Corrosion Pharmaceutical Engineering PDF Note Free Download. Corrosion is an undesirable process. Due to corrosion there is limitation of progress in many
areas. The cost of replacement of materials and equipments lost through corrosion is unlimited.
Metals and alloys are used as fabrication or construction materials in pharmaceuticals. If the
metals or alloy structures are not properly maintained, they deteriorate slowly by the action of
atmospheric gases, moisture and other chemicals. This phenomenon of destruction of metals and
alloys is known as corrosion.
Corrosion of metals is defined as the spontaneous destruction of metals in the course of their
chemical, electrochemical or biochemical interactions with the environment. Thus, it is exactly
the reverse of extraction of metals from ores.
Example: Rusting of iron