| Group A | Specimens in which a two layer organic coating that includes corrosion inhibitor was applied on the external surface of mortar specimens |
| Group B | Specimens in which a two layer organic coating that includes corrosion inhibitor was applied on the external surface of steel rebars |
| Group C | Specimens in which a two layer organic coating that includes corrosion inhibitor was applied on the external surface of mortar specimens and on the external surface of steel rebars |
| Group D | Specimens without inhibitor application |