Protection Effect of Admixed Melaleuca alternifolia and Citrus paradisi Macf. Oil Extracts on High Carbon and 3310 Low Grade Alloy Steels in HCl Solution

Principles and theories of green chemistry for corrosion science and engineering: design and application

“…528 Several studies have also explored the effect of combining various essential oils on the corrosion characteristics of metals. 521,529,530 These synergistic actions have demonstrated enhanced resistance against the infiltration of corrosion ions into metal surfaces. The mechanism by which essential oils inhibit corrosion entails an electrocatalytic effect, active site blocking effect and geometric blocking effect.…”

“…520 Furthermore, modern analytical instruments such as FTIR, UV-vis, SEM-EDX, AFM, XPS, XRD, contact angle tests, and Raman spectroscopy are increasingly employed to investigate the structural and morphological changes on metal surfaces in the presence and absence of essential oils. 517,521 For instance, the morphological assessment of the anticorrosion performance of essential oils derived from Elettaria cardamomum (ECPE). 522 The study revealed that the addition of 250 ppm ECPE reduced the average surface roughness and the contact angle of MS from 316.73 (blank) to 297.8 nm (ECPE) and 124.9° (blank) to 74.0° (ECPE), respectively, indicating their efficacy.…”