Aqueous extracts of mango and orange peel as green inhibitors for carbon steel in hydrochloric acid solution

Evaluation of Castor Bark Powder as a Corrosion Inhibitor for Carbon Steel in Acidic Media

“…The results displayed in Table 1 show that the inhibition efficiency of castor bark powder against AISI 1020 carbon steel corrosion increases up to 83% when 1.77 g.L -1 was added to the solution. Several scientists in their studies reported similar results for green inhibitors 4,10,[30][31][32][33] . The maximum values achieved are also compatible with those found for other castor oil compounds [20][21][22] .…”

“…However, this material has low corrosion resistance in acidic media, which can lead to economic losses. Industrial processes as acid cleaning, acid pickling and oil acidification typically use aggressive species, such as hydrochloric acid, which severely attacks carbon steel, being necessary the use of corrosion inhibitors to protect it 1,2 . Corrosion inhibitors are substances which when added in small quantities to solutions can significantly decrease the metal corrosion rate.…”

“…Because of this, researchers have been focused in investigating the inhibitory properties of easily available and low cost natural products that, in addition, are not harmful to health and to the environment, which are generally denominated green inhibitors 6 . In the literature, several studies are available on the efficiency of leaves or peel extracts as corrosion inhibitors for carbon steel in acidic solutions (generally electrolyte prepared using 37% m/v HCl), like aqueous extracts of mango and orange peel 2 , and alcoholic extracts of Astemisia Mesatlantica oil 7 , Roselle 8 , Eruca sativa 9 , Saccocalyx satureioides 10 , Argemone mexicana 6 , Chrysophyllum albidum 11 , Agavoideae 12 , Tiliacora accuminata 13 , Pimenta dioica 14 , Ilex paraguariensis 15 , Aniba rosa eodora 16 , Ruta chalepensis 17 .…”

Roasted Coffee Extracts as Corrosion Inhibitors for Mild Steel in HCL Solution

“…In recent years, interest has increased in the development and use of low-cost and eco-friendly compounds as corrosion inhibitors for mild steel [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] . Plant extracts are generally inexpensive and can be obtained through simple extraction processes.…”

“…Plant extracts are generally inexpensive and can be obtained through simple extraction processes. In our previous works, the effect of aqueous extracts of spent coffee grounds, garlic peels and fruit peels (mango, orange, passion fruit and cashew), grape pomace and green Yerba mate on the corrosion of carbon steel in 1 mol L −1 HCl was studied 1,[14][15][16][17][18] .…”