Cleaning copper, 4 of 4
Numéro d’image : 13360854
| Cleaning copper, 4 of 4. When copper metal is exposed to the air, it tarnishes (corrodes) over time. Tarnish appears as a dull, dense film on the surface. It protects the underlying metal from further corrosion. Tarnish consists of various oxides, sulfides, sulfates, etc. that form due to reactions with gases in the atmosphere. A common way to clean copper (i.e. remove tarnish) is to treat it with an acid for several hours. Shown is a tarnished copper sheet before (Photos 1 and 2) and after (Photos 2 and 3) it has been cleaned with saturated citric acid. | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Turtle Rock Scientific |
| Taille de l’image : | 3335 px × 5107 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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