| 21. | :A solution of vinegar and salt will remove copper oxide quickly, and probably also etches copper very slowly.
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| 22. | However, oxidative degradation can occur in these alloys as copper oxides form in atmospheres that are rich in oxygen.
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| 23. | The Escondida North deposit and the copper oxide expansion extend the mines productive life-span to 40 years, Pickering said.
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| 24. | This indicates that the black copper oxide comes partially from the cuprate and partially from the PCB copper circuitry.
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| 25. | These micronized preservatives use nano particles of copper oxide or copper carbonate, for which there are alleged safety concerns.
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| 26. | One prime example is yttrium barium copper oxide which can be insulating or superconducting depending on the oxygen content.
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| 27. | It won't rust, but it is 90 percent copper, so it's going to turn green with copper oxide or verdigris.
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| 28. | The shades of green, aging at about 600 million years, are made up of phyllites, and slates of copper oxide.
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| 29. | The jade green color of the lake is attributed to the presence of copper oxide leached from the bedrock underneath.
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| 30. | Until 1963, the Black Rock open cut produced copper oxide ore that was used as a flux in the copper smelter.
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