CURCUMIN AS A GREEN CORROSION INHIBITOR-A REVIEW

Abstract

Corrosion is the deterioration of metals by its environment. The corrosion leads to economic loss, damage of structures, leakage, contamination of environment etc. Eventhough, corrosion is an unwanted process, it has some beneficial effects such as batteries, electrochemical millings, electroplating etc. Lot of research works are going on to minimize the corrosion rate. The corrosion inhibitors are used to protect metals when it is part of a closed system. The inhibitors are used in cooling towers, heat exchangers, filtering equipments, storage tanks etc. The inhibitors are also used in pickling solutions. Chromate is the first type inhibitor used and was replaced by other inhibitors due to its toxicity. The green inhibitors are preferred due to their environmental friendly nature, ease of availability, cost effectiveness, non toxic nature etc. This review discusses the inhibition efficiency of curcumin for protecting metals in different environmental conditions based on the literature.