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Hydrogen Fluoride (HF) will react with the surface of the aluminum and convert the aluminum oxide to aluminum fluoride. Water (H2O) is produced as a byproduct. In this way the HF works as a polishing agent to make the aluminum "shiny" again. Depending on the concentrationof the HF, the contact time, and temperature, the HF can continue to react with the aluminum and corrode it.

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14y ago
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10y ago

No effect. Hydrogen ions are not reduced by gold with any normal acid concentration. Add powerful oxidiser like nitric acid and you may have some effect as you may form a gold fluoride complex.

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Q: What effect does hydrofluoric acid have on gold?
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