns it black, Copper does turn your skin green though.
Copper wiring turns black due to oxidation. It is the air reacting with the metal. Copper wiring also sometimes turns green.
Under voltage will not cause that condition. A temporary power overload will not cause that condition.I would look to the condition of the surrounding atmosphere where the conductors are situated. The presents of methane gas will cause the conductors to turn black and eventually start to flake the copper from the surface of the wire. Rubbing your finger on the wire that has the coating, will leave a brown-black residue on your fingerIn one case I dealt with the MCC in a sewage treatment plant, that had a methane problem, the MCC had to be completely rewired because of the disintegration of the units internal copper wiring.
Bad Preperation. Or water.
If you have a copper float ball that will do it
The copper wire glows red. Once it cools...the copper reacts with the air to produce copper(II) oxide. This is shown by the black tarnish on the copper wire.