Answer
Sodium dichromate reacts with carbon and is reduced to chromium (III) oxide, which forms a corrosion resistant layer on the metal surface
$Na_{2}Cr_{2}O_{7} + 2C → Cr_{2}O_{3} + Na_{2}CO_{3} + CO$
Work Step by Step
Sodium dichromate reacts with carbon and is reduced to chromium (III) oxide, which forms a corrosion resistant layer on the metal surface
$Na_{2}Cr_{2}O_{7} + 2C → Cr_{2}O_{3} + Na_{2}CO_{3} + CO$
