The utilization of corrosion inhibitors offers a cost-effective strategy to reduce corrosion in metal samples. There is a growing focus on developing inhibitor formulations that are both economical and environmentally friendly, emphasizing traits like biodegradability and affordability. Plant extracts, such as those from Azadirachta indica, commonly known as neem, have gained attention for their potential as corrosion inhibitors. This review highlights the inhibitory effects of various neem extracts, including neem seed oil, gum, and leaves extracts, on different metals and alloys. Neem extracts contain biocidal compounds like azadirachtin, which enhances their inhibitory effects, particularly in environments prone to biocorrosion. In summary, products derived from neem show promise as green corrosion inhibitors for a wide range of metal substrates, offering potential for use in corrosion protection applications.
Swathi et al. (Sun,) studied this question.